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Robust adaptive cross-coupling position control of biaxial motion system

Science China(Technological Sciences) 2016年第4期59卷 680-688,1-3页

作者： CHEN Wei WANG DianDian GENG Qiang XIA ChangLiang School of Electrical Engineering and Automation Tianjin University Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy Tianjin Polytechnic University

The stability and synchronous performance are usually hard to be improved simultaneously in the biaxial cross-coupling position motion control *** on analyzing the characteristics of the cross-coupling control system,a robust adaptive cross-coupling control strategy is *** restrict influences of destabilizing factors and improve both of stability and synchronous performance,the strategy forces dual axes to track the same reference model using Narendra adaptive control *** then,a robust parameters adaptive law is *** stability analysis of the proposed strategy is conducted by applying Lyapunov stability *** simulations and experiments indicate that the proposed strategy can improve synchronous performance and stability simultaneously.

关键词： biaxial motion motor control system position tracking robust adaptive control cross-coupling synchronous error

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A new family of windows——convolution windows and their applications

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Science China(Technological Sciences) 2005年第4期48卷 468-480页

作者： ZHANG Jieqiu1,2, LIANG Changhong1 & CHEN Yanpu3 1. Department of Applied Math. & Phys., College of Science, Airforce Engineering University, Xi’an 710051, China 2. National Key Laboratory of Antennas and Microwave Technology, Xidian University, Xi’an 710071, China 3. Computer Center, Xi’an Communication College, Xi’an 710106, China Department of Applied Math. & Phys. College of Science Airforce Engineering University National Key Laboratory of Antennas and Microwave Technology Xidian University Computer Center Xi"an Communication College

A new family of windows is constructed by convolutions via a few rectangular windows with same time width and is thus referred to as convolution windows. The expressions of the second-order up to the eighth-order convolution windows in both the time and frequency domains are derived. Their applications in high accuracy harmonic analysis of periodic signals are investigated. Comparisons between the proposed windows and some known windows with the same width shows that, when the synchronous deviation of data sampling is slight, the proposed ones have the least effect of spectral leakage. Therefore, the new windows are well suited for high accuracy harmonic analysis and parameter estimation for periodic signals. The error analysis and computer simulations show that the estimation errors, corresponding to frequency, amplitude and phase of every harmonic component of a signal, are proportional to the pth power of the relative frequency deviation in case of the pth-order convolution window is applied to windowing signal of approximately p cycles. By introducing real time adjustment in sampling interval, the proposed algorithm can adaptively trace signal frequency and lead to less sampling synchronous deviation. The proposed approach has the advantages of easy implementation and high measure precision and can be used in harmonic analysis of quasi-periodic signals whose fundamental frequency drifts slowly with time.

关键词： signal processing harmonic analysis window function convolution window synchronous error spoctral leakage

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Analysis and Simulation of errors in Software synchronous Sampling in Periodic-Signal Measurement

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Journal of Southeast University(English Edition) 2000年第1期16卷 57-63页

作者：马宏忠胡虔生东南大学电气工程系

Software synchronous sampling is widely employed in periodic signal measurement, but measurement errors occur very commonly. This paper analyses the cause of the errors, deduces the mathematical model for the measurement errors in measuring RMS voltage, RMS current and active power using the software synchronous sampling method. Some measures to reduce the errors are put forward by simulating.

关键词： synchronous sampling synchronous error measurement

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