免疫单神经元PID控制在永磁交流伺服系统中的应用

针对传统PID调节不易在线实时调整参数,难以有效控制复杂和时变系统的不足,以及单神经元PID控制不能实时调整增益、响应慢的缺点,介绍了一种通过免疫反馈机理实现增益自调整的单神经元自适应PID,并将其应用于永磁交流伺服系统.系统转速环控制器采用基于单神经元的自适应PID控制算法,实现PID参数的在线实时调整.在单神经元中引入免疫反馈机理,实现增益自调整,提高其响应速度.仿真和实验结果表明,该算法可以在一定程度上增强系统的抗扰动能力,改善系统的速度控制效果,使转速的超调更小、振荡减弱、响应速度加快、稳态误差减小,提高了系统的动态和稳态性能.

Application of Immune Single Neuron PID Regulator in Permanent Magnet Synchronous Machine AC Servo System

It is difficult for the traditional PID regulator to adjust parameters online in controlling complicated timevarying systems, and the gain is unable to be adjusted automatically and the response rate is lower for the single neuron PID regulator. A new single neuron adaptive PID regulator based on immune feedback mechanism is proposed and applied to PMSM AC servo system. The single neuron adaptive PID algorithm is employed as the speed closed-loop controller of servo system to fulfill real-time adjustment of the PID parameters, and the immune feedback mechanism is embedded to achieve self-adjustment of the gain coefficient and enhance the response rate. The simulations and experiments show that the control strategy effectively increases anti-disturbance capabilities and improves speed control effects of the system, thus the overshoot and oscillation get less, the response rate heightens,and the steady state error becomes smaller speed control, loading to better dynamical and steady state performances of speed control.