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Acta Aeronautica et Astronautica Sinica ›› 2024, Vol. 45 ›› Issue (12): 229425-229425.doi: 10.7527/S1000-6893.2024.29425

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles    

Experimental research on drop loading alleviation using on⁃off control for magneto⁃rheological landing gear

Zaifei KANG1,2, Le WANG1, Pengwei JIANG1, Zhichun YANG1()   

  1. 1.School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China
    2.AVIC Chengdu Aircraft Design & Research Institute,Chengdu 610091,China
  • Received:2023-08-09 Revised:2023-10-31 Accepted:2024-01-09 Online:2024-01-19 Published:2024-01-17
  • Contact: Zhichun YANG E-mail:yangzc@nwpu.edu.cn
  • Supported by:
    National Level Project

Abstract:

The magneto-rheological buffer of the landing gear is a semi-active damper designed based on the magneto-rheological effect. It can adjust the damping level of the buffer by varying the current of the exciting coil, thereby alleviating the landing load of the landing gear. We design a magneto-rheological buffer with on-off control and test the circuit dynamic response of the magneto-rheological buffer. To solve the time delay problem of the circuit response, an on-off controller with local negative feedback is proposed and designed to adjust the excitation coil current of the magneto-rheological buffer to alleviate the drop load. The effectiveness of alleviating the landing load is validated through the drop test. The results show that using the on-off control strategy with local negative feedback, we can reduce the peak value of the drop load by 10.3%, compared with the case in which the exciting coil is not energized (i.e., the oleo-pneumatics buffer).

Key words: magneto-rheological buffer, landing gear, drop loading alleviation, on-off control, feedforward control

CLC Number: