具有扰动观测器调速系统的稳定性分析及转速环设计

针对将扰动观测器应用于实际伺服系统有可能由于参数选取不当导致系统不稳定的问题,提出应用于实际伺服系统的扰动观测器的一般性结构;讨论了扰动观测器环节对系统稳定性的影响,给出了扰动观测器环节参数的选取方法;分析了具有扰动观测器的实际调速系统转速环的设计方法。仿真实验表明采用该法设计嵌有扰动观测器的调速系统,能够使系统稳定的同时,具有良好的动、静态性能。

Stability analysis and speed loop design of speed control system with disturbance observer

Servo systems with a disturbance observer may become unstable since the parameters are not carefully matched. This paper describes a general disturbance observer structure model for practical servo systems used to analyze the influence of the disturbance observer on the system stability and to chose suitable parameters. The speed loop design of a system with a disturbance observer is also discussed. Simulation results show that this method can be used to design a the speed control system with an embedded disturbance observer that is stable with good dynamic as well as steady performance.