基于PID控制的主动磁轴承-飞轮转子系统运动稳定性研究

磁悬浮支承应用于控制力矩陀螺具有很多优点,但是飞轮转子在高转速下表现出的陀螺效应是影响系统稳定性的主要因素。现研究了由于陀螺效应产生的章动和进动造成系统失稳的根本原因,并对控制系统提出改进方案。为研究方便,提出了相位分析的方法进行PID控制系统分析。研究结果表明,章动失稳的主要原因是系统的相位滞后引起,进动失稳主要因为积分控制项对系统负阻尼作用引起,同时,研究表明积分控制对系统章动稳定性影响很小。

Study on Dynamic Stability of Flywheel Rotor Supported by AMB Based on PID Controller

Active Magnetic Bearing (AMB) has many advantages when it is used in Control Moment Gyroscopic. Meanwhile system's stability is the critical problem. Stability of Flywheel rotor supported by AMB is studied in this paper. Nutation and process caused by gyroscopic effects impact on system's stability when the rotor runs at high rotation speed. How gyroscopic effects influence the stability is analyzed in this paper. It is found that phase lag of the system is the major problem which causes the nutation instability. And the stability of process is mainly affected by integral item of PID control. It is also found that the integral item has little influence on nutation stability. The fundamental explanation of these phenomena is presented in this paper. Phase analysis method is introduced into stability analysis of PID control system.