A Design of Nose Wheel Steering Control Law Based on Fuzzy Control

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (4) : 128-135.

ZHAO Zhe 1 JIA Yuhong 2 TIAN Jianbo3

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Abstract

It is required that, during low-velocity taxi phase, neither nose gear nor main gears shall side slide when aircraft swerving[1]. In practical application, nose wheel turns at a constant rate, which equal to the lower limit of nose wheel allowable steering rate, to meet above requirements [1]. However, in this control method, aircraft’s ground maneuver control performance reduces, significantly. Meanwhile, due to the degree of freedom of a multiple-bogie undercarriage system is high, it is too complicated to find the general solution of nose wheel allowable steering rate. To solve above problems, set up a kinetic analysis model of a multiple-bogie undercarriage system and design a control law based on the fuzzy control theory. The calculations and simulations demonstrate that allowable nose wheel steering rate could be affected by aircraft’s velocity, nose wheel steering angle and engine thrust; allowable nose wheel steering rate could be improved by reducing aircraft’s velocity and engine thrust on condition that aircraft’s configuration is identical and aircraft’s safety and performance not reduce; Fuzzy control theory could be implemented on nose wheel steering rate control design; Nose wheel steering rate control law based on the fuzzy control theory could fully develops aircraft’s ground maneuver control capability and improves aircraft’s ground maneuver control performance.

Key words

Landing Gear / Multiple-bogie Undercarriage / Nose Wheel Steering / Fuzzy Control / Control Law

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ZHAO Zhe 1 JIA Yuhong 2 TIAN Jianbo3. A Design of Nose Wheel Steering Control Law Based on Fuzzy Control[J]. Journal of Vibration and Shock, 2018, 37(4): 128-135

References

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