基于重复控制技术的航空静止变流器

针对航空静止变流器输出电压波形畸变的问题,提出了采用重复控制技术解决方案.重复控制的基本思想是控制理论中的内模原理,逐周期地消除控制误差.分析了重复控制补偿器的数学表达式;证明了重复控制系统的稳定性和收敛性;给出了控制器各环节参数的频域设计方法;并根据一台采用单极性倍频正弦脉宽调制(SPWM)的6kVA/50Hz/200V航空静止变流器的实际参数进行仿真验证.仿真结果表明了控制模型和参数设计方法的正确性,同时也验证了重复控制对解决逆变电源受基波整数倍周期性信号干扰或带非线性负载所造成的输出电压波形畸变是行之有效的.

Aeronautical static inverter based on repetitive control

Aimed at the voltage wave distortion of ASI(aeronautical static inverter),a scheme based on the repetitive control technique was proposed.The repetitive controller based on the theory of internal model produces correction signal based on the control error of the last cycle to eliminate the error in the latter cycle. The compensator of the ASI was analyzed,and its stability and convergence were proved.The design of control parameters in frequency domain was also presented.Simulation courses with the parameters were obtained from a SPWM(sinusoidal pulse width modulation) ASI.Simulation results show that the control model and design method of parameters are feasible,and also the concept to use the repetitive control approach to improve the wave distortion of ASI with non-linear loads or disturbed by periodic signal can be verified practically.