Nonlinear system miss distance analysis method

Abstract

Provided is a nonlinear system miss distance analysis method. UT transformation is adopted to calculate the gain of a nonlinear link in a nonlinear guiding system at each moment; the gain of the nonlinear link is brought into the nonlinear guiding system, and the nonlinear guiding system is converted to a linear guiding system; and a direct adjoint analysis method is adopted to perform miss distance analysis on the linear guiding system, to obtain a miss distance. The miss distance analysis method can be directly applied to miss distance analysis of a strong-nonlinear guiding system, and the method has good calculation efficiency and feasibility. The direct adjoint analysis method has good precision on miss distance analysis of the linear guiding system.

Description

technical field [0001] The invention belongs to the field of aircraft control, in particular to a nonlinear system miss-target analysis method. Background technique [0002] For precision guided weapons, the amount of misses is the main performance index to measure the guidance accuracy of the guidance system. Since the beginning of the 21st century, with the vigorous development of microelectronics technology and control theory, improving the guidance accuracy has become the key direction of missile weapon research and development. On the one hand, technological innovation provides a solid foundation for improving missile guidance performance. The emergence of a series of high-precision seekers such as laser, infrared, and radio frequency, as well as improvements in the control of engines, projectile materials, and steering gears, have promoted the improvement of missile guidance accuracy. On the other hand, due to changes in combat scenarios, the main demand for weapons ...

AI Technical Summary

Problems solved by technology

However, its disadvantages are: (1) When using the direct statistical linearization method (CADET) to calculate the nonlinear link gain of the nonlinear guidance system, the prior information of the probability density function of the random input signal of the nonlinear link is required

At the same time, the integral operation is involved in the gain operation, because this operation takes a long time, it affects the operation efficiency of the method

(2) When using the adjoint analysis method to analyze the off-target amount in the linear system, it is necessary to draw the accompanying system block diagram according to the original system guidance system block diagram to perform the off-target amount analysis, which also affects the timeliness of the method from another aspect

[0010] (1) It is only suitable for linear systems or weak nonlinear systems, and cannot perform off-target analysis for strong nonlinear systems;

[0011] (2) The amount of calculation is large, and the calculation efficiency is not feasible

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