Distributed composite anti-interference attitude control method of BTT flying machine

Abstract

The invention discloses a distributed composite anti-interference autopilot of a BTT flying machine and a design method thereof. The distributed composite anti-interference autopilot of the BTT flying machine and the design method thereof are suitable for high-precision anti-interference attitude control of the BTT flying machine, and solve the technical difficulty of time-varying characteristic, uncertainty, nonlinearity strong coupling and flight parameter perturbation of a BTT flying machine object. The method includes the steps that firstly, filtering processing is conducted on a guidance instruction through a tracking differentiator technology, so that a smooth transient process is obtained; secondly, a time varying uncertain item and a nonlinearity strong coupling item of an object model are used as internal disturbance of the object, the internal disturbance and external disturbance are integrated to be lumped disturbance, and an ESO is designed so that the lumped disturbance can be estimated; finally, the distributed composite anti-interference autopilot is designed, an appropriate control parameter is set, the stability of a closed-loop system is guaranteed, the anti-jamming capability and tracking precision of the system are improved, and therefore the technical difficulty of attitude control over the BTT flying machine is solved.

Description

technical field [0001] The invention relates to a distributed composite anti-jamming attitude controller and its construction method for a bank turn (BTT) aircraft, specifically a BTT aircraft attitude control method based on a tracking differentiator, state feedback and an expanded state observer, belonging to aircraft The technical field of attitude control. Background technique [0002] Bank and turn (BTT) technology is a key technology used to improve the maneuverability of aircraft in the field of aircraft control technology in the world today. The so-called leaning turn means turning by leaning. The side slip and turn (STT) control method realizes the turn through the side slip. The STT control method is more suitable for short- and medium-range small-maneuvering aircraft, but for super-large maneuvering combat aircraft and long-range interception air-to-air aircraft, it is required that the aircraft has low resistance, large maneuvering overload, or a large lift-to-...

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Problems solved by technology

Literature (Fu LC, Chang WD, Yang JH, Kuo TS.Adaptive robust bank-to-turn missile autopilot design using neural networks[J].Journal of Guidance Control and Dynamics,1997,20(2):346-354) proposed A BTT aircraft autopilot design method based on neural network algorithm has superior control performance in theory, but because the neural network algorithm itself is too complex, it is not conducive to engineering applications; literature (Tan F, Duan GR.Global stabilizing controller design for linear time-varying systems and its application on BTT missiles[J].Journal of Systems Engineering and Electronics,2008,19(6):1178-1184) proposed a new scheduling control method based on characteristic structure configuration theory , instruction tracking performance and stability can be guaranteed to a certain extent, but there is a lack of effective anti-interference strategies and mechanisms; literature (Li SH, Yang J.Robust autopilot design for bank-to-turn missiles using disturbance observers[J].IEEE Transactions on Aerospace and Electronic Systems, 2013, 49(1):558-579) proposed a robust autopilot design method for BTT aircraft based on disturbance observers, using disturbance observers to eliminate nonlinear coupling and external disturbances, with superior Anti-interference performance, but lack of command noise filter preprocessing, no pre-arranged transition process of command signal, in the case of time-varying input signal and polluted by random noise, the tracking performance will be affected to a certain extent

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