Self-adaptive high-order sliding mode control method of high-altitude platform air inlet environment simulation system

Abstract

The invention discloses a self-adaptive high-order sliding mode control method of a high-altitude platform air inlet environment simulation system, and relates to the field of high-altitude platform air inlet environment simulation system control. The method comprises the following steps: establishing a dynamic second-order model of a high-altitude platform air inlet environment simulation system; constructing an error tracking model of the controller; designing a self-adaptive gain and a self-adaptive law of the controller by using an integral terminal sliding mode function; and based on the error tracking model of the controller and the adaptive gain and the adaptive law of the controller, designing an adaptive high-order sliding mode controller so as to carry out adaptive high-order sliding mode control on the high-altitude table air inlet environment simulation system. According to the invention, the adaptive high-order sliding mode controller is designed, and the response speed and the anti-interference capability of the high-altitude platform air inlet environment simulation system are improved by using the adaptive gain and the adaptive law designed by the integral terminal sliding mode function; and therefore, the air inlet pressure value can still be kept and the set pressure value can be accurately tracked under the condition that the air flow of the engine violently fluctuates due to the quick action of the throttle lever of the engine.

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