The maglev vibration isolation system has the characteristics of nonlinearity, coupling, high response and wide band. The vibration isolation control target and the position constraint between the stator and the floater is restricted by each other, which brings a great challenge on precision control. To solve the problem, a six degrees-of-freedom nonlinear dynamic model of the maglev vibration isolation system for control is established and a double-closed-loop control strategy is put forward. Through that, the system can achieve vibration isolation control in low and medium frequency band and achieve motion tracking control in the very-low frequency band. PD fixed-point control algorithm is adopted and a control system simulation program is developed in MATLAB/Simulink environment. By analyzing the absolute motion response of the floater and the relative motion response between the stator and the floater for different disturbance frequencies, the simulation results of isolation control and the tracking control are obtained. A test system of the maglev vibration isolation platform prototype is setup, and the correctness of the dynamic model and the validity of the proposed control strategy are verified.
WU Qianqian
,
CUI Ning
,
LIU Bilong
,
YUE Honghao
,
LIU Rongqiang
. Dynamic model and control strategy of multi-dimentional maglev vibration isolation system[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019
, 40(6)
: 222522
-222522
.
DOI: 10.7527/S1000-6893.2019.22522
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