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

Abstract

The invention discloses an anti-time-delay high-precision self-disturbance rejection attitude control method based on fixed-time differentiator prediction, which belongs to the technical field of guidance and control. The attitude control method includes the following steps: Step 1: Design a fixed-time convergent differentiator and obtain the observed value of the attitude change rate; Step 2: Predict the real-time flight status based on the fixed-time convergent differentiator; Step 3: Build an aircraft three-channel attitude error tracking Model; Step 4: Construct an active disturbance rejection control system, use the real-time flight status of the aircraft, and generate real-time aerodynamic rudder swing commands through the active disturbance rejection control system. The invention can effectively reduce the development and production costs of my country's aircraft, and provide technical support for improving my country's aviation strength.

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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