Abstract
The linear active disturbance rejection control of a permanent magnetic suspension system with a controllable magnetic circuit is studied. The permanent magnet suspension system is a high-order, strongly nonlinear, open-loop unstable system, which is easy to be disturbed by the internal or external complex environment of the system. This paper makes use of the advantages of ADRC, such as strong anti-jamming ability and excellent tracking performance. The cascade control is used to reduce the order of the system, and the linear active disturbance rejection controller is used to control the permanent magnet suspension system. Under the simulation conditions of 0.2mm step and 0.6N step, the linear ADRC and PID controllers are compared and analyzed. The simulation results show that the linear ADRC controller has strong tracking ability and anti-interference ability.