Abstract: Systems and methods for increasing sensor resolution using interpolation are described. One described method includes receiving an analog sensor signal associated with a coding surface; deriving a quadrature signal based at least in part on an analog threshold voltage associated with the analog sensor signal; determining a velocity and a derived quadrature position of the coding surface based at least in part on the quadrature signal; outputting the derived quadrature position of the coding surface if the velocity exceeds a velocity threshold; and determining and outputting an interpolated position of the coding surface using analog interpolation if the velocity is less than or equal to the velocity threshold.

Abstract: A reduced order model called the Fundamental Mistuning Model (FMM) accurately predicts vibratory response of a bladed disk system. The FMM software may describe the normal modes and natural frequencies of a mistuned bladed disk using only its tuned system frequencies and the frequency mistuning of each blade/disk sector (i.e., the sector frequencies). The FMM system identification methods—basic and advanced FMM ID methods—use the normal (i.e., mistuned) modes and natural frequencies of the mistuned bladed disk to determine sector frequencies as well as tuned system frequencies. FMM may predict how much the bladed disk will vibrate under the operating (rotating) conditions. Field calibration and testing of the blades may be performed using traveling wave analysis and FMM ID methods. The FMM model can be generated completely from experimental data. Because of FMM's simplicity, no special interfaces are required for FMM to be compatible with a finite element model.

Abstract: A method and apparatus for resolving individual signals in detector output data, the method comprising determining a signal form of signals present in the data, making parameter estimates of one or more parameters of the signals, wherein the one or more parameters comprise at least signal temporal position, and determining the energy of the signals from at least the form and the parameter estimates.

Abstract: Equipment extracts components of spatial frequency that need to be evaluated in manufacturing a device or in analyzing a material or process out of edge roughness on fine line patterns and displays them as indexes. The equipment acquires data of edge roughness over a sufficiently long area, integrates a components corresponding to a spatial frequency region being set on a power spectrum by the operator, and displays them on a length measuring SEM. Alternatively, the equipment divides the edge roughness data of the sufficiently long area, computes long-period roughness and short-period roughness that correspond to an arbitrary inspection area by performing statistical processing and fitting based on theoretical calculation, and displays them on the length measuring SEM.

Abstract: Techniques and devices are described to use spatially-varying curvature information of a layered structure to determine stresses at each location with non-local contributions from other locations of the structure. For example, a local contribution to stresses at a selected location on a layered structure formed on a substrate is determined from curvature changes at the selected location and a non-local contribution to the stresses at the selected location is also determined from curvature changes at all locations across the layered structure. Next, the local contribution and the non-local contribution are combined to determine the total stresses at the selected location.

Abstract: A method for calibrating a projective camera is provided. The method includes acquiring information by detecting at least one object on a substantially flat ground plane within a field of view. A projective camera calibration is performed. A measurement uncertainty is considered to yield a plurality of camera parameters from the projective camera calibration.

Abstract: An apparatus and method for providing a reference voltage for regulating voltage levels. The apparatus includes a first voltage generation system configured to receive a first control signal and output a calibration voltage, a voltage adjustment system configured to receive the calibration voltage and a reference voltage and output a second control signal, and a second voltage generation system configured to receive the second control signal and output the reference voltage. The voltage adjustment system includes a latch system configured to receive a third control signal and a fourth control signal and output the first control signal.

Abstract: An apparatus and method for PAPR reduction in a wireless communication system are provided. In the PAPR reducing apparatus, a first calculator calculates an ISF for each sample of baseband sample data. A successive peak detector adjusts the ISF of the each sample according to the spacing between successive peak samples. A second calculator subtracts the ISF of each sample received from the successive peak detector from a predetermined value. A window convolution calculator calculates a convolution of the difference received from the second calculator and a predetermined window function, and outputs a window operation value of each sample.

Abstract: Flowmeters are described in which a sensor signal received from a sensor that is attached to vibratable flowtube, so as to determine properties of a fluid within the flowtube, contains a drive signal component and a coriolis mode component. The flowmeters are operable to determine drive parameters of the drive signal component, as well as coriolis parameters of the coriolis mode component. By analyzing the sensor signal based on the drive signal parameters, and not on the coriolis signal parameters, the flowmeters are able to provide stable and accurate determinations of the properties of the fluid.

Abstract: A sample testing system may include a housing, a cavity in the housing to receive a chamber, two contact members, and a sensor. The contact members may be positioned to be engageable with respective portions of the chamber inserted in the cavity, and to compress those respective portions, thereby driving fluid flow. A sample testing system may include a housing, a cavity in the housing to receive a chamber, at least one contact member, and a sensor. The at least one contact member may be positioned to be engageable with a first segment of the chamber when the chamber is in the cavity, and to compress the first segment, thereby defining a gap of the first segment of the chamber and a reservoir in at least a second segment of the chamber.

Abstract: A system and method for combining conclusions from multiple fault detection techniques to isolate likely faults in a turbine engine is provided. The system and method provide the ability to effectively deal with multiple concurrent faults in the engine. Additionally, the embodiments of the invention provide the ability to correctly characterize multiple conclusions generated from evidence having different levels of interdependence. In one embodiment, the conclusions based on device data with high dependency are aggregated using a high dependency aggregation rule, and the resulting high-dependency sets are then further aggregated using a weak dependency rule. Finally, any conclusions based on independent evidence can be aggregated using an independent combination rule. The resulting aggregation determines which fault(s) are most likely indicated by the plurality of conclusions, taken into account the dependency of the device data used to generate the conclusions.

Abstract: A clearance measurement system is provided. The clearance measurement system includes a reference geometry disposed on a first object having an otherwise continuous surface geometry and a sensor disposed on a second object, wherein the sensor is configured to generate a first signal representative of a first sensed parameter from the first object and a second signal representative of a second sensed parameter from the reference geometry. The clearance measurement system also includes a processing unit configured to process the first and second signals to estimate a clearance between the first and second objects based upon a measurement difference between the first and second sensed parameters.

Abstract: A system and methods for calibrating a memory device are provided. More specifically, a technique for internally generating a test pattern within a memory device and driving the test pattern to a memory controller for synchronization and calibration is provided. An internal test pattern may be generated along the write bus within a memory device, employing elements already present for high speed memory devices. The test data may be looped back from the write bus to the read bus and transmitted to the memory controller for calibration. The loop back function may be implemented without accessing the memory array.

Abstract: A method and apparatus for measuring a parameter of a flow passing through a pipe is provided, wherein the apparatus includes at least two spatial array of sensors disposed at different axial locations along the pipe, wherein each of the sensors provide a signal indicative of unsteady pressure created by coherent structures convecting with the flow within the pipe at a corresponding axial location of the pipe. The apparatus also includes a signal processor configured to determine the flow rate at the circumference location of each sensor array in response to the respective measured unsteady pressures. The signal processor compares the velocity of the flow at each respective location and provides a signal indicative the presence of solids settled at the bottom of the pipe and/or the level of the settled solids in the pipe, in response to an uncharacteristic increase in the velocity of a lower portion of the flow in comparison to the velocity measured above the lower portion of the flow.

Abstract: Method and system of measuring and optimization of noise in a servo system. The method and system including features to optimize filtering otherwise reducing noise in the system so as to permit improved system operation.

Abstract: A system for load testing an integrated enterprise computer system is provided. The system uses a forecast that predicts future use of the integrated enterprise computer system. The forecast maintains a predicted volume of transactions and a predicted mix of transactions for the integrated enterprise computer system. The system includes an application list that details front-end applications of the integrated enterprise computer system. The application list identifies whether the front-end applications will participate in the load testing. The system further includes a generator to generate a test data file having transactions randomly used by scripts to test the integrated enterprise computer system. The generator produces the test data file using the predicted volume and mix of transactions maintained by the forecast and based on the front-end applications participating in the load test. A method for load testing using the test data file is also provided.

Abstract: A method and apparatus that allow packet based communication transactions between devices over an interconnect bus to be captured to measure performance. Performance metrics may be determined by capturing events at various locations as they pass through the system. Performance may be verified at run time by computing performance metrics for captured events and comparing such metrics to predefined performance ranges and/or self learned performance ranges. Furthermore, embodiments of the present invention provide for dynamic tailoring of bus traffic to generate potential failing conditions. For some embodiments, performance verification as described herein may be performed in a simulation environment.

Abstract: Apparatus and methods are provided for reducing coherent noise in measurements of repetitive analog signal waveforms by digital signal averagers. Coherent noise is repetitive and synchronous with the signal waveform and is therefore undiminished by conventional signal averaging techniques. A major source of coherent noise is the repetitive voltage transitions that occur within the digital signal averager itself. The apparatus and methods of the present invention introduce a known and variable phase offset during the signal averaging process between the signal waveform being measured and the internally generated coherent noise, thereby allowing such coherent noise to be averaged, and therefore reduced, during the signal averaging process. Consequently, the apparatus and methods of the present invention allow greater signal-to-noise ratio and signal dynamic range than with the prior art.

Abstract: A method for determining acoustic parameters of a liquid (1) in a resonator arrangement having a resonator chamber (2) includes the following steps: acoustic excitation of the liquid in the resonator chamber (2) in such a way that a sequence of liquid resonances is excited in a frequency range in which the wall material of the resonator chamber (2) and/or associated transducers (6) have natural resonances with amplitude different from zero, and measurement of the associated resonance frequencies of the liquid in the resonator chamber (2); determining an observed deviation of the measured resonance frequencies from ideal resonance frequencies in an ideal resonator corresponding to the resonator chamber (2); calculating a simulation function (yk), which is a function of the acoustic parameters of the liquid (1) and represents calculated deviations of the resonance frequencies from the ideal resonance frequencies; adapting the calculated deviations to the observed deviations through variation of the acoustic par

Abstract: Methods and apparatus are described for characterizing the temporal-spatial properties of a dynamic fluid front within a mold space while the mold space is being filled with fluid. A method includes providing a mold defining a mold space and having one or more openings into the mold space; heating a plurality of temperature sensors that extend into the mold space; injecting a fluid into the mold space through the openings, the fluid experiencing a dynamic fluid front while filling the mold space with the fluid; and characterizing temporal-spatial properties of the dynamic fluid front by monitoring a temperature of each of the plurality of heated temperature sensors while the mold space is being filled with the fluid.