A Three-Order Model-Based Integrated Design Method for Strapdown Guidance and Control

Abstract

The invention discloses a three-order model-based integrated design method for strapdown guidance and control. The method includes the following steps: the first step is to establish a three-order guidance and control integrated design model; the second step is to clearly consider the strapdown The design task of the integrated guidance and control algorithm constrained by the field of view of the joint seeker; the third step is to construct the auxiliary system and design the first layer of expected virtual control quantity η d , and process it through an approximate saturation function to obtain the first layer of virtual control quantity η c ; The fourth step: use the Barrier Lyapunov function to design the virtual control quantity ω of the second layer zc ;The fifth step, design the actual rudder deflection angle command δ z ; The sixth step, combining the third to fifth steps, obtains the integrated guidance and control algorithm considering the constraints of the field of view; the seventh step, checks the performance of the integrated guidance and control algorithm. The method of the invention can realize the precise strike on the target and ensure that the constraints of the field of view of the strapdown seeker are satisfied.

Description

technical field [0001] The invention belongs to the field of aerospace, and relates to an integrated guidance and control design method, in particular to an integrated guidance and control design method based on a third-order model considering the field of view constraint of a strapdown seeker. Background technique [0002] It is of great significance to carry out the research on the integrated design of guidance and control under the all-strapdown detection and guidance system for the development of low-cost and high-performance tactical missiles. An important problem in the integrated design of strapdown guidance and control is to deal with the constraints of the seeker's field of view. From the perspective of the established guidance and control integrated design model, the main progress in this field includes the fourth-order model method and the second-order model method. The fourth-order model method is based on literature 1 "The guidance and control integrated design...

AI Technical Summary

Problems solved by technology

There are two main problems in this type of method: one is that the state variables such as pitch (yaw) angular rate are treated as bounded disturbances, which lack strict system stability guarantees; Algorithms are relatively complex

However, since the missile pitch rate signal is not an independent external signal, but is directly controlled by the pitch rudder deflection angle command, this design method essentially has the problem of controller cycle design

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