Nonlinear anti-interference control method and device for electronic throttle system

Abstract

The invention discloses a nonlinear anti-interference control method and device for an electronic throttle system. On the basis of a system control model and the continuous finite-time anti-interference control method, the control device and a design method for a tracking control problem of electronic throttle valve opening are designed. The invention designs an observation method and device for multi-source interference, uncertainty and nonlinearity caused by factors such as an intake air flow, friction, spring torque and backlash, and so accurate estimation of lumped interference and systemstate variables is realized in finite time. According to the invention, a continuous terminal sliding mode control method and an output feedback control method are combined to effectively suppress adverse effects of the multi-source, uncertainty and nonlinearity in the electronic throttle system. Therefore, the accurate tracking control of the electronic throttle valve opening is realized in the finite time when the system is disturbed, the hardware cost of the system is reduced, and the dynamic characteristics, steady state characteristics and anti-interference ability of the system are improved.

Description

technical field [0001] The invention relates to an electronic throttle system control technology, which belongs to the technical field of vehicle engine internal combustion system control. Background technique [0002] In recent years, with the increasing energy shortage problem, the energy problem in the vehicle engine control system has been paid more and more attention. Different from the traditional throttle, the electronic throttle has become a recent research hotspot and has been widely used because of its advantages of high efficiency, environmental protection and energy saving. [0003] In the traditional throttle system, the throttle body is directly connected to the accelerator pedal through a coil, and its opening is only related to the displacement of the pedal. The purely mechanical structure makes its control method relatively simple, which belongs to direct control. In the electronic throttle system, the control method is indirect control, and the electronic ...

AI Technical Summary

Problems solved by technology

Among them, the sliding mode control method has attracted much attention because of its dual advantages in tracking accuracy and robustness, but because its control law contains a sign function, the discontinuity of the control variable will cause chatter and even reduce the tracking of the system. Accuracy and Robustness

In addition, the existing methods mostly use state feedback control, that is, they need to obtain all the information of the system state quantity, and can only make the system asymptotically converge rather than converge within a limited time, so the cost of the system is increased to a certain extent, And it cannot meet the fast tracking and high fault tolerance requirements of the system

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