Hierarchical dynamic inverse control method for flight vehicle based on sliding mode interference observer

Abstract

The invention discloses a hierarchical dynamic inverse control method for a flight vehicle based on a sliding mode interference observer. The hierarchical dynamic inverse control method comprises the steps of: 1, by considering multi-source interference suffered by the flight vehicle, building a multi-source interference system model based on an flight vehicle longitudinal dynamics model; 2, designing a sliding mode interference observer and estimating multi-source interference based on the multi-source interference system model built in the first step; the third step, constructing a hierarchical dynamic inverse composite controller based on the sliding mode interference observer in the second step, thus enabling speed and height of the flight vehicle to highly follow a reference instruction while compensating multi-source interference. The hierarchical dynamic inverse control method for the flight vehicle based on the sliding mode interference observer has the advantages of strong anti-interference capability, fast tracking speed, high control precision and the like, thus being applicable to tracking and controlling height and speed of the flight vehicle.

Description

technical field [0001] The invention relates to an aircraft hierarchical dynamic inverse control method based on a sliding mode disturbance observer, which is mainly applied to the speed and height tracking control of an aircraft system and belongs to the technical field of aircraft control. Background technique [0002] At present, some aircraft (such as hypersonic aircraft) have a large flight span and a complex flight environment, so most aircraft systems are affected by multi-source interference. Modular nonlinear dynamics, external disturbances and measurement errors, etc.; so the aircraft control system needs to have a certain degree of robustness. [0003] The composite anti-jamming controller designed by using the control theory method based on the disturbance observer has the ability of canceling the disturbance, which can ensure that the system meets the control performance requirements and at the same time makes the system have certain robustness. At present, for...

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Problems solved by technology

[0005] The problem solved by the technology of the present invention is: because some aircraft system models are inaccurate and affected by many disturbances, so in order to achieve high-precision control, the present invention provides a hierarchical dynamic inverse control method for aircraft based on a sliding mode disturbance observer, It is a hierarchical dynamic inverse compound control method with interference cancellation performance. A sliding mode interference observer is designed to estimate and compensate multi-source interference, so as to solve the problem of anti-interference tracking controller design of the aircraft system, and ensure the robustness of the system. Under the premise, realize the high-precision tracking control of the system

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