永磁同步交流牵引系统LQG／LTR控制研究

针对永磁同步交流牵引系统运行过程中存在参数扰动及传感器量测噪声的影响,采用线性二次高斯/回路传输恢复(LQG/LTR)鲁棒控制技术,设计了基于LQG的系统控制器,通过LTR技术优化系统控制器设计,完成参数扰动时的控制性能仿真。仿真结果表明,在参数扰动±5%时,系统具有较强的鲁棒性。提出了基于DSP平台的永磁同步交流牵引LQG/LTR控制系统实现方案。试验结果表明,在系统噪声和测量噪声存在的情况下,使用LQG/LTR控制器的交流永磁同步交流牵引系统,比使用传统的PID控制系统具有更好的动态响应及鲁棒性。

Analysis of negative sequence and efficiency of balance transformer connected in Y and double trapezoids

The LQG(Linear Quadratic Gauss)-based system controller is designed for the PMSM(Permanent Magnet Synchronous Motor) traction system,which applies the LQG/LTR robust control to suppress the influences of parameter disturbance and sensor measurement noise.The LTR(Loop Transfer Recovery) method is used to complete the control performance simulation during parameter disturbance in the optimal design of system controller.Simulative results show that,the system controller has better robustness when parameters vibrate within ± 5 %.The LQG/LTR control system based on DSP platform is designed.Test results show that,with system and measurement noises,the PMSM traction system with LQG/LTR controller has better dynamic performance and robustness than that with PID controller.