Abstract: A vehicle control system, which is configured to obtain an index on the basis of a running condition of a vehicle and to change at least any one of a driving force control characteristic and a vehicle body support characteristic of a suspension mechanism in response to the index, is configured to acquire information associated with a friction coefficient of a road surface on which the vehicle runs, and to correct the at least any one of the driving force control characteristic and the vehicle body support characteristic, which is changed in response to the index, on the basis of the information associated with the friction coefficient of the road surface.

Abstract: A damping system for damping torsion vibrations of shafts in machines is provided. A torque sensor detects torsion vibrations. A magnetostrictive actuator device creates a mechanical counter-vibration and a control device registers a measurement signal of the torque sensor in a time-resolved manner and creates a phase-shifted signal for a counter-vibration and drives the actuator device. Further, a method for eliminating torsion vibration of shafts in machines with such a damping system is provided. The torsion vibration of the torque of the shaft is registered in a time-resolved manner, a phase-shifted signal is created for a counter-vibration, and a mechanical counter-vibration is created using at a magnetostrictive actuator device.

Abstract: A method, apparatus and computer-readable medium for reducing a vibration of a drill string in a borehole. A sensor of the drill string obtains one or more measurements of a parameter of the vibration. A processor determines at least one force for controlling the measured vibration from the measured parameter. At least one actuator applies the determined at least one force against the borehole wall to control the vibration of the drill string.

Abstract: There is proposed a control system and the like that can realize a CPG (Central Pattern Generator) network having high controllability. A control system (CPG network) includes a plurality of oscillation control devices (CPG) and one target signal generating device (rhythm generator (RG)). Each CPG and the RG are described by the Van der Pol equation, and an amplitude and a period of an output waveform are substantially independently controlled by an external signal. In order to control a phase difference between the CPGs, the period of each CPG is temporarily controlled through connections that are only conjunctions between the each CPG and the RG.

Abstract: An active vibration damper has a damping device arranged on a vibration-susceptible mechanical structure. A force can be injected directly into the vibration-susceptible mechanical structure with the damping device. A damping force which damps a vibration of the mechanical structure is determined by a control device of the active vibration damper with reference to an absolute movement of the mechanical structure in space. A damping drive of the damping device which is arranged on the mechanical structure is activated by the control device in accordance with the determined damping force such that the determined damping force is injected into the mechanical structure with the damping drive. The control device determines the damping force such that the damping force is proportional at all times to the instantaneous velocity of the mechanical structure.

Abstract: The described embodiments relate generally to control of rotational components in a computer system. In one embodiment, the rotational component includes a cooling fan assembly, the cooling fan assembly being controlled in accordance with resonant frequency avoidance data. The resonant frequency avoidance data being characteristic of the computer system such that when the cooling fan assembly operates in accordance with the resonant frequency avoidance data, the cooling fan assembly does not operate at a fan speed that is coincident with a natural resonant frequency of the computer system.

Abstract: The present invention relates to a method for controlling a vibration isolation system, and an active vibration isolation system for vibration-isolated support of lithographic devices, wafer handling systems, and/or scanning microscopes. For this purpose the following are provided: a number of vibration transducers for supplying sensor signals which are representative of vibrations; a number of actuators for vibration compensation which may be controlled by supplying actuator control signals; a control device which is designed for processing the supplied sensor signals to form the actuator control signals, wherein the vibration transducers have at least one geophone sensor as a first acceleration sensor for detecting vibrations in a first frequency range, and at least one second acceleration sensor, which is different from the first acceleration sensor, for detecting vibrations in a second frequency range which extends the first frequency range.

Abstract: A vibration damper assembly that can be attached and moved about a payload surface of a table. The vibration damper assembly includes a sensor and a damper located within a housing. The housing can be attached to the payload surface by one or more fasteners. An operator can move the vibration damper assembly to different locations of the payload assembly to optimize the damping function of the assembly.

Abstract: The present invention provides an interactive patient system comprising: apparatus; sensing means associated with the apparatus, the sensing means adapted to send, receive or identify a location signal; presence identification means associated with a region of a patient, the presence identification means adapted to send, receive or identify a location signal; and altering means adapted to alter a property of the apparatus in proximity to the presence identification means upon identification of an activity signal, thereby effecting an activity in the vicinity of the region of the patient, wherein the activity signal is associated with transmission or identification of at least one location signal as between the sensing means and the presence identification means. Also provided is a method for providing a directed response to a region of a patient.

Abstract: A vibration damper assembly that may be attached and moved about a payload or optical mount surface of an optical structure such as an optical table. The vibration damper assembly may include a sensor and an actuator that may be disposed within a housing. In some embodiments, the vibration damper assembly or components thereof may be incorporated into an optical structure in the form of an optical component to be disposed or mounted on an optical mount surface of an optical structure such as an optical table. Embodiments of the vibration damper system may include a controller in communication with the damper assembly Embodiments of the controller may use adaptive tuning, auto-ranging selection of gain factors and other features in order to optimize damping performance.

Abstract: A control apparatus for an apparatus that cleans the drum of a ready mixed concrete truck includes a CAN-bus control system that includes a nozzle lance position encoder, a boom position encoder, a human-machine interface, a programmable logic controller, and monitors for an engine, hydraulic valves, and pressure sensors. The nozzle lance position encoder includes a rotary encoder, a bi-directional motor, a nozzle lance including a nozzle adapted to discharge water under high pressure, and a swivel assembly to which the nozzle lance is mounted for reciprocating motion. The programmable logic controller enables an operator to control the range of oscillation of the nozzle lance by inputting a desired range of oscillation into the programmable logic controller. An operator can also control extension and retraction of an elongate boom by inputting a desired rate of extension and retraction into the programmable logic controller.

Abstract: Vibration in a mechanical system driven by a motor connected to a load is reduced by providing an angular position and an angular velocity of the motor to a linear feedback term and to a nonlinear feedback term. Outputs of the linear feedback term and the nonlinear feed term, and an optimal feedforward term determined off-line are summed to produce a summed signal, which is fed back to control a torque of the motor.

Abstract: Dynamic systems with moving parts, such as printers and image forming apparatuses, for example, can shake as a result of reaction forces related to carriage movement. The characteristics of the shake are related to the particular usage environment and, therefore, can be different for the same dynamic system used in different environments. When the shake of a dynamic system is characterized while the dynamic system is in its particular usage environment, the shake can be reduced, for example, based on a degree of control specified by an operator, for every use in that same environment through adjustments based on the characterization.

Abstract: In one embodiment, the disclosed method includes controlling operation of a machine system via actuators and a first set of signals received from sensors, receiving a second signal from a vibration sensor, calculating vibration parameters based on the second signal. The method further includes the steps of normalizing each of the vibration parameters and presenting the normalized vibration parameters in an operator interface. In another embodiment, the system includes a controller configured to receive sensor signals from a machine system and to control operation of the machine system via actuators. The system also includes a condition monitoring user interface configured to display normalized vibration parameters for the machine system.

Abstract: A periodic rotational vibration check for storage devices to compensate for varying loads is disclosed. A variable representing rotational vibration status is maintained in a rotational vibration log. The variable is processed to determine whether a storage device exhibits a rotational vibration issue. Workload analysis is performed to identify a change to the workloads run on physically separate hardware to resolve the rotational vibration issue and thus eliminate the need for more expensive hardware.

Abstract: Methods for modeling the secondary path of an ANC system to improve convergence and tracking during noise control operation, and their associated uses are provided. In one aspect, for example, a method for modeling a secondary path for an active noise control system is provided. Such a method may include receiving a reference signal, filtering the reference signal with an initial secondary path model to obtain a filtered reference signal, calculating an autocorrelation matrix from the filtered reference signal, and calculating a plurality of eigenvalues from the autocorrelation matrix. The method may further include calculating a maximum difference between the plurality of eigenvalues and iterating a test model to determine an optimized secondary path model having a plurality of optimized eigenvalues that have a minimized difference that is less than the maximum difference of the plurality of eigenvalues, such that the optimized secondary path model may be utilized in the active noise control system.

Abstract: A damping device includes a calculator calculating a pseudo vibration to cancel a source vibration transmitted from a vibration source to a position to be damped, using an adaptive control algorithm. The canceling vibration is generated according to the pseudo vibration. A vibration detector detects an error vibration remaining at the position. The adaptive control algorithm is adapted by learning to reduce the error vibration. A frequency recognizer recognizes a frequency of the source vibration from a signal related to the vibration source. The frequency of the vibration is used to determine a frequency of the pseudo vibration. A phase difference identifier identifies a phase difference between the error vibration and the canceling vibration according to the pseudo vibration, and a frequency corrector corrects, according to the phase difference, the frequency of the vibration to eliminate the phase difference.

Abstract: In a building equipped with a plurality of motion-enabled chairs such as a movie theatre, the vibration of the motion-enabled chairs adds up and may damage the foundation of the building especially at the resonance frequency. The present application describes a system and method for controlling the resulting vibration by introducing an alteration such as a delay or an inversion in the motion signals sent to the motion-enabled chairs. This delay causes the vibration of some motion-enabled chairs to be de-phased from the vibration of the other motion-enabled chairs. Whereby, the intensity (magnitude) of the resulting vibration is reduced. Control of the motion-enabled chairs may be done centrally through a central controller, or locally at selected motion-enabled chairs.

Abstract: A method of controlling an operation of an operating member from a first position to a second position, wherein an operating speed of the operating member is initially increased from zero while an acceleration value of the operating member is first increased from zero and then decreased to zero, and the operating speed is subsequently decreased while the acceleration value is first decreased from zero and then increased to zero, and wherein a derivative of the acceleration value of the operating member is controlled such that the derivative during an acceleration increasing time and the derivative during an acceleration decreasing time are asymmetric with respect to each other. Also disclosed in an operating device including the operating member and a control device having an asymmetric control portion configured to practice the control method.

Abstract: In one embodiment, the disclosed method includes receiving a user selection of a machine system type from a plurality of machine system types, where the system types corresponding to specific machine component combination. The method also includes configuring alarms based on the machine system type, configuring calculations of vibration parameters based on the machine system type, wherein the calculations are adjusted for the machine system type, and configuring diagnostic information based on the machine system type.

Abstract: Device and method for positioning a precision part on a turntable (130). The device (100) comprises at least two distance sensors (121.1, 121.2, 121.3), which operate in a contactless manner and are situated in a previously known configuration to a rotational axis (A1) of the turntable (130). The measurement axes (124.1, 124.2, 124.3) of the distance sensors (121.1, 121.2, 121.3) are radially oriented in the direction of the rotational axis (A1) so that the measurement axes (124.1, 124.2, 124.3) of the distance sensors (121.1, 121.2, 121.3) meet in a virtual measuring point (MV). The distance sensors (121.1, 121.2, 121.3) are connected to analysis electronics (200). Output signals (a.1, a.2, a.3) of the distance sensors (121.1, 121.2, 121.3) may be processed on the basis of the analysis electronics (200), in order to allow coaxial centering of the precision part (11) in relation to the rotational axis (A1) upon placement of the precision part (11) on the turntable (130).

Abstract: A structural optimization engine generates a response profile based on a vibrational analysis of a three-dimensional (3D) structure. The structural optimization engine determines whether the 3D structure complies with one or more design goals set for the 3D structure based on the response profile. When the 3D structure does not comply with the design goals, the structural optimization engine retrieves dependency data from a structure database. The dependency data indicates various dependencies between response characteristics included in the response profile and specific regions of the 3D model. Based on the dependency data, the structural optimization engine determines structural modifications that can be made to the 3D structure to bring the 3D structure into compliance with the design goals. A multi-axis computer-aided manufacturing unit then makes the structural modifications to the 3D structure.

Abstract: The invention is a system and method for automatically adjusting the resonance frequency of an energy absorbing device in response to a disruptive force. By configuring an energy absorbing device for automatic response tuning, utilizing a controller coupled to one or more sensors for processing a determination primarily based on sensing data, the natural period of an overall structure may be adjusted (i.e. increased or decreased) so that the acceleration response of the structure is decreased upon being subjected to a disruptive force, for example, high winds, a blast from an explosion, or a seismic force caused by an earthquake.

Abstract: An active vibration isolation and damping system (11) comprising a payload (12) that has to be isolated or damped, a vibration sensor (14) for detecting a vibration of the payload, an actuator (15) for moving the payload relative to a bearing body (13) supporting the payload, and a controller (16) for providing the actuator with a signal that is representative for the vibration. The system provides a solution for the tilting problem by applying a vibration sensor that has a low stiffness connection to the payload (12) for rotation along an axis (17) perpendicular to the gravitational force (18), and a high stiffness connection to the payload (12) for the vibration detectable with the vibration sensor.

Abstract: In a material handling system having a material feeder, a material container may be configured to discharge material to the material feeder and a process aid may be engaged with the material container, a method including determining a process indicator associated with a material flow characteristic of the feeder during operation of the feeder, determining a difference between the process indicator and an indicator threshold value, adjusting the operation of the process aid based on the value of the difference determined above between the process indicator and the indicator threshold value.

Abstract: A motor controller capable of detecting an oscillation of a feedback loop and performing gain adjustment while updating a gain value of a control unit is provided. The motor controller includes an electric motor, an operation-amount detector, a control unit, a machine, a disturbance signal generator which generates a sweep sine wave, a compensation-driving-force detector, a vibration calculator, an oscillation detector, a vibration storage, a simulated open-loop gain calculator, a gain changer, and an automatic gain changer, and detects an oscillation by processing a response signal in time series on the basis of a first threshold regarding to a magnitude of vibration and a second threshold regarding a frequency.

Abstract: A rotary wing aircraft including a vehicle vibration control system.

Abstract: A controller is provided that controls an actuator system having a plurality of actuators arranged to act on an object. The controller uses a gain balancing matrix to convert a first control signal, representing a set of forces desired to be provided to the centre of gravity of the object into a second control signal, representing an equivalent set of forces to be provided by the plurality of actuators. The system is further configured such that a first gain balancing matrix is used at a first frequency band and a second gain balancing matrix is used at a second frequency band.

Abstract: A vibration control apparatus includes a first spring mechanism to support a first object as part of a first system. To control vibration of the first object, a first actuator applies a force to the first object via a command value generated by a first computing based on an output of a detection system. The detection system includes a second spring mechanism to support a second object as part of a second system. A third spring mechanism supports a third object as part of a third system. The first displacement detector detects displacement of the third object relative to the second object. The third object is prevented from being displaced relative to the second object. A second natural frequency of the second system is higher than a first natural frequency of the first system, and a third natural frequency of a third system is higher than the first natural frequency.

Abstract: A kinetic feedback system for facilitating computer-human interaction includes a control member configured to be manipulated by a user, a sensor coupled with the control member, where the sensor is configured to measure a force applied to the control member due to a manipulation by the user upon the control member, an actuator configured to displace a portion of the system that is engaged by the user during system operation, and a processor coupled with the sensor and the actuator. The processor is configured with control process logic to receive signals from the sensor including information relating to forces applied to the control member by the user as measured by the sensor, control movement of an object within an environment based upon the measured forces applied to the control member by the user, and control the actuator to displace the portion of the system in response to a determination by the processor of a force being applied to the object by another object within the environment.

Abstract: A system and method reduce lateral movement of a car in an elevator system by detecting vibration of the car as a vibration signal. A damping coefficient for a feedback signal is determined according to the vibration signal and a state of the elevator system. A semi-active actuator is arranged between the car and a roller guide assembly. The semi-active actuator includes a rheological fluid, and flow characteristics of the rheological fluid are actuated according to the feedback signal to reduce the lateral movement of the car.

Abstract: The resonance frequency of a forced torsionally oscillating mirror MEMS device can be controlled in the presence of perturbations by means of a closed loop feedback device and method of using it. The method is implemented through a simple algorithm, implemented in either software or hardware, that maintains the condition of resonance, or another selected frequency, by recursively determining that the center of the driving voltage pulse is positioned at a point on the measured positional waveform of the oscillating system.

Abstract: To achieve improved frequency-response correction of a vibration-signal transmitter in a vibration isolation system, the invention proposes a method in which an analog sensor signal representing vibrations is generated through the use of a vibration-signal transmitter, this sensor signal is amplified for correcting frequency-dependent sensitivity of the vibration-signal transmitter, an actuator control signal is generated by processing the amplified sensor signal, and an actuator is controlled with the actuator control signal for counteracting the vibrations, wherein the amplification of the sensor signal includes first amplification through the use of an analog amplification stage and second amplification through the use of a digital amplification stage. The invention further proposes a correction device and also a vibration isolation system for carrying out the method.

Abstract: A vibration control system includes a mechanical system which generates vibration; a sensor configured to measure the vibration and generate a vibration signal thereof, and a processor configured: (a) receive a vibration signal from a sensor in a mechanical system; (b) model the vibration signal using a time-domain function; (c) adjust one of an amplitude coefficient and a phase coefficient of the modeled vibration signal; (d) output a control signal corresponding to the modeled vibration signal to the mechanical system so as to reduce the vibration; and (e) receive another vibration signal from the sensor. Steps (c)-(e) are repeated when the average value of the vibration signal is greater than a predetermined value. A method for vibration control is also disclosed.

Abstract: A rotary blade rotating hub mounted rotating assembly vibration control system (20) including a first imbalance mass concentration rotor (28), a second imbalance mass concentration rotor (44), a third imbalance mass concentration rotor (38?), and a fourth imbalance mass concentration rotor (44?). The first imbalance mass concentration rotor has a first imbalance mass concentration rotor center axis of rotation (136) centered on the rotating assembly center rotation axis (28). The second imbalance mass concentration rotor has a second imbalance mass concentration rotor center axis of rotation (142) centered on the rotating assembly center rotation axis. The third imbalance mass concentration rotor has a third imbalance mass concentration rotor center axis of rotation (136?) centered on the rotating assembly center rotation axis. The fourth imbalance mass concentration rotor has a fourth imbalance mass concentration rotor center axis of rotation (142?) centered on the rotating assembly center rotation axis.

Abstract: A digital system for controlling the quality factor in a resonant device. The resonant device can be any mechanically driven resonant device, but more particularly can be a device that includes a cantilever within its system, such as an atomic force microscope. The quality factor can be digitally controlled to avoid noise effect in the analog components. One of the controls can use a direct digital synthesizer implemented in a way that provides access to the output of the phase accumulator. That output is a number which usually drives eight lookup table to produce a cosine or sign output wave. The output wave is created, but the number is also adjusted to form a second number of the drives a second lookup table to create an adjustment factor. The adjustment factor is used to adjusts the output from the cosine table, to create an adjusted digital signal. The adjusted digital signal than drives a DA converter which produces an output drive for the cantilever.

Abstract: A method and apparatus for estimating the instantaneous rotational speed of a bottom hole assembly at the lower end of a drill string. In one embodiment, a method includes driving the drill string by a drilling mechanism at the upper end of the drill string. A fundamental frequency of stick-slip oscillations suffered by the drill string is estimated. Variations in a drive torque of the drilling mechanism are determined. Known torsional compliance of the drill string is combined with the variations in the drive torque. An output signal representing the instantaneous rotational speed is provided.

Abstract: A stage configuration is provided, wherein a ceramic plate is used as the z-stage body to decrease the use of the metal plates in the conventional configuration, so that the compact structure of the z-stage may decrease the vibrational movements of the z-stage. Further, two Laser interferometer are used to detect a movement of different points along a vertical line of the z-stage sidewall to calculate a movement of the specimen surface, so that a horizontal movement of the specimen surface can be detected more accurately.

Abstract: The vibration suppressing device includes vibration sensors, a FFT calculating unit, a store device, a calculating unit, and a NC device. The vibration sensors detect a time-domain vibrational acceleration of a rotary shaft during rotating. The FFT calculating unit calculates a frequency of chatter vibration and a frequency-domain vibrational acceleration in the frequency of chatter vibration on the basis of the detected time-domain vibrational acceleration. The store device stores the frequency-domain vibrational acceleration, the frequency of chatter vibration and the like as machining information.

Abstract: A digital processing link for a vibration control system collects sensor signals at a transfer station and combines the sensor signals into a collective signal that is transmitted under a digital communications protocol to a base station. The sensor signals are separated at the base station and individually processed to produce one or more output control signals to actuators for counteracting the measured vibration.

Abstract: A stable rotation speed is acquired by finely changing a rotation speed of a rotary shaft 3 based on an expected stable rotation speed, and calculating an amount of change of a k? number, and the like. Therefore, a more accurate rotation speed can be acquired, and “chatter vibration” generated during machining can be suppressed more effectively than a conventional method. As a result, a quality of a workpiece surface can be improved, and a tool wear and the like can be suppressed.

Abstract: One embodiment of the present invention provides a system actively cancels vibrations in a computer system. During operation, the system monitors vibrations in the computer system. Next, the system analyzes the vibrations to identify one or more harmonics in the vibrations. The system then actively cancels one or more of the identified harmonics.

Abstract: An apparatus is presented for monitoring the relative positions and/or for measuring and evaluating relative position in a system which contains at least two sub-systems. The apparatus has several devices, of which at least one device has a vibration-isolation device. Furthermore, at least one device is provided for determining the relative positions of the devices and one evaluation device is provided for testing whether the measured relative positions of the devices lie within a tolerance interval.

Abstract: A motor control system suppresses vibration of a machine base and achieves high-speed positioning without using a special sensor but using a model control system. A first feedback section outputs a first feedback command generated based on model machine base position information and containing at least position information on the machine base. A second feedback section outputs a second feedback command containing a filtered model torque command. A differential between the sum of the first feedback command and the second feedback command obtained by a second addition section and the model torque command is calculated to give the differential to an input portion of a model torque command low-pass filter and an input portion of a torque command low-pass filter.

Abstract: In a method for the compensation of rotor torque oscillations upon the occurrence of mains asymmetries in relation to a double-fed asynchronous machine (1) it is provided that at least one respective currently prevailing machine parameter is measured and/or derived, the at least one machine parameter is respectively decomposed by calculation into a positive and a negative sequence system component and optionally a DC component, and for the positive sequence system component, the negative sequence system component and optionally for the DC component of the at least one machine parameter, there are respective separate control members for controlling an adjusting value, to which the respective components of the machine parameters are fed as input components and the output values of which are additively superposed. In that case the control members are so adapted for controlling the adjusting value in such a way that the torque oscillations are counteracted.

Abstract: A method for controlling the cooling of an industrial plant with at least one electrical component, such as, for example, a transformer, and having at least one cooling element for cooling the electrical components, uses at least one sensor for measuring the temperature and/or the viscosity of the coolant in the cooling system. An optimal control of the cooling system can be provided by way of controlling the electrical components with selected control profiles taking into account specific data for the electrical components.

Abstract: This invention discloses an optical table and the vibration control method thereof. Using disturbance response decomposing techniques, a double-layer structure is applied to independently control the ground and load disturbances. This invention can simplify the vibration control and improve system performance.

Abstract: A system and method is provided for monitoring, collecting, storing, transmitting, calculating and uploading to a secure web server real-time balancing solutions for at least the N1 Low Pressure Compressor portion of a jet engine. The method comprises collecting a series of engine vibration data strings and transmitting a data string set to a ground stations for conditioning, formatting and forwarding to a source for calculating and providing fan balance solutions to a secure server wherein the data strings comprise at least phase angle of imbalance data, N1 RPM and the magnitude of the N1 vibration. The balance solution determined comprises the required weight (mass) and location of weight (mass) installation necessary to correct a fan imbalance in a turbine engine.

Abstract: A heat source side controller of an air conditioner has an operating mode allocator and an operating mode setter. The air conditioner has a heat source unit and a plurality of room units. The heat source unit can be switched among a plurality of operating modes having different noise-reduction levels. The operating mode allocator allocates one operating mode to each of the operating room units. The operating mode setter sets the heat source unit to one operating mode from among the plurality of operating modes on the basis of the operating modes allocated by the operating mode allocator to each of the operating room units. In cases in which a specific operating mode is allocated to all of the operating room units, the operating mode setter sets the heat source unit to the specific operating mode.

Abstract: A method for vibration avoidance in automated machinery produces actuator space-time contours that meet design objectives of the machinery while suppressing energy content at frequencies in the space-time contour, by concatenating multiple space-time contour segments together in such a way as to be mostly free of energy at the frequencies of interest while meeting other specified design goals. The segments used to construct these frequency-optimized-contours are a series of concatenated polynomial segments, the independent variable t being time. These segments can define the variable to be controlled (e.g. speed or distance) versus time, or define one of the controlled variable's time-derivatives (e.g., the slope of the speed vs. time, etc.).