Anti-delay high-precision active disturbance rejection attitude control method based on fixed time differentiator prediction

Abstract

The invention discloses an anti-delay high-precision active disturbance rejection attitude control method based on fixed time differentiator prediction, which belongs to the technical field of guidance and control. The specific scheme is as follows: the anti-delay high-precision active disturbance rejection attitude control method based on the fixed time differentiator comprises the following steps of: 1, designing a fixed time convergence differentiator and obtaining an attitude change rate observation value, 2, predicting a real-time flight state based on the fixed time convergence differentiator, 3, constructing an aircraft three-channel attitude error tracking model, and 4, constructing an active disturbance rejection control system, and generating a real-time pneumatic rudder swing instruction through the active disturbance rejection control system by utilizing the real-time flight state of the aircraft. Development and production cost of aircrafts in China can be effectively reduced, and technical support is provided for improving aviation strength in China.

Description

technical field [0001] The invention belongs to the technical field of guidance and control, and relates to a time-delay-resistant and high-precision self-disturbance rejection attitude control method based on fixed-time differentiator prediction. Background technique [0002] The use of high-performance components is an important guarantee for the high-quality flight of the aircraft. However, the high cost brought by high-performance components has also brought a heavy burden to the national finances. While ensuring the flight quality of aircraft, reducing the production cost of aircraft and improving the cost-effectiveness of aircraft mission execution are effective ways to enhance my country's aviation strength. [0003] However, reducing the production cost of the aircraft means using low-cost but poor-performance components, which puts forward higher requirements for the design of the airborne software system. How to use high-quality navigation, guidance, control and o...

AI Technical Summary

Problems solved by technology

[0003] However, reducing the production cost of the aircraft means using low-cost but poor-performance components, which puts forward higher requirements for the design of the airborne software system. How to use high-quality navigation, guidance, control and other algorithms to realize the Effective compensation for hardware system performance loss is the key technology to realize low-cost aircraft

Taking control algorithm design as an example, the use of low-cost devices may cause a large delay in the real-time attitude feedback signal. Under the condition of large delay, the traditional flight control system design method may cause the attitude of the aircraft to oscillate back and forth during flight and fall into hysteresis. Ring state, even posture divergence and instability

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