航空机电作动器的混合整流全状态反馈控制
收稿日期: 2015-07-08
修回日期: 2015-09-07
网络出版日期: 2015-09-23
Full-state feedback control of a novel hybrid rectifier applied to aircraft electric actuator load
Received date: 2015-07-08
Revised date: 2015-09-07
Online published: 2015-09-23
研究了一种适用于多电飞机供电系统的新型混合整流电路,并针对航空机电作动器负载特殊的用电特性,提出了一种基于全状态反馈的混合整流控制方法,在保证整流效果的同时,解决了负载功率短时大范围变化引起的直流电压不稳定问题。这种新型混合整流电路将二极管整流电路和脉宽调制(PWM)整流电路并联输出接负载,两者共同承担有功功率且比例可控,通过适当控制PWM电路达到网侧低谐波的目的,且当负载制动时,能量可以回馈交流侧电网。建立了混合整流器的线性化全状态数学模型,设计了基于线性二次型(LQR)最优化理论的全状态反馈控制策略。通过在MATLAB/Simulink下的建模与仿真,比较了全状态反馈控制方法与传统三状态反馈控制方法,并在机电作动器样机上进行了实验验证。仿真和实验结果表明,采用全状态反馈控制的新型混合整流方案对于功率大范围变化负载具有更好的控制性能。
白龙 , 孙楚 , 周元钧 . 航空机电作动器的混合整流全状态反馈控制[J]. 航空学报, 2016 , 37(6) : 1940 -1952 . DOI: 10.7527/S1000-6893.2015.0249
A novel hybrid rectifier is presented which is applied to more electric aircraft power source and full-state feedback control is proposed according to the characteristics of aircraft electric actuator. The control aims to solve the problem of big output voltage dip caused by wide-range rapid varying load. The novel hybrid rectifier structured by a diode rectifier in parallel with a pulse width modulation (PWM) rectifier can limit harmonic current effectively, and the PWM part of the hybrid rectifier can bear the active power output whose proportion can be controlled properly and energy can be fed back to aviation source when load is braking. Linear mathematical model of the hybrid rectifier is then established and full-state feedback control based on linear quadratic regulator (LQR) is proposed. Comparison is made between full-state feedback control and three-state feedback control based on the results of MATLAB/Simulink simulation and prototype experiment, which verifies the improved performance of the hybrid rectifier applied to wide-range varying load.
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