3 results about "Compensation algorithm" patented technology

The invention discloses a digital metro gauge dynamic detection system which includes an inspection trolley, a display, an information input terminal, a detection unit, a speed measuring unit, an alarm unit, a processor and a power supply, the display, the information input terminal and the detection unit are arranged on the inspection car, the speed measuring unit, the alarm unit and the processor are arranged in the inspection car, the power supply is used for power supply of the whole detection system; and the detection unit, the speed measuring unit, the alarm unit, the display and the information input terminal are respectively connected with the processor. The detection unit is used for detection of a tunnel section, the speed measuring unit is used for monitoring trolley speed, through preset limit information in a computer, mileage information can be automatically read, a corresponding clearance can be configured, automatic clearance switch can be realized, and by dynamic compensation algorithm in software, an accurate clearance can be measured even in movement.

The invention discloses a hysteresis modeling and end-to-end compensation method based on a gating cycle unit. Nonlinearity, memory characteristics and frequency correlation of the hysteresis effect are fully considered, a double-layer structure hysteresis model including a gating cycle unit and a back propagation neural network is designed, and complex characteristics of the hysteresis effect areaccurately described. Aiming at the problem of atomic force microscope imaging distortion caused by a hysteresis effect, the hysteresis model established by the invention is utilized to calculate theactual position of a scanning point in the forward and reverse scanning processes, and a more real sample morphology image is obtained by designing an improved Hermite interpolation method. Experimental results show that the hysteresis model established by the method is high in precision and strong in generalization ability, nonlinearity, memory characteristics and frequency correlation of the hysteresis effect of the piezoelectric actuator can be accurately simulated, and image distortion caused by the hysteresis effect can be effectively eliminated by utilizing a compensation algorithm designed by the model, so that the imaging quality of the atomic force microscope is improved.