48 results about "Inverse transfer function" patented technology

A diesel particulate filter (DPF) having an oxidation catalyst is disposed between exhaust pipes of an internal combustion engine. An exhaust gas temperature sensor senses outlet gas temperature of the DPF. An engine control unit (ECU) calculates estimated central temperature of the DPF from an output of the exhaust gas temperature sensor with the use of an inverse transfer function of a change in the outlet gas temperature with respect to a change in temperature of the DPF. Based on the estimated temperature, the ECU performs excessive temperature increase prevention control or regeneration control of the DPF. The transfer function is simply expressed with first-order lag and dead time. A time constant of the first-order lag and the dead time are set in accordance with an exhaust gas flow rate.

Brightness and color tone shift distortion of captured images by a non-ideal lens can be compensated by applying an inverse transfer function to the captured image. An estimate of the lens transfer function can be measured based on a radius from a center of the lens. The lens transfer function can be measured by capturing a flat field image. The center of the lens can be determined based on a relative brightness maximum. The relative brightness of the captured flat field image can then be measured as a function of radius to generate a lens response curve. Separate response curves can be measured for each color component. A correction curve can be determined as the inverse of the response curve. The correction curve can be applied to subsequent captured images to compensate for lens degradation.

An acoustic crosstalk canceller is determined for an asymmetric audio playback device, by determining a transfer function of an acoustic stereo playback path having asymmetries defined by speakers of the playback device. The transfer function is inverted to determine an inverse transfer function. The inverse transfer function is regularised by applying frequency dependent regularisation parameters to obtain an acoustic crosstalk canceller. Also, the inverse transfer function could be regularised for symmetric playback paths by applying aggregated frequency dependent regularisation parameters to obtain an acoustic crosstalk canceller without band branching.

A servo control apparatus improved in trackability without being accompanied by overshoots or any continuous vibration and capable of tracking without any delay from an upper order command is provided. A command signal is directly transmitted to a controller as a target command increment value. A compensation signal arithmetic unit receives the target command increment value, subtracts the target command increment value from a signal having passed through an inverse transfer function unit having an inverse transfer function characteristic of any low-pass filter, and sends a compensation signal generated by multiplying a result of that subtraction by an adjustment gain to a controlled object. The controller receives the target command increment value and an output increment value of the controlled object, and sends a control input to the controlled object so that the output of the target command becomes coincident with the target command.

A hand shake blur detecting apparatus for detecting hand shake blur of an imaging device based on an output signal of a hand shake blur sensor for detecting the hand shake blur of the imaging device is provided, the hand shake blur detecting apparatus including a high pass filter calculating means for removing low frequency component from the output signal of the hand shake blur sensor; an inverse high pass filter calculating means for performing on the output signal of the high pass filter calculating means, a filter calculation of an inverse transfer function of the high pass filter; an offset value calculating means for calculating the offset value based on the output data of the inverse high pass filter calculating means; and an offset value subtracting means for subtracting the offset value calculated by the offset calculating means from the output data of the inverse high pass filter calculating means.

A method for operating an integrated circuit tester information processing system includes: measuring current information from test structures for an integrated circuit having a stress liner; forming a transfer curve by simulating based on the current information with a first range of first mobility multipliers; forming an inverse transfer curve by applying an inverse transfer function to the transfer curve; forming a stress curve with second mobility multipliers from the inverse curve; and validating the second mobility multipliers by comparing a measured curve and a simulated curve with the measured curve based on the current information and the simulated curve based on stress curve.

The invention discloses an inverter repetitive control design method based on a neural network. The method includes the following steps: 1, analyzing that traditional transfer function of the inverterby using the control theory, selecting an appropriate control algorithm for the bottom control of the inverter, identifying the theoretical model offline by use the neural network algorithm, and obtaining the initial parameters of the model by selecting the basic structure of the model; 2, taking the obtained initial identification model as a reference for on-line identification learning, and obtaining the actual identification model of the traditional control closed loop of the inverter; 3, constructing an inverse transfer function by utilizing that identification model information to replace the repeat control compensation link; 4, storing that parameters of the identify model in real time, and importing the latest data of the learning model of the system every time the identification model is put into the device. The method of the invention saves a large amount of tedious work of parameter design and selection, avoids the influence of parameter drift on repetitive control, improvesthe stability and robustness of repetitive control links, and can be popularized and used in inverters and related fields.

The invention discloses a shock absorber state detection method and device, an automobile and a storage medium. The method comprises steps of determining an inverse transfer function according to preset white noise and a preset multi-body dynamic model; determining an automobile suspension displacement signal and a shock absorber force signal according to the acquired automobile driving data, thepreset multi-body dynamic model and the inverse transfer function; and determining a state of the shock absorber according to the automobile suspension displacement signal and the shock absorber forcesignal. The method is advantaged in that the automobile suspension displacement and the shock absorber force are determined through the inverse transfer function and the multi-body dynamic model, detection of the shock absorber in the whole automobile state is realized, and automobile driving safety is improved.