Aircraft preset time high-precision perturbation observation method

Abstract

A high-precision disturbance observation method for a pre-set time is disclosed. The method comprises: establishing an attitude dynamics model of the aircraft and defining the total disturbance to be observed; setting the expected convergence time of the disturbance observation error and designing a time-domain projection function based on this time; setting the bandwidth parameter of the linear disturbance observation term; and using the time-domain projection function to project the linear disturbance observation term into the pre-set time domain, thereby completing the design of the high-precision disturbance observer for the pre-set time. Traditional disturbance observation methods cannot pre-set the convergence time of the observation error using a single parameter, which adversely affects the design process. The disturbance observation method provided in this invention allows the convergence time of the observation error to be directly determined by a single parameter, thereby simplifying the design process, improving the observation speed, and simultaneously achieving accurate observation of both the disturbance value and the first derivative of the disturbance.

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