%0 Journal Article
%T System integration and control design of a maglev platform for space vibration isolation
%A Haibo Gao
%A Honghao Yue
%A Liang Ding
%A Rongqiang Liu
%A Yifan Lu
%A Zhaopei Gong
%A Zongquan Deng
%J Journal of Vibration and Control
%@ 1741-2986
%D 2019
%R 10.1177/1077546319836892
%X Micro-vibration has been a dominant factor impairing the performance of scientific experiments which are expected to be deployed in a micro-gravity environment such as a space laboratory. The micro-vibration has serious impact on the scientific experiments requiring a quasi-static environment. Therefore, we proposed a maglev vibration isolation platform operating in six degrees of freedom (DOF) to fulfill the environmental requirements. In view of the noncontact and large stroke requirement for micro-vibration isolation, an optimization method was utilized to design the actuator. Mathematical models of the actuator's remarkable nonlinearity were established, so that its output can be compensated according to a floater's varying position and a system's performance may be satisfied. Furthermore, aiming to adapt to an energy-limited environment such as space laboratory, an optimum allocation scheme was put forward, considering that the actuator's nonlinearity, accuracy, and minimum energy-consumption can be obtained simultaneously. In view of operating in 6-DOF, methods for nonlinear compensation and system decoupling were discussed, and the necessary controller was also presented. Simulation and experiments validate the system's performance. With a movement range of 10£¿¡Á£¿10£¿¡Á£¿8£¿mm and rotations of 200 mrad, the decay ratio of £¿40 dB/Dec between 1 and 10£¿Hz was obtained under close-loop control
%K Active vibration control
%K vibration isolation
%K maglev actuator
%K optimum allocation
%K nonlinear compensation
%U https://journals.sagepub.com/doi/full/10.1177/1077546319836892