Sensors, Vol. 19, Pages 3608: Modeling and Control of a Six Degrees of Freedom Maglev Vibration Isolation System

Sensors, Vol. 19, Pages 3608: Modeling and Control of a Six Degrees of Freedom Maglev Vibration Isolation System Sensors doi: 10.3390/s19163608 Authors: Qianqian Wu Ning Cui Sifang Zhao Hongbo Zhang Bilong Liu The environment in space provides favorable conditions for space missions. However, low frequency vibration poses a great challenge to high sensitivity equipment, resulting in performance degradation of sensitive systems. Due to the ever-increasing requirements to protect sensitive payloads, there is a pressing need for micro-vibration suppression. This paper deals with the modeling and control of a maglev vibration isolation system. A high-precision nonlinear dynamic model with six degrees of freedom was derived, which contains the mathematical model of Lorentz actuators and umbilical cables. Regarding the system performance, a double closed-loop control strategy was proposed, and a sliding mode control algorithm was adopted to improve the vibration isolation performance. A simulation program of the system was developed in a MATLAB environment. A vibration isolation performance in the frequency range of 0.01–100 Hz and a tracking performance below 0.01 Hz were obtained. In order to verify the nonlinear dynamic model and the isolation performance, a principle prototype of the maglev isolation system equipped with accelerometers and position sensors was developed for the experiments. By comparing the simulation results and the experiment res...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research