基于转速的磁轴承柔性转子系统模糊控制策略研究

建立了五自由度磁悬浮轴承柔性转子试验系统，利用Matlab工具箱对比分析了不完全微分PID和模糊自调整PID控制策略对系统动态性能的影响，设计制作了基于TMS320F28335 DSP的数字控制器硬件电路，在模糊自调整PID控制策略的基础上引入转速量，在不同转速区段采用不同的模糊自调整因子，以满足转子在各转速区段对支承特性的不同要求，编写了相应的软件，完成了系统的高速旋转试验。仿真和试验结果均表明，采用基于转速的模糊自调整控制策略，可以改善磁悬浮轴承柔性转子系统的动态性能。

Research on Fuzzy Control Strategy for Flexible Rotor System Supported by Magnetic Bearing Based on Rotation Speed

A test system of flexible rotor supported by five degree-of-freedom active magnetic bearings is established. The influences of fuzzy self-adjusting PID and incomplete differential PID control strategies on dynamic characteristics of the system are analyzed separately by the Matlab toolbox. The hardware circuit and corresponding control programs of the digital controller based on TMS320F28335 DSP are developed. The value of the rotation speed is introduced into the digital controller. Different fuzzy self-tuning factors are adopted to meet the support features required by rotor in different rotation speed sectors. The tests of actual operation of the system are finished. The emulations and experiments show that, compared with the incomplete differential PID control strategy, fuzzy self-adjusting PID control strategy based on the rotation speed can significantly improve the dynamic performance of the system.