Electromechanical drive architecture and braking force control method for redundant electric brakes

Abstract

Provided are a redundant electric braking electromechanical-driven framework and a braking force control method. A typical electric braking and monitoring system is established with an airplane with four main braking wheels as a target machine, a plurality of electromechanical actuators on each main braking wheel are controlled by different electromechanical drivers, when certain channels are broken down, the braking capacity of the airplane is maintained to the greatest extent by increasing the braking compression force output by the normal electromechanical drivers, the task reliability of the airplane in the landing braking process is enhanced, meanwhile, severe unbalance of the braking torques of the two sides of the airplane is avoided, the airplane is prevented from drifting of a runway, deformation of an undercarriage under asymmetrical braking loads is reduced, and the working environment of a braking system is improved; and meanwhile, the braking distance is shortened, the safety of the airplane in case of failure of the electric braking system is further improved, the possibility that the airplane suffers braking failure under various complex combined failure states can be reduced, and the braking capacity of the airplane is improved to the greatest extent.

Description

technical field [0001] The invention belongs to the field of electromechanical actuator control in aircraft brake system engineering, and in particular relates to the improvement of the electromechanical drive structure of aircraft electric brakes. Background technique [0002] The aircraft electric braking system uses electric energy as a power source to control the braking force acting on the aircraft wheels according to the braking command imposed by the pilot. [0003] Boeing's B787 aircraft is currently the most advanced electric brake system, using electromechanical actuation and drive control technology. figure 1 It is the structural principle diagram of the brake control and monitoring system of B787 aircraft, mainly including one captain left brake command sensor 1 and one captain right brake command sensor 2, two front wheel remote data concentrators 3 and two front wheel 4, One chief pilot left brake command sensor 5 and one chief pilot right brake command sensor...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem existing in the prior art that when the electromechanical drive fails, the electromechanical actuators on some wheel brake devices will completely lose the braking ability, resulting in a reduction in the braking ability of the aircraft, or the brake will deviate, so that it will rush out of the runway , deviation from the runway, and deterioration of the stress on the landing gear, the present invention proposes a redundant electric brake electromechanical drive structure and a braking force control method.

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