Nonlinear system miss distance analysis method

A technology of nonlinear systems and analysis methods, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as low computational efficiency, long computational time, and large computational load

Inactive Publication Date: 2018-03-16
XI AN JIAOTONG UNIV
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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

Method used

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  • Nonlinear system miss distance analysis method
  • Nonlinear system miss distance analysis method
  • Nonlinear system miss distance analysis method

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Embodiment Construction

[0083] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0084] 1. Use UT transformation to calculate the gain of the nonlinear link in the nonlinear guidance system at each moment. The specific process is as follows:

[0085] 1) Approximate linearization of nonlinear output

[0086] see figure 1 , w is the random input of the system, G(t) is the time-varying input matrix, C(t) is the time-varying output matrix, x is the state variable, b and x are the mean values ​​of w and x respectively, u and r are both zero mean independent random variables, and w b u and x x r hold. f x is the output of the nonlinear link. In order to simplify the writing, f x is replaced by y in the following content. the y out is the system output.

[0087] The random input quantity w of the system enters the nonlinear guidance system through the time-varying input matrix G(t), and affects the state quantity x ...

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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 ...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 蔡远利李红霞
Owner XI AN JIAOTONG UNIV
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