Abstract: A method for designing and tuning a PID process controller includes approximating a process as a second order process but in a manner that includes the effects or characteristics introduced by various different devices in the I/O network, and using a lambda tuning method to determine tuning parameters or coefficients for the PID controller. The enhanced controller design and tuning method provides a systematic manner of achieving performance improvement of PID controllers within a process control system and is effective at overcoming challenges arising from signal aliasing, the use of anti-aliasing filtering and the effects of different I/O settings of both traditional and advanced I/O marshalling architectures.

Abstract: A Multi-Purpose Dynamic Simulation and run-time Control platform includes a virtual process environment coupled to a physical process environment, where components/nodes of the virtual and physical process environments cooperate to dynamically perform run-time process control of an industrial process plant and/or simulations thereof. Virtual components may include virtual run-time nodes and/or simulated nodes. The MPDSC includes an I/O Switch which delivers I/O data between virtual and/or physical nodes, e.g., by using publish/subscribe mechanisms, thereby virtualizing physical I/O process data delivery. Nodes serviced by the I/O Switch may include respective component behavior modules that are unaware as to whether or not they are being utilized on a virtual or physical node. Simulations may be performed in real-time and even in conjunction with run-time operations of the plant, and/or simulations may be manipulated as desired (speed, values, administration, etc.).

Abstract: In some embodiments, a controller for a heating, ventilating and air conditioning (HVAC) system comprises an interface and a processor. The interface receives a comfort temperature set point and a sensed temperature for the enclosed space. The comfort temperature set point comprises a single set point used for both heating and cooling mode operation of the HVAC system. The processor determines a total error value based on comparing the sensed temperature and comfort temperature set point, selects a mode of operation based on the total error value, and operates the HVAC system in the selected mode of operation.

Abstract: A method for processing a digital signal comprises identifying a desired frequency and/or phase response that is represented in a frequency domain representation. A fractional order control system that models the desired frequency and/or phase response is constructed by assembling a first filter component from a filter component library and a second filter component from the filter component library. At least one filter component of the filter component library is defined by a Laplace function that includes a non-integer control order having a variable fractional scaling exponent and a value for the non-integer, variable fractional scaling exponent of the second filter component is based on a value of the non-integer, variable fractional scaling exponent of the first filter component. An input in the digital frequency domain is received and processed based upon the fractional order control system to generate a digital output. The output is then conveyed to a user.

Abstract: In one embodiment, the method includes obtaining device-related information corresponding to a plurality of devices from the device manager, selecting, for each first device, a second device matching each first device from among the at least one second device based on device-related information of the each device; determining corresponding device matching information based on the second devices matching the each first device, and sending the device matching information to the at least one second controller; wherein the device matching information includes one or more pairs of matching first device and second device.

Abstract: A closed-loop system may include a plant (an elctric machine requiring control) and a fractional-order proportional-resonant controller. The fractional-order proportional-resonant controller may have an order greater than zero and less than or equal to one. The order for the fractional-order proportional-resonant controller may be selected to yield a target amplitude and target slope for frequency response. The frequency response may be such that a steady-state error associated with a speed of the electric machine is inversely proportional to the target amplitude and less than a predetermined threshold. The order of the controller may be 0.9.

Abstract: A system for suppressing disturbances in a single-event transient susceptible (SET) signal includes an addition function, a subtraction function, an upper slew limiter, a lower slew limiter, and a magnitude limiter. The addition function adds the first offset to the SET susceptible signal to thereby generate an upper bound limit. The subtraction function subtracts the second offset from the SET susceptible signal to thereby generate a lower bound limit. The upper slew limiter limits the rate of change of the upper bound limit to thereby generate a rate limited upper bound limit. The lower slew limiter limits the rate of change of the lower bound limit to thereby generate a rate limited lower bound limit. The magnitude limiter prevents the magnitude of the SET susceptible signal from exceeding the magnitude of the rate limited upper bound limit and the magnitude of the rate limited lower bound limit.

Abstract: A method of setting the value of an operational parameter of a well is provided. The method includes providing a measure related to the actual value of the parameter; setting a maximum limit for the measure; setting a minimum limit for the measure; setting a demanded value for the parameter; and automatically overriding the demanded value if it is such that it would result in the measure exceeding the maximum limit or being below the minimum limit to produce an actual value for the parameter with results in the measure not exceeding the maximum limit and not being below the minimum limit.

Abstract: Disclosed illustrative embodiments include systems for part load control of electrical power generating systems and methods of operating a system for part load control of electrical power generating systems. A representative system includes a computer controller system operatively coupled to an electrical power generator and programmed to control a compressor inlet pressure responsive to a level of electrical power output requested of the electrical power generator, and a reservoir with supercritical fluid, responsive to the computer controller system and in fluid communication with the electrical power generating system between a compressor outlet and an expander inlet, and between an expander outlet and a compressor inlet.

Abstract: An embedded nonlinear cooperative pulse-controller (ENCPC) is characterized in that its control algorithm module comprises a comparison module, an identification control unit, a dynamic control unit, a steady-state control unit and a cooperative control unit. The comparison module generates control errors. The identification control unit identifies the model parameters, the time constant and the delay time. The dynamic control unit rapidly reduces the control errors, improves the rise time and decreases the overshoot of the control system. The steady-state control unit further eliminates the control errors in a steady change process and improves the control precision. The cooperative control unit coordinates and generates the final control output signal. The control algorithm module of the ENCPC enables that the ENCPC can quickly and stably eliminate the control errors with short rise time, small overshoot and short settling time.

Abstract: Example methods and apparatus to limit a change of a drive value in an electro-pneumatic controller are disclosed. A disclosed example method includes determining a slew limit of a controller based on noise in at least one of a control signal or a feedback signal, calculating a drive value based on the control signal and the feedback signal, and changing the calculated drive value if a difference between the drive value and a previous drive value is greater than the slew limit of the controller.

Abstract: Leak detectors can have a sensor configured to detect a presence of a working fluid externally of a liquid-based heat-transfer system. The leak detector can also have an electrical circuit configured to emit a signal responsive to a detected presence of the working fluid externally of the liquid-based heat transfer system. Methods of detecting a leak of a working fluid from a liquid-based heat-transfer system can include sensing a presence or an absence of a working fluid externally of a liquid-based heat-transfer system. The methods can include generating a tachometer signal in correspondence with a sensed absence and a sensed presence of the working fluid. The methods can include monitoring the generated tachometer signal.

Abstract: A system including a frequency shifted proportional-integral (PI) controller system utilizing input band-shifting, a PI control architecture and inverse band-shifting is disclosed. The frequency shifted PI controller system may eliminate errors and/or take control action based on past and present control errors. The feedback signal may be multiplied times sine of the theta position of the frequency of interest and the feedback signal may be multiplied times cosine of the theta position of the frequency of interest. Stated another way, the initial feedback signal is parsed into sine and cosine components at a particular frequency. This effectively band-shifts the feedback signal for treatment by the PI controller.

Abstract: A method for detecting a mechanical overload condition of an energized linear actuator to prevent commanding an activation signal to the linear actuator that may mechanically overload the linear actuator includes monitoring feedback variation of a movable element associated with the linear actuator including monitoring a present feedback signal of the movable element, monitoring a previous feedback signal of the movable element, comparing the present feedback signal and the previous feedback signal and determining the feedback variation based on the comparing. The feedback variation is compared to a feedback variation threshold. An input signal associated with the activation signal for controlling the linear actuator is monitored and the input signal compared to an input signal threshold. The electrical overload condition is detected when the feedback variation is less than the feedback variation threshold and the input signal is greater than the input signal threshold.

Abstract: In one implementation, an environmental controller operates a cooling system in an electronic device. The environmental controller includes a closed loop control system for operating a cooling fan at a target speed. The environmental controller may select the target speed based on one or more temperature sensors. The environmental controller may select the target speed based on the speeds of additional fans or the fans may be controlled in unison. The closed loop control system includes a proportional weight. When a measured cooling fan speed deviates from the target speed by more than a threshold error value, the proportional weight is constant. As the measured cooling fan speed approaches the target speed, and the threshold error value is crossed, the proportional weight is variable. The variance may be a function of time such as a periodic stair step function.

Abstract: A control system for using a predictive control with a control process having a time delay includes an adaptive feedback controller and a predictor. The predictor uses at least an adaptively updated control parameter from the adaptive feedback controller to predict the output of the control process during the time delay. The control system further includes a filter that dampens the rate of change of the adaptively updated control parameter provided to the predictor from the adaptive feedback controller to slow the adaptation of the predictor relative to the adaptation of the adaptive feedback controller.

Abstract: A variable impedance circuit is provided as an active load between an input line L1 and an output line L2. This circuit has low impedance with respect to a DC electric current signal and has high impedance with respect to an AC electric current signal, structured from a series circuit of resistors R1, R2, and R3 connected between lines L1 and L2; a transistor Q1 having the collector connected to the line L1 and the base connected between the resistors R2 and R3; a resistor R4 connected between the emitter of the transistor Q1 and the line L2; a capacitor C1 with one end connected between the resistors R2 and R3; a resistor R5 connected between the other end of the capacitor C1 and the line L2; a capacitor C2 having one end connected between the resistors R1 and R2; and a resistor R6 connected between the other end of the capacitor C2 and the line L2.

Abstract: A method for operating a firing plant with at least one combustion chamber and at least one burner, especially a gas turbine, includes an operating characteristic for operating the combustion chamber close to the lean extinction limit defined as a burner group staging ratio (BGVRich). Pressure pulsations (PulsActual) measured in the combustion chamber are processed by a filter device (2) and converted into corresponding signals (PulsActual,Filter(t)). An exceeding/falling short of at least one pulsation limiting value (PulsLimit) is monitored by a monitoring device (3) and adapts a pulsation reference value (PulsRef) in dependence upon the monitoring. The processed pressure pulsations (PulsActual,Filter(t)) are then compared with the adapted pulsation reference value (PulsRef,adapt), and, from this, a correction value ?BGV is determined, by which the burner group staging ratio (BGVRich) is corrected, and as a result operation of the firing plant close to the lean extinction limit is realized.

Abstract: A method for axis correction in a processing machine, in particular a shaftless printing machine, has at least one axis for processing and/or transporting a material, at least one detection device for detecting a processing parameter and at least one controller device for calculating a controller output variable for axis correction of the at least one axis using the detected processing parameter. The method is implemented iteratively, with the result that feedforward control output values for the feedforward control of the axis correction are determined during an (n+1)-th change in rotation speed of the at least one axis using observation of the controller output variable and/or the processing parameter during an n-th change in rotation speed of the at least one axis.

Abstract: Multiple designs, systems, methods and processes for controlling a system or plant using an extended active disturbance rejection control (ADRC) based controller are presented. The extended ADRC controller accepts sensor information from the plant. The sensor information is used in conjunction with an extended state observer in combination with a predictor that estimates and predicts the current state of the plant and a co-joined estimate of the system disturbances and system dynamics. The extended state observer estimates and predictions are used in conjunction with a control law that generates an input to the system based in part on the extended state observer estimates and predictions as well as a desired trajectory for the plant to follow.

Abstract: A hot water heater, and method of regulating the same, which includes a PID control. The PID control is responsive to inputs such as water temperature in the hot water heater and the flow rate of water such as through inlets and outlets coupled to the hot water heater. In one embodiment, the PID control generates an output that modifies the operating parameters of a heating device to accommodate changes in the temperature of the fluid in the hot water heater. The output results from one or more modules of a three-term control structure, wherein the modules comprise one or more of a proportional control module, an integral control module, and a derivative control module. Each of the modules is assigned at least one term, wherein the term is defined in accordance with gain parameters such as a proportional gain, an integral gain, and a derivative gain.

Abstract: Provided are an output feedback frequency control device and a speed governor using the same. The output feedback frequency control device includes an integral control unit configured to generate an integral control signal by using a predetermined integral control constant (KI) and an integral quantity of an angular velocity deviation (??) of an external device, a differential control unit configured to generate a differential control signal by using a predetermined differential control constant (KD), the angular velocity deviation (??) of the external device, and the mechanical power (?Pm) of the external device, and a proportional control unit configured to generate a control input (u) for control of an operation speed of the external device by using the angular velocity deviation of the external device, the integral control signal generated by the integral control unit, the differential control signal generated by the differential control unit, and a predetermined control constant (R).

Abstract: A device for adjusting a signal normally provided by a proportional plus integral (PI) control module to a process system includes a processing circuit configured to modify the signal of the PI control module by exaggerating the rate of change of the signal and an output for providing the modified signal to the process system.

Abstract: An automatic exposure (AE) controlling device and method are provided. According to the method, an electric shutter (ES) value and an analog gain control (AGC) value can be calculated through a proportional integral control method according to a brightness value of an inputted image frame. Then, AE compensation on a present image frame can be performed using the calculated ES value and AGC value.

Abstract: A vehicle control device calculates an operation amount and a motion state amount for varying an operation amount necessary for a real vehicle's operation based on a dynamic vehicle model modeling the motion state of a vehicle running in accordance with running targets such as a target path and a speed pattern and determines whether the calculated operation amount and the motion state amount satisfy prescribed running requirements. The operation amount and the motion state amount determined to satisfy the running requirements are a feed-forward (FF) operation amount and a target state amount in a state feedback (FB) control, respectively.

Abstract: A system and method is disclosed for calibrating a semiconductor wafer handling robot and a semiconductor wafer cassette. A robot blade boot is attached to a robot blade of the semiconductor handling robot. The robot blade boot decreases a value of tolerance for the robot blade to move between two semiconductor wafers in the semiconductor wafer cassette. In one embodiment the vertical tolerance is decreased to approximately twenty thousandths of an inch (0.020?) on a top and a bottom of the robot blade boot. The use of the robot blade boot makes the calibration steps more critical and precise. The robot blade boot is removed from the robot blade after the calibration process has been completed.

Abstract: Provided is an easy to use valve controller designed to obtain optimum operation performance. The valve controller is designed to control the valve opening of an expansion valve by calculating the valve opening such that a detected temperature coincides with a target temperature. The valve controller includes an automatic for calculating a deviation between the detected temperature and the target temperature and for calculating a changing amount of the valve opening by substituting at least the deviation and a set control parameter into an arithmetic expression to automatically set the control parameter. The valve controller further includes and control level adjuster for adjusting a magnitude of the valve opening calculated with the control parameter set by the automatic tuning means in stages in accordance with a set control level.

Abstract: A flow control valve includes a housing that includes a fluid inlet, a fluid outlet, a first work port and a second work port. The housing defines a spool bore and a pilot spool bore. A main stage spool is disposed in the spool bore. A pilot stage spool is disposed in the pilot spool bore. The pilot stage spool is in selective fluid communication with the main stage spool. A microprocessor includes a controller having a restricted structured controller and a compensation controller. Outputs of the restricted structured controller and the compensation controller are summed to form an electrical signal that is communicated to the pilot stage spool.

Abstract: Multiple designs, systems, methods and processes for controlling a system or plant using an extended active disturbance rejection control (ADRC) based controller are presented. The extended ADRC controller accepts sensor information from the plant. The sensor information is used in conjunction with an extended state observer in combination with a predictor that estimates and predicts the current state of the plant and a co-joined estimate of the system disturbances and system dynamics. The extended state observer estimates and predictions are used in conjunction with a control law that generates an input to the system based in part on the extended state observer estimates and predictions as well as a desired trajectory for the plant to follow.

Abstract: A process is proposed for continuously operating a plant for preparing acetylene from hydrocarbons by partial oxidation, cleavage in an arc or pyrolysis of hydrocarbons to obtain a reaction gas mixture which is conducted through one or more compressors, the pressure of the reaction gas mixture on the suction side of the compressor being controlled within a predefined range by means of a conventional controller, which comprises additionally using a higher-level model-supported predictive controller which reacts to abrupt changes in the mass flow rate of the reaction gas mixture.

Abstract: A door operator for controlling operation of a door, the door operator having a motor to open the door against a spring force, the door operator further comprising a door position sensor for transmitting a signal indicative of door position; and among other things, calculates a door moment of inertia based on a net torque and the time for the door to reach a predetermined angle from the closed position. Also provided is a door operator that compares door speed to a desired door speed based on a door speed-position profile and generates a door speed error signal and minimizes the door speed error signal by adjusting the braking load resulting from charging a chargeable battery using the motor as a generator.

Abstract: Different circuit-based implementations of stochastic anti-windup PI controllers are provided for a motor drive controller system. The designs can be implemented in a Field Programmable Gate Arrays (FPGA) device. The anti-windup PI controllers are implemented stochastically so as to enhance the computational capability of FPGA.

Abstract: A process is proposed for continuously operating a plant for preparing acetylene from hydrocarbons by partial oxidation, cleavage in an arc or pyrolysis of hydrocarbons to obtain a reaction gas mixture which is conducted through one or more compressors, the pressure of the reaction gas mixture on the suction side of the compressor being controlled within a predefined range by means of a conventional controller, which comprises additionally using a high-level model-supported predictive controller which reacts to abrupt changes in the mass flow rate of the reaction gas mixture.

Abstract: A device for adjusting a signal normally provided by a proportional plus integral (PI) control module to a process system includes a processing circuit configured to modify the signal of the PI control module by exaggerating the rate of change of the signal and an output for providing the modified signal to the process system.

Abstract: Various methods and systems for the parametric control of a process include representing the process with a process model used to generate future predictions of a process variable. In one embodiment, the process exhibits integrating behavior that is represented by a non-integrating process model. In another embodiment, an inverse of the model is filtered using a filter that includes a lead time constant that is selected to minimize a steady state error of the predicted process variable. In yet another embodiment, an array of output model values is revised or reindexed in response to a change in a time-varying parameter related to the process.

Abstract: A method for controlling a process variable as it approaches a predetermined value (setpoint) so that the setpoint is not exceeded. The method employs a time domain polynomial equation in a feedback configuration and utilizes a controller that acts as an On/Off controller until the process variable approaches setpoint. As the process variable approaches setpoint, the controller acts as a fast responding analog controller thereby “tailoring” a control variable to precisely bring the process variable to the setpoint without exceeding or overshooting the setpoint.

Abstract: The invention relates to a method for guiding the displacement of a displaceable machine element (18) in a machine, comprising the following steps: a) specification of a guide target variable (xtarg) that describes the desired displacement operation of the machine element (18); b) determination of a pilot actual variable (Mpilot) and/or a guide actual variable (xact) from the guide target variable (xtarg) using a model (2), said model (2) comprising a path model (3), which simulates the dynamic behaviour of the elements (16, 18) involved in the displacement. The invention also relates to a device that corresponds to the method. The invention permits the optimised guidance of the displacement of a displaceable machine element (18) in a machine.

Abstract: A target turning angle calculation part 51 calculates a target turning angle ? on the basis of a steering angle ? and a vehicle speed V. A correction turning angle calculation part 52 calculates a transfer function K(s) which is a second transfer function, depending on the vehicle speed V, by using a difference between a transfer function G(s) which is a first transfer function determined on the basis of the specification of the vehicle and a stationary component G(0) of the transfer function G(s), the first transfer function having as an input a turning angle ? and as an output a yaw rate ? of the vehicle, the second transfer function having as an input a target turning rate ?*? obtained by temporally differentiating the target turning angle ?* and as an output a correction turning angle ?c. The correction turning angle calculation part 52 calculates a correction turning angle ?c by multiplying the transfer function K(s) by the target turning rate ?*?.

Abstract: An automatic exposure (AE) controlling device and method are provided. According to the method, an electric shutter (ES) value and an analog gain control (AGC) value can be calculated through a proportional integral control method according to a brightness value of an inputted image frame. Then, AE compensation on a present image frame can be performed using the calculated ES value and AGC value.

Abstract: An electric power steering apparatus includes a driving target value setting unit for setting a driving target value of an electric motor; a steering acceleration detecting unit for detecting or estimating a steering acceleration; a correction amount computing unit for computing a control correction amount in accordance with the steering acceleration; a vehicle acceleration detecting unit for detecting an acceleration of a motor vehicle; an acceleration adaptive gain setting unit for setting a gain in accordance with an acceleration of a motor vehicle; a multiplication unit for determining a gain adjusted control correction amount by multiplying the control correction amount with the acceleration adaptive gain; a correcting unit for correcting the driving target value on the basis of the gain adjusted control correction amount; and motor driving units for driving the electric motor on the basis of the corrected driving target value.

Abstract: The invention relates to a closed-loop control system for a controlled system for specifying at least one controlling variable to the controlled system, having a primary controller, for generating the controlling variable within an interval between a maximum controlling variable barrier and a minimum controlling variable barrier. At least one measuring means for determining a controlled variable of the controlled system is provided. At least one measurement system for ascertaining at least one state variable of the controlled system, and at least one secondary controller, for varying the maximum controlling variable barrier and the minimum controlling variable barrier as a function of the state variable are provided.

Abstract: A control system used to control a controlled plant includes a main control unit, a first tuning unit, and a second tuning unit. The control system regulated by two weighting parameters of a first multiple and a second multiple, robustness and rapid response are attained, and excess of the output signal the controlled plant generates disappears or approaches zero. The control system has technical features of objective bandwidth, offsetting of low frequency disturbance, and matching of transfer functions. By designing the main control unit, the first tuning unit, and the second tuning unit, regulating the two weighting parameters of the first multiple and the second multiple, and tuning the actual system, the above technical features are obtained.

Abstract: A digital proportional integral loop filter is provided. A first proportional amplification unit multiplies a phase error value by a first proportional loop gain, and a first integral amplification unit multiplies a phase error accumulation value by a first integral loop gain. A second proportional amplification unit multiplies the phase error value by a second proportional loop gain, and a second integral amplification unit multiplies the phase error accumulation value by a second integral loop gain. A first offset value generation unit generates a first offset value by subtracting the second proportional loop gain from the first proportional loop gain and multiplying a resulting value by a phase error average value, and a second offset value generation unit generates a second offset value by subtracting the second integral loop gain from the first integral loop gain and multiplying a resulting value by a phase error accumulation average value.

Abstract: A method for tuning a fractional-order proportional-integral (PI) controller C ? ( s ) = K p ? ( 1 + K i ? 1 s ? ) includes deriving values for Kp, Ki, and ? that satisfy a flat phase condition represented by ? ? ? G ? ( s ) ? s ? ? s = jw c ? = ? ? ? G ? ( s ) ? s = jw c . Kp is derived to ensure that a sensitivity circle tangentially touches a Nyquist curve on a flat phase. Ki and ? are derived to ensure that a slope of a Nyquist curve is approximately equal to the phase of an open loop system at a given frequency.

Abstract: A method to determine and apply PI gain constants to an HVAC PI controller used to control an HVAC component includes the steps of: recording an opened loop HVAC component dynamic step response; fitting the HVAC component dynamic response to a transfer function model; calculating the PI gain constants from the model; entering the calculated PI gains into a PI control algorithm; and running the PI control algorithm on the HVAC PI controller to control the HVAC component. The inventive method can be used with an HVAC system comprising, an HVAC system component; an HVAC system component controller electrically connected to the HVAC system component to control the operation of the HVAC system component; and a PI algorithm. The PI algorithm uses PI gain constants calculated from the open loop transfer function of the HVAC system component.

Abstract: A controller and associated methods. A controller has an input for a controlled variable; a proportional term; an integral term; and a predictive term. The predictive term has an error-predictive subterm including at least a past value of an error; and a command-predictive subterm including at least one past value of a control command value; and an output. The controller can apply the predictive term and at least one of the proportional term and integral term to generate a command for the output. A method for controlling a process variable is also provided including applying a predictive term having an error-predictive subterm that includes at least a past value of an error and a command-predictive subterm that has at least a past value of a control command. The method further includes the step of generating a command based on the results of the applying the terms.

Abstract: A control device for a plant includes a manipulation signal generation section for generating the manipulation signal to the plant, a model adapted to simulate a characteristic of the plant, a learning section for generating an input signal of the model so that an output signal obtained by the model simulating the characteristic of the plant satisfies a predetermined target, a learning signal generation section for calculating a learning signal in accordance with a learning result in the learning section, a manipulation result evaluation section for calculating a first deviation as a deviation between a first measurement signal of the plant obtained as a result of application of a certain manipulation signal to the plant and a target value of the measurement signal, and a second deviation as a deviation between a second measurement signal of the plant obtained as a result of application of an updated manipulation signal to the plant and the target value, and a correction signal generation section for generati

Abstract: A technique for reducing excessive motor vehicle roll angle using a feedforward control comprises a number of steps. Initially, a steering angle and a speed of the-motor vehicle are determined. Next, a lateral acceleration of the vehicle is estimated based on the steering angle and the speed. Then, a lateral acceleration proportional and derivative (PD) term of the estimated lateral acceleration is determined and roll angle reduction is implemented when the lateral acceleration PD term exceeds a first threshold. The roll angle reduction may be achieved through application of a braking force to an outside front wheel of the vehicle. A magnitude of the braking force may be proportional to a difference between the lateral acceleration PD term and the first threshold.

Abstract: For a weighting circuit for adjusting a feedback control loop to an input signal of the feedback control loop the feedback control loop comprises a system under control and a device for generating a control difference signal by subtracting a weighted feedback signal from the input signal. The control difference signal is fed to the system under control which generates an output signal. The output signal is multiplied, by means of a weighting circuit by a sequence of multiplication factors for generating the weighted feedback signal. A frequency bandwidth of the feedback control loop is reduced step by step by the sequence of multiplication factors.

Abstract: A method for operating a firing plant with at least one combustion chamber and with at least one burner for producing hot gas, especially a gas turbine, preferably of a power generating plant, includes an operating characteristic for operating the combustion chamber close to the lean extinction limit defined in the form of a burner group staging ratio (BGVRich). The pressure pulsations (PulsActual) which are measured in the combustion chamber are processed by a filter device (2) and converted into corresponding signals (PulsActual,Filter(t)). An exceeding/falling short of at least one pulsation limiting value (PulsLimit) is monitored by a monitoring device (3) and adapts a pulsation reference value (PulsRef) in dependence upon the monitoring.