Aircraft anti-skid brake system control method with online interference estimation
A technology of anti-skid brakes and aircraft, applied in the direction of aircraft brake arrangements, brake regulators, etc., can solve problems such as parameter uncertainty
Active Publication Date: 2021-04-20
CENT SOUTH UNIV
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[0005] The present invention provides an aircraft anti-skid braking system control method with interference online estimation to solve the problem of optimal slip rate tracking of the aircraft anti-skid braking system model in the prior art subject to parameter uncertainty and uncertain external interference
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[0059] The invention provides an aircraft anti-skid braking system control method with online estimation of uncertainty interference, aiming at tracking the optimal slip rate of the aircraft anti-skid braking system with uncertain model parameters and uncertain external interference, the original anti-skid braking system Based on the linearization of input and output feedback, the integral sliding mode control method is adopted, and combined with the online estimation of adaptive RBF (radial basis function) neural network to solve the problem of model parameter uncertainty and uncertain external interference to the control effect. adverse effects. On the one hand, the adaptive RBF neural network technology is used to estimate the uncertain model parameters online and as a compensation part of the control law, so as to minimize the error of the parameter value under real braking conditions; on the other hand, the integral sliding mode control technology is used to weaken the Ex...
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The invention discloses an aircraft anti-skid brake system control method with online interference estimation. The method comprises the following steps of 1, establishing an anti-skid brake system model, and performing feedback linearization processing; 2, introducing uncertain interference existing in the anti-skid brake system into the anti-skid brake system model subjected to feedback linear processing, and then designing an integral sliding mode surface and a controller for the anti-skid brake system; wherein the uncertainty interference comprises external disturbance caused by time varying and internal disturbance caused by parameter variation of an unmodeled part; and 3, carrying out online estimation on the uncertainty interference by adopting an adaptive RBF neural network, and introducing the uncertainty interference into a controller of the antiskid brake system as a compensation part. According to the method, the aircraft anti-skid braking efficiency can be improved from three aspects of a strong-robustness anti-skid braking control law, an accurate anti-skid braking system model and uncertainty interference online estimation and compensation.
Description
technical field [0001] The invention belongs to the field of aircraft brake control, and in particular relates to an aircraft anti-skid brake system control method with interference online estimation. Background technique [0002] During the whole process of aircraft flight, it takes a very short time to take off and land on the ground runway, but large-scale accidents frequently occur in these two stages. It can be seen that a safe and reliable aircraft brake control system is extremely important for aircraft navigation. . [0003] In fact, the aircraft anti-skid braking system has serious uncertainty interference, which has a great impact on the control system. Common disturbances include: internal disturbances caused by parameter changes, unmodeled parameters, and external disturbances caused by time-varying, etc. [0004] At present, the mainstream traditional multi-threshold speed difference plus bias (PID+PBM) control at home and abroad has no obvious braking effect,...
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IPC IPC(8): B64C25/46
Inventor 李繁飙黄培铭黄科科阳春华廖力清周灿吴政
Owner CENT SOUTH UNIV