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A Design Method of Optimal Vibration Control System Based on Non-probabilistic Reliability Optimization

An active control system and optimal control technology, applied in the direction of non-electric variable control, control/regulation system, mechanical oscillation control, etc., can solve the problems of reporting and no technology

Active Publication Date: 2018-06-29
BEIHANG UNIV
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  • A Design Method of Optimal Vibration Control System Based on Non-probabilistic Reliability Optimization
  • A Design Method of Optimal Vibration Control System Based on Non-probabilistic Reliability Optimization
  • A Design Method of Optimal Vibration Control System Based on Non-probabilistic Reliability Optimization

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[0088] consider as figure 1 In the cantilever beam structure shown, the cantilever beam is initially disturbed in freedom, and the displacement is 5mm. The controller is designed by using the invention, so that the maximum displacement of the cantilever beam's degree of freedom is less than 1.1mm after 0.05s. The driver is located at the center of the cantilever beam, ten sensors are located under the cantilever beam, and all states of the cantilever beam are estimated by the observer, and then transmitted to the controller, and the controller applies the voltage signal to the cantilever beam after calculation. at the center of the surface. The geometric dimensions and material properties of the cantilever beam structure are shown in Table 1.

[0089] Table 1 Geometric dimensions and material properties of the cantilever beam structure

[0090]

[0091] The first step: First, use the large-scale commercial finite element analysis software ANSYS to carry out finite element...

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Abstract

The invention relates to a nonprobability reliability optimization based design method of a vibration optimal control system. According to the method, a finite element equation of structural vibration is converted into a state space form via variable substitution, and a state space control equation of structural vibration is established; a nonprobability reliability analysis theory of an active control system of structural vibration is provided; and based on the provided nonprobability reliability analysis theory, reliability optimization is carried out on a controller obtained via an optimal control theory, and a closed-loop controller satisfying the reliability index is obtained. The uncertainly of a closed-loop control system is overcome in the aspect of reliability, and the problems that optimal control cannot satisfy the reliability requirement and robust control is too conservative can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of active control of structural vibration, in particular to a method for selecting an optimal control weighting function based on non-probabilistic reliability optimization. Background technique [0002] With the development of my country's aerospace technology, the requirements for the structural performance of aerospace equipment are getting higher and higher. Under the premise that the static strength of the structure can meet the design requirements, the requirements for structural vibration are becoming increasingly stringent. Especially in the field of aerospace, flexible structures with low stiffness and large size have become an important development trend. Such as space deployable antennas, spacecraft flexible robotic arms, solar panels and their supporting structures. Due to the small structural damping in space, these flexible structures will produce a continuous vibration response once disturbe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D19/02
CPCG05D19/02
Inventor 王晓军李云龙邱志平王冲许孟辉王磊陈贤佳郑宇宁
Owner BEIHANG UNIV
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