Adaptive control and nonlinear compensation for passive-active hybrid vibration isolation mount using maglev actuator
In order to effectively control the low frequency vibration of ship machinery，a passive-active hybrid vibration isolation mount using maglev actuator was designed. Maglev actuator is excellent for active vibration isolation, with non-contact structure, low stiffness and rapid response. However, the actuator’s nonlinearity has to be restrained by control algorithm. The nonlinearity of maglev actuator was analyzed, the nonlinear reverse model of actuator was built through theoretical analysis and experimental correction, and an improved FxLMS algorithm based on reverse model linearization and frequency range division control was put forward, which has the advantage of low computation load for real time control. Experiments were performed on a multiple-DOF active vibration isolation system, results show that the improved FxLMS algorithm could effectively reduce the vibration energy at targeted frequency, and well restrain the nonlinearity-induced vibration.
In order to effectively control the low frequency vibration of ship machinery，a passive-active hybrid vibration isolation mount using maglev actuator was designed. Maglev actuator is excellent for active vibration isolation, with non-contact structure, low stiffness and rapid response. However, the actuator’s nonlinearity has to be restrained by control algorithm. The nonlinearity of maglev actuator was analyzed, the nonlinear reverse model of actuator was built through theoretical analysis and experimental correction, and an improved FxLMS algorithm based on reverse model linearization and frequency range division control was put forward, which has the advantage of low computation load for real time control. Experiments were performed on a multiple-DOF active vibration isolation system, results show that the improved FxLMS algorithm could effectively reduce the vibration energy at targeted frequency, and well restrain the nonlinearity-induced vibration.
Abstract：In order to effectively control the low frequency vibration of ship machinery，a passive-active hybrid vibration isolation mount using maglev actuator was designed. Maglev actuator is excellent for active vibration isolation, with non-contact structure, low stiffness and rapid response. However, the actuator’s nonlinearity has to be restrained by control algorithm. The nonlinearity of maglev actuator was analyzed, the nonlinear reverse model of actuator was built through theoretical analysis and experimental correction, and an improved FxLMS algorithm based on reverse model linearization and frequency range division control was put forward, which has the advantage of low computation load for real time control. Experiments were performed on a multiple-DOF active vibration isolation system, results show that the improved FxLMS algorithm could effectively reduce the vibration energy at targeted frequency, and well restrain the nonlinearity-induced vibration.
李 彦，何 琳，帅长庚，吕志强. 磁悬浮主被动隔振系统自适应控制及非线性补偿[J]. 振动与冲击, 2015, 34(6): 89-94.
LI Yan，HE Lin，SHUAI Chang-geng，Lü Zhi-qiang. Adaptive control and nonlinear compensation for passive-active hybrid vibration isolation mount using maglev actuator. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(6): 89-94.
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