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Fully decoupled Branch Energy Balancing control Method for Modular Multilevel Matrix Converter Based on Sequence Circulating Components

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 235-247页

作者： Zexin Zhao Weijiang Chen Zhichang Yang Guoliang Zhao Bin Han Yunfei Xu Nianwen Xiang Shulai Wang China Electric Power Research Institute Beijing 100192China State Grid Corporation of China Beijing 100031China State Grid Smart Grid Research Institute Beijing 102209China State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research InstituteBeijing 102211China Hefei University of Technology Hefei 230009China

The modular multilevel matrix converter(M3C)is a potential frequency converter for low-frequency AC ***,capacitor voltage control of high-voltage and largecapacity M3C is more difficult,especially for voltage balancing between *** solve this problem,this paper defines sequence circulating components and theoretically analyzes the influence mechanism of different sequence circulating components on branch capacitor voltage.A fully decoupled branch energy balancing control method based on four groups of sequence circulating components is *** method can control capacitor voltages of nine branches in horizontal,vertical and diagonal *** influences of both circulating current and voltage,a cross decoupled control is designed to improve control *** results are taken from a low-frequency transmission system based on PSCAD/EMTDC,and effectiveness and precision of the proposed branch energy balancing control method are verified in the case of nonuniform parameters and an unbalanced power system.

关键词： Branch energy balancing control decoupled control low-frequency AC transmission modular multilevel matrix converter(M3C) sequence circulating components

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On decoupled or coupled control of bank-to-turn missiles

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Science China(Information Sciences) 2015年第5期58卷 195-207页

作者： DUAN ZhiSheng HUANG Lin YANG JianYing QIN GuoZheng State Key Lab for Turbulence and Complex Systems and Department of Mechanics and Engineering Science College of Engineering Peking University

In this paper, the differences between decoupled and coupled control of bank-to-turn(BTT) missiles have been studied in detail from three aspects: stabilizability, linear quadratic regulator(LQR) control and tracking control. It is found that for some parameters the BTT missile can be controlled by a decoupled way,especially for stabilizability and LQR control. However, for some others, the BTT missile cannot be decoupled and a coupled control method is needed. Therefore, for a practical flight control system, the decouplability should be studied before giving a decoupled control method. In addition, in order to avoid the disadvantages of LQR control method, an improved H∞controller design method is given. Combined with tracking control problem, a new H∞control method is established for trajectory tracking.

关键词： BTT missile decoupled control coupled control tracking control

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Adaptive Fuzzy Sliding Mode control for decoupled Uncertain Underactuated Systems

Adaptive Fuzzy Sliding Mode Control for Decoupled Uncertain ...

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第三十九届中国控制会议

作者： ZHOU Zhen FU Lei XIAO Jinzhuang College of Electronic Information Engineering Hebei University

In this work, a decoupled adaptive fuzzy sliding mode control method for a class of underactuated systems with unknown terms is proposed. Firstly, the underactuated system is decoupled into two second-order subsystems, which are referred to the actuated and the underactuated parts, and the sliding manifold of the underactuated subsystem is implemented into the actuated subsystem through an inverse-tangent saturation function. Secondly, a sliding mode controller by decoupled method is designed. Then an adaptive fuzzy algorithm is presented to estimate the unknown terms of the system, moreover, the estimated upper bound of the fuzzy modeling error are solved by the adaptive algorithm. Finally, the stability analysis of th e closed-loop system is verified by the Lyapunov stability theory. Simulation results on the overhead crane system are given to show the effectiveness of the proposed method.

关键词： Underactuated systems decoupled control Adaptive fuzzy control Inverse-tangent saturation function Sliding mode control

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Adaptive Sliding-mode control Based On decoupled Method for A Class of Underactuated System

Adaptive Sliding-mode Control Based On Decoupled Method for ...

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第36届中国控制会议

作者： Guo Jun Su Qing Lin Gong Hui Yan Li School of Automation and Electrical Engineering Tianjin University of Technology and Education School of track and electrical Engineering Chongqing Vocational College of Public Transportation

ISBN: (纸本)9781538629185

An adaptive radial basis function neural network（RBFNN） sliding-mode controller with decoupled method was proposed for a class of underactuated system. Different sub-systems were devided according to the performance of the system, and the corresponding sub-sliding plane was designed for the sub-system;The RBFNN controller was designed for one of the sub-system, and its adaptive algorithm was derived by the reaching conditon, the sub-sliding planes were connected by the intermediate functions, the stability of the control system can be guaranteed when one of the sub-system was stable. At last, overhead crane transporting control was used to illustrate the rapidness and robustness of the proposed approach.

关键词： Underactuated system Sliding-mode control decoupled control Overhead crane

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A Novel Partial Decoupling control for Three-Tank Liquid Level System

A Novel Partial Decoupling Control for Three-Tank Liquid Lev...

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2021中国智能自动化大会(CIAC2021)

作者： Tao Xu Haisheng Yu Jinpeng Yu School of Automation Qingdao University

This work investigates a novel partial decoupled control based on Port-controlled Hamiltonian(PCH) model for three-tank liquid level system. Different from the traditional decoupling control, which is mainly in frequency domain, the method proposed in this paper is implemented directly in time domain. According to the specific requirements of liquid level system control objectives, partial decoupling control is realized by a simply transform. In order to prove the stability, PCH principle is introduced. The simulation results compared with the traditional PCH method illustrate the good performance of the proposed algorithm.

关键词： decoupled control Port-controlled Hamiltonian model Liquid level control system

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