Abstract
Aircraft hydraulic brake system usually use pressure servo valve for anti-skid brake control. As pressure servo valve realizes the pressure closed loop by hydraulic feedback loop, this structure increased the complexity of the processing and manufacturing, restricted the pressure closed loop parameters adjustment, and increased the difficulty of debugging the system design. Pressure servo valve is expensive and difficult to process, poor ability to resist pollution. This paper proposed a slip ratio large closed loop aircraft anti-skid brake control method based on high-speed on-off valve, built the model of aircraft ground vertical taxiing and slip ratio large closed loop control algorithm in the MATLAB/SIMULINK, and built the model of aircraft hydraulic brake system based on on-off valve in the AMESim and a joint simulation was carried out. The simulation results show that the aircraft anti-skid brake control method based on high-speed on-off valve is feasible, and the on-off valve is cheap with strong ability to resist pollution, easy processing and manufacturing and so on, showing a good application prospect.
Highlights
Aircraft brake system is an important component of modern aircraft, mainly used in the dissipation of the ground aircraft taxiing kinetic energy, ensuring the aircraft brake to stop, shortening the distance of the aircraft taxiing, preventing excessive wear of wheels, and cooperating with the other airborne systems to achieve the aircraft turning and stop function
In order to prevent the occurrence of such phenomena, anti-skid brake control has become the necessary function in the aircraft brake system
The pressure servo valve is usually used as the component of brake pressure control in the aircraft hydraulic brake system
Summary
Aircraft brake system is an important component of modern aircraft, mainly used in the dissipation of the ground aircraft taxiing kinetic energy, ensuring the aircraft brake to stop, shortening the distance of the aircraft taxiing, preventing excessive wear of wheels, and cooperating with the other airborne systems to achieve the aircraft turning and stop function. It increased the feedback convex shoulder on the valve core of slide valve, and increased the matching surface, process complex; Second, pressure closed loop is determined by the design and manufacture, and it is hard to readjust the closed loop circuit parameters after the completion of manufacture , and it increased the difficulty of the design and debugging; Third, the traditional pressure servo valve is expensive, hard to process and manufacture with poor ability to resist pollution, and other disadvantages [8,9] To solve these problems, this paper proposed a slip ratio large close loop aircraft anti-skid brake control method based on high-speed on-off valve. G0 is the initial air gap length, gv is the working air gap length, xv is the valve core displacement, and c is the average radius of the nonmagnetic materials lining, which is:
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
