Aircraft guidance and control integrated method based on observer technology

Abstract

The invention relates to an aircraft guidance and control integrated method based on an observer technology, and the method comprises the steps: building a missile guidance and control integrated model, and converting the missile guidance and control integrated model into a strict feedback nonlinear mathematic model; and designing a multi-sliding-mode-surface backstepping controller by combining variable structure sliding mode control and backstepping control based on the generated strict feedback nonlinear mathematical model. According to the method, the design of a control algorithm is facilitated, and by designing a composite item D, the sliding mode surface is stable and reachable, and the differential explosion phenomenon is avoided; an initial value attenuation term is introduced tooptimize a sliding mode surface, so that the amplitude of a control signal is reduced, and saturation of an actuating mechanism is prevented; and the second-order disturbance observer is used for carrying out observation compensation on the composite item D, so that the anti-interference capability and robustness of the system are improved.

Description

technical field [0001] The invention relates to the field of aircraft guidance and control, in particular to an integrated method for aircraft guidance and control based on observer technology. Background technique [0002] The traditional missile guidance control algorithm has many disadvantages because of the separate design. In the hypersonic flight environment or when the target has large maneuvers, the time constant difference between the guidance loop and the control loop is small, and the coupling is more serious. The separate design often causes the terminal guidance accuracy to decrease or even the missile to lose control. [0003] The integrated control method is a method that does not rely on the assumption of spectral separation. This method will comprehensively design the two loops of guidance and control, and fully consider the mutual influence between the two loops, which is a research hotspot in the field of guidance and control at present. [0004] The exi...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an integrated method of aircraft guidance and control based on observer technology, which solves the problems that the existing integrated guidance and control algorithm is not yet mature, the control algorithm is complicated, and the phenomenon of differential explosion is prone to occur

Images