The permanent magnet electromagnetic hybridmagnet (PEHM) has the advantages of low energy consumptionand a large suspension air gap. In this study, an unbalancedPEHM structure is proposed, which combines the advantage...The permanent magnet electromagnetic hybridmagnet (PEHM) has the advantages of low energy consumptionand a large suspension air gap. In this study, an unbalancedPEHM structure is proposed, which combines the advantages ofthe previous hybrid magnet structure. First, by establishing themagnetic circuit model of the new hybrid magnet structure, theinfluence of magnetic field distribution on the working magneticcircuit of the magnet is analyzed, and the method of magneticforce correction calculation of the new structure magnet isgiven. Then, the validity of the magnetic calculation method isverified by the 3D finite element method (FEM). Furthermore, theaverage suspension power force ratio is used as the optimizationgoal, and the system parameters of the hybrid magnet under aworking air gap of 6–10 mm and a load condition of 15000–20000 N are optimized by a genetic algorithm. Compared withthe previous hybrid magnet, the optimized hybrid magnet systemcan maintain lower power consumption under comprehensiveworking conditions.展开更多
为有效降低系统固有频率,获得外部振动在多频段的强衰减,以永磁电磁混合作动器为负刚度结构提出并设计了一种准零刚度的磁悬浮隔振平台,实现了基于模糊PID(proportional integral differential)算法的振动主动控制系统.首先,通过特性分...为有效降低系统固有频率,获得外部振动在多频段的强衰减,以永磁电磁混合作动器为负刚度结构提出并设计了一种准零刚度的磁悬浮隔振平台,实现了基于模糊PID(proportional integral differential)算法的振动主动控制系统.首先,通过特性分析与参数计算,基于准零刚度理论完成了准零刚度磁悬浮隔振平台的方案设计;其次,建立磁悬浮隔振系统模型,提出基于模糊PID算法的振动主动控制策略,可主动调节系统的等效刚度和阻尼;最后,基于Speedgoat实时目标机开发振动主动控制系统,搭建隔振测试平台,并开展了隔振性能测试.研究结果表明:本文设计的准零刚度磁悬浮隔振平台通过采用模糊PID的控制策略能够主动调节PID参数,动态调整系统的等效刚度和阻尼;外部振动频率在20~100 Hz频率段内,振动衰减率大于80%;外部振动频率在100~500 Hz频率段内,振动衰减率大于90%.展开更多
基金the Fundamental Research Funds for the Central Universities of China(No.2682017CX050).
文摘The permanent magnet electromagnetic hybridmagnet (PEHM) has the advantages of low energy consumptionand a large suspension air gap. In this study, an unbalancedPEHM structure is proposed, which combines the advantages ofthe previous hybrid magnet structure. First, by establishing themagnetic circuit model of the new hybrid magnet structure, theinfluence of magnetic field distribution on the working magneticcircuit of the magnet is analyzed, and the method of magneticforce correction calculation of the new structure magnet isgiven. Then, the validity of the magnetic calculation method isverified by the 3D finite element method (FEM). Furthermore, theaverage suspension power force ratio is used as the optimizationgoal, and the system parameters of the hybrid magnet under aworking air gap of 6–10 mm and a load condition of 15000–20000 N are optimized by a genetic algorithm. Compared withthe previous hybrid magnet, the optimized hybrid magnet systemcan maintain lower power consumption under comprehensiveworking conditions.
文摘为有效降低系统固有频率,获得外部振动在多频段的强衰减,以永磁电磁混合作动器为负刚度结构提出并设计了一种准零刚度的磁悬浮隔振平台,实现了基于模糊PID(proportional integral differential)算法的振动主动控制系统.首先,通过特性分析与参数计算,基于准零刚度理论完成了准零刚度磁悬浮隔振平台的方案设计;其次,建立磁悬浮隔振系统模型,提出基于模糊PID算法的振动主动控制策略,可主动调节系统的等效刚度和阻尼;最后,基于Speedgoat实时目标机开发振动主动控制系统,搭建隔振测试平台,并开展了隔振性能测试.研究结果表明:本文设计的准零刚度磁悬浮隔振平台通过采用模糊PID的控制策略能够主动调节PID参数,动态调整系统的等效刚度和阻尼;外部振动频率在20~100 Hz频率段内,振动衰减率大于80%;外部振动频率在100~500 Hz频率段内,振动衰减率大于90%.