A nonlinear anti-interference control method and device for an electronic throttle system

Abstract

The invention discloses a nonlinear anti-interference control method and device for an electronic throttle system. Based on a system control model and a continuous finite time anti-interference control method, a control method is designed for the tracking control problem of the electronic throttle valve opening. Devices and design methods. For multi-source interference, uncertainty and nonlinearity caused by intake air flow, friction, spring torque, backlash and other factors, the present invention designs an observation method and device, which realizes lumped interference and Accurate estimation of system state variables. The invention combines the continuous terminal sliding mode control method and the output feedback control method, effectively suppressing the adverse effects of multi-source interference, uncertainty and nonlinearity in the electronic throttle system, so that when the system is disturbed, Accurate tracking control of the opening of the electronic throttle valve is realized in a limited time, while 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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