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Proportional integral derivative controller design using Legendre orthogonal functions

Journal of Central South University 2016年第10期23卷 2616-2629页

作者： Reza Moradi Mohammad Tabatabaei Department of Electrical Engineering Khomeinishahr Branch Islamic Azad University

The Legendre orthogonal functions are employed to design the family of PID controllers for a variety of plants. In the proposed method, the PID controller and the plant model are represented with their corresponding Legendre series. matching the first three terms of the Legendre series of the loop gain with the desired one gives the PID controller parameters. The closed loop system stability conditions in terms of the Legendre basis function pole(λ) for a wide range of systems including the first order, second order, double integrator, first order plus dead time, and first order unstable plants are obtained. For first order and double integrator plants, the closed loop system stability is preserved for all values of λ and for the other plants, an appropriate range in terms of λ is obtained. The optimum value of λ to attain a minimum integral square error performance index in the presence of the control signal constraints is achieved. The numerical simulations demonstrate the benefits of the Legendre based PID controller.

关键词： PID controllers orthogonal functions legendre functions moment matching PI controller PD controller

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Study on Method of Removing Stripe Noise in CBERS-02 Image

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Meteorological and Environmental Research 2010年第1期1卷 42-45页

作者：王文英周伟袁春刘顺喜周连芳杨红磊中国地质大学(北京)土地科学技术学院北京100083 土地勘测规划院北京100035

Based on the project of land macroscopical monitoring by CBERS,a remote sensing image of Arongqi in Inner Mongolia was studied by different methods such as histogram matching,principal component analysis,moment matching,low-pass filter and wavelet transform.A qualitative analysis and quantitative assessment was also carried *** results showed that wavelet transform could effectively remove stripe noise,and also kept its advantages in the *** matching had a better strip removal,but it changed features in its spectrum easily and it was not fit for CBERS-02 image *** component analysis could not remove stripe noise,but also strengthened it in a certain extent.

关键词： CBERS Stripe noise Stripe removing moment matching Wavelet transform China

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Symbolic Macromodeling for Statistical Simulation of Operational Amplifiers

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Journal of Electronic Science and Technology 2013年第3期11卷 272-276页

作者： Lan-Lan Dong Guo-Yong Shi Jian-Dong Cheng the EDA Research Lab School of Microelectronics Shanghai Jiao Tong University

Symbolic circuit simulator is traditionally applied to the small-signal analysis of analog circuits. This paper establishes a symbolic behavioral macromodeling method applicable to both small-signal and large-signal analysis of general two-stage operational amplifiers （op-amps）. The proposed method creates a two-pole parametric macromodel whose parameters are analytical functions of the circuit element parameters generated by a symbolic circuit simulator. A moment matching technique is used in deriving the analytical model parameter. The created parametric behavioral model can be used for op-amps performance simulation in both frequency and time domains. In particular, the parametric models are highly suited for fast statistical simulation of op-amps in the time-domain. Experiment results show that the statistical distributions of the op-amp slew and settling time characterized by the proposed model agree well with the transistor-level results in addition to achieving significant speedup.

关键词： Index Terms---Analog behavioral model large-signalanalysis moment matching operational amplifiers,process variation statistical analysis symbolic analysis.

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Efficient Interconnect Network Model for Linear Circuit Reduction

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Journal of Semiconductors 2003年第9期24卷 916-920页

作者：陈彬杨华中罗嵘汪蕙清华大学电子工程系北京100084

A new interconnect network model for linear netw ork reduction is *** this new model,the ports of the interconnect network are classified into two groups:active and passive *** the classification,some proprieties of the interconnect network are found to be redundant and pruned before *** common interconnect networks,the scale of reduced models is smaller than 50% of the scale of previous works.

关键词： moment matching MPVL process linear circuit reduction

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