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| Research on the Adaptive Suppression of Gyroscopic Effect of Rigid Asymmetric Magnetically Suspended High-Speed Rotor with Large Inertia |
| SHEN Yifei1,2 HAN Bangcheng1,2 ZHENG Shiqiang1,2 |
1. Science and Technology on Inertial Laboratory (Beihang University), Haidian District, Beijing 100191, China;
2. Fundamental Science on Novel Inertial Instrument & Navigation System Technology Laboratory (Beihang University), Haidian District, Beijing 100191, China |
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Abstract A dynamic model for rigid asymmetric rotor is established due to the problem that the instability of vortex motion of unilateral rotor appears when the rigid asymmetric magnetically suspended rotor with large inertia run at high speed. Meanwhile, a speed-adaptive multi-channel unilateral filtering PIDC control method is presented, which can compensate the phase of the instability of vortex motion of the end away from the centroid of the rotor through optimizing the preset parameters by switching cross feedback channel in different rotational speed interval automatically. The simulation results shows that this easily-used method of PIDC control can effectively resolve the instability of precession and nutation modes at one end of the rotor which is caused by gyroscopic effect of the rotor at high speed. Experiment verifies the reliability of this method: the prototype of molecular pump increasing the speed to 21000r/min smoothly achieves the design specification of vacuum performance.
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Received: 15 June 2015
Published: 15 November 2016
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