Research on Control Strategy of Magnetic Levitation Gravity Compensator Based on Lyapunov Stability Criterion

2018 3rd International Conference on Insulating Materials, Material Application and Electrical Engineering

材料科学;无线电电子学;电工学

Shi, Xiangyu^1 ; Mao, Qingqing^1

State Grid Hubei Electric Power Company Limited Yichang Power Supply Company, Yichang, China^1

关键词: Displacement characteristic;    Dynamic control systems;    Lyapunov stability criterion;    Lyapunov stability theory;    Optimal design parameters;    Re-writable characteristics;    Simulation optimization;    Symmetrical structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/452/4/042146/pdf
DOI  :  10.1088/1757-899X/452/4/042146

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A magnetic levitation gravity compensator is designed based on the remanent rewritable characteristics of variable flux permanent magnets. It adopts a coaxial symmetrical structure, which maximizes the use of stray flux and reduces the use of the magnet core, thereby increasing the repulsive density of the device. Through simulation optimization of the design scheme, we extracted the optimal design parameters, so that the repulsion and stiffness displacement characteristics of the working stroke meet the requirements of system self-recovery. At the same time, we have analysed the repulsion and stiffness displacement characteristics of the magnetic levitation gravity compensator. According to Lyapunov stability theory, we designed the dynamic control system of the device and established the workflow of the system. We verified the effectiveness of the design of the device and the reliability of the control system through experiments on the engineering prototype.