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Simulation analysis method for effects of rotating part on flexible dynamics

A technology of rotating parts and simulation analysis, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as non-existence, achieve accurate positioning, accurate reproduction, and ensure normal flight and business operations.

Active Publication Date: 2013-11-27
SHANGHAI SATELLITE ENG INST
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  • Description
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Problems solved by technology

However, there is no such method in the prior art

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  • Simulation analysis method for effects of rotating part on flexible dynamics
  • Simulation analysis method for effects of rotating part on flexible dynamics
  • Simulation analysis method for effects of rotating part on flexible dynamics

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] refer to figure 1 , the method of the present invention comprises the following steps:

[0022] Step 1), analyzing the characteristics of the large rotating part, and establishing a dynamic model of the large rotating part.

[0023] Rotating parts are generally balanced when they leave the field, but there will still be residual static unbalance and residual dynamic unbalance. The residual static unbalance and residual dynamic unbalance are important indicators for evaluating the dynamic performance of rotating parts. . The disturbance torque of the rotating part can be caused by the residual static unbalance and the residual dynamic unbalance. Therefore, the dynamic model of the rotating part for outputting the disturbance torque can be created from the residual static unbalance and the residual dynamic unbalance. The residual static...

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Abstract

The invention discloses a simulation analysis method for effects of a rotating part on flexible dynamics. The simulation analysis method includes analyzing features of a large rotating part, and building a dynamic model of the large rotating part; performing structural dynamic analysis to flexible accessories of the large rotating part, generating a linearized vibration model described by a modal coordinate after modal truncation, building a multibody dynamic model with the flexible accessories according to a rigid body dynamic model; building a flexible satellite attitude dynamic and control system model based on the built models, and performing simulation by using the flexible satellite attitude dynamic and control system model; and performing time domain and frequency domain analysis to simulation data to obtain perturbation features. The simulation analysis method can be used not only for conformation of design results in attitude and obit control and dynamic design processes, but also for failure determination and inversion during obit operation. The simulation analysis method for the effects of the rotating part on flexible dynamics solves the practical engineering problem of the effects of the rotating part on flexible dynamics, and has the advantage that stability and reliability of platforms are improved.

Description

technical field [0001] The invention relates to structural dynamics and dynamics, more specifically, to a simulation analysis method for the influence of rotating parts on flexible dynamics. Background technique [0002] With the development of modern technology, the requirements for satellite pointing accuracy and stability, as well as long life and high reliability are increasing day by day. The modeling and analysis of flexibility dynamics has become an important topic in the field of aerospace research. [0003] During the flight and control process, the disturbing force (moment) and control force (torque) will not only cause the change of position and attitude, but also arouse the elastic vibration of the flexible attachment in the rotating parts, and the elastic vibration of the flexible attachment will further It affects the control accuracy of the satellite and the stability of the payload imaging. Especially when the periodic torque generated by the rotating parts...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 吕旺薛孝补陈静杨立峰朱海江
Owner SHANGHAI SATELLITE ENG INST
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