Fuzzy control of landing gear based on MR damper
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摘要: 根据流变力学的特点,并结合飞机起落架的实际工作情况,简化了起落架缓冲器的受力情况,建立了应用在起落架上的磁流变缓冲器模型.该缓冲器采用环形缝隙结构,无需改变截流面积便能达到改变阻尼的目的,具有结构简单、尺寸较小、易于控制等优点.建立并分析了起落架的系统动力学模型,在控制方法上采用了模糊控制,通过控制电流以控制由磁场产生的力.仿真结果显示在飞机着陆撞击时,本文采用的模糊控制实现了能量吸收和消散快的目的,同时也体现了磁流变缓冲器应用在起落架上的优势.Abstract: Basing on rheological dynamics and the real condition of landing gear, the forces that pressed on the landing gear had been simplified and MR (Magneto-rheological or Magnetically Responsive) damper model was applied on landing gear. Annular gap structure was applied on the damper, so the damp force could be easily controlled without changing the area of the gap. As a result, MR damper had many advantages, such as simple structure, small size and easy control. The landing gear system model with fuzzy controller was built and analyzed. Fuzzy controlling method had been chosen and used on the system, and the force influenced by magnetic field strength could be controlled by controlling current. Simulation results show that the energy during landing could be absorbed and consumed quickly by fuzzy control, at the same time, the predominance of applying of the MR damper on landing gear has been showed.
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Key words:
- landing gear /
- MR damper /
- fuzzy control
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