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Chattering restraining method of optical axis of rapid deflecting mirror based on support vector machine

A support vector machine and support vector technology, applied in adaptive control, general control system, control/regulation system and other directions, can solve the problem of inverse hysteresis model being difficult to obtain, achieve high accuracy of boresight jitter, improve control accuracy, The effect of simplifying the model identification process

Inactive Publication Date: 2018-11-30
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology

Due to the characteristics of the model itself, it is difficult to obtain an accurate inverse hysteresis model, and compensation errors will be introduced during the compensation process, and it is also very sensitive to model parameters

Method used

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  • Chattering restraining method of optical axis of rapid deflecting mirror based on support vector machine
  • Chattering restraining method of optical axis of rapid deflecting mirror based on support vector machine
  • Chattering restraining method of optical axis of rapid deflecting mirror based on support vector machine

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Embodiment Construction

[0047]The present invention will be further described below in conjunction with specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not as a limitation to the present invention.

[0048] Such as figure 1 As shown, a support vector machine-based fast deflection mirror boresight chattering suppression method of this embodiment, the specific steps are as follows:

[0049] Modeling and identification of linear dynamics of fast deflecting mirrors. Fast deflecting mirror input u and linear model output represented by fast deflecting mirror linear dynamic model D( ) The relationship between. It can be expressed as

[0050]

[0051] In the formula, k is the constant gain introduced due to the quasi-static rate-independent hysteresis dynamics, θ is the actual output of the fast deflecting mirror, n and m are the order of the model, β i and η i Undetermined parameters for the model.

[0052]...

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Abstract

The invention discloses a chattering restraining method of optical axis of a rapid deflecting mirror based on a support vector machine. The chattering restraining method comprises the steps that modeling and identifying of rapid deflecting mirror linear dynamics are carried out, data collecting and processing are carried out, piezoelectric drive rapid deflecting mirror nonlinear hysteresis dynamics modeling is carried out, and the feed-forward feedback composite controller design of rapid deflecting mirror nonlinear hysteresis dynamics is carried out. Compared with the prior art, the chattering restraining method of the optical axis of the rapid deflecting mirror based on the support vector machine does not need parameter identifying of a specific hysteresis model, an accurate inverse piezoelectric hysteresis model is established based on an LS-SVM method and used for compensating the influence on the control precision of piezoelectric drive rapid deflecting mirror by the nonlinear hysteresis effect, and introducing compensating errors introduced by model parameter identifying is avoided; and meanwhile, a pruning method of support vector is designed to reduce model complexity and calculation time-consumption, the support vector of the model is removed, and the model identifying process is simplified; and on the basis of piezoelectric nonlinear hysteresis feed-forward compensating, feedback control is carried out on linear dynamics partial design of the piezoelectric drive rapid deflecting mirror, and control precision of the system is improved.

Description

technical field [0001] The invention relates to the field of active control of piezoelectric materials, in particular to a fast deflection mirror visual axis chattering suppression method based on a support vector machine. Background technique [0002] Fast deflecting mirrors are one of the important components of some precision optomechanical equipment, such as space laser communication, laser timing navigation, high-precision telescopes, surveillance and monitoring cameras, etc. The fast deflecting mirror is actively controlled by the micro-nano driver to achieve the deflection of the visual axis, thereby suppressing the vibration of the system's visual axis. The control accuracy and stability of the fast deflecting mirror determine the pointing accuracy and stability of the visual axis. [0003] Piezoelectric actuators have become one of the main choices of micro-nano actuators in fast deflecting mirrors due to their high precision and high bandwidth. However, in practica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 羊毅郝培育吴奇峰冯兴伟
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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