Anti-skid brake control system of airplane

A control method and anti-skid braking technology, applied in aircraft braking arrangements, brake regulators, etc., can solve the problems of deep slippage of the system and unhelpful braking, and achieve the effect of taking into account the efficiency of anti-skid braking and the safety of anti-lock braking

Inactive Publication Date: 2014-03-05
渭南高新区晨星专利技术咨询有限公司
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Problems solved by technology

[0007] In response to these problems, the present invention will adopt the following methods to improve this problem: the first method is to carry out online identification of the longitudinal dynamics process of the aircraft through neural networks, construct the longitudinal sliding dynamics process, and then control the aircraft through the adaptive neural network. To ensure that the braking system can track the set slip rate in the presence of vertical and longitudinal uncertainties. Considering the physical constraints of the braking torque input, excessive braking torque will not help the braking, but will easily cause the system to fall into deep skid , the invention performs constraint processing on the control input, so that the controller can learn the uncertain part and track the set slip curve under the input constraint situation

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  • Anti-skid brake control system of airplane
  • Anti-skid brake control system of airplane
  • Anti-skid brake control system of airplane

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Embodiment Construction

[0205] In order to verify the validity and robustness of the previous design algorithm, the present invention considers two working conditions: one is that the interference caused by the vibration of the landing gear to the friction identification of the braking system is not considered; the other is that the landing gear is a spring Damping systems, or periodic vertical loads to the wheels. The torque input is constrained in the neighborhood in here choose for simulation. The present invention discusses two cases, the reference model parameters are set at ω n =10rad / s and ζ n =1. The optimal slip ratios of the aircraft on the dry runway and wet runway are 0.16 and 0.14 respectively;

[0206] First discuss the case of no periodic vertical load on the landing gear, from image 3 It can be observed that through the online identification at the initial stage, the operating point of the system can be maintained near the optimal slip rate λ=0.14. Near the new optimal sli...

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Abstract

The invention relates to an anti-skid brake control system of an airplane. According to the anti-skid brake control system of the airplane, a robust interference-resisting property of a differentiator or a second order sliding mode differentiator is tracked to construct an airplane speed deceleration rate signal for calculating a slippage force, and a longitudinal dynamics process is prevented from being learned and identified; the method does not need to assume that a brake longitudinal force is distributed uniformly, and can be used for a multi-wheel brake system; furthermore, a safe working range of the brake system is considered and a brake pressure is restrained; the anti-skid brake efficiency and the anti-locking safety are considered and the anti-skid brake control system of the airplane has the certain advancement.

Description

technical field [0001] The invention relates to an aircraft anti-skid brake control method, which belongs to the technical field of brake automatic control. Background technique [0002] The landing gear-braking system is a subsystem with relatively independent functions on the aircraft. Its function is to bear the static weight of the aircraft, dynamic impact load and absorb the kinetic energy of the aircraft when it lands, so as to realize the landing, taxiing and turning control of the aircraft. Modern aircraft are generally equipped with anti-skid brake system (Anti-skid Brake System, ABS), which uses a closed-loop control method to automatically adjust the braking torque on the basis of the traditional braking system to prevent the aircraft wheel from being damaged due to excessive braking pressure during braking. lockout. It can make full use of the maximum combination coefficient between the aircraft tires and the ground to obtain higher braking efficiency, thereby e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C25/46
Inventor 不公告发明人
Owner 渭南高新区晨星专利技术咨询有限公司
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