并联天线的动力学建模与振动特性分析

IF 1 4区工程技术 Q4 ENGINEERING, MECHANICAL

Mechanical Sciences Pub Date : 2022-12-19 DOI:10.5194/ms-13-1019-2022

Guoxing Zhang, Jianliang He, Jinwei Guo, Xinlu Xia

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引用次数: 2

摘要

摘要研究机械系统的振动特性是高端设备稳定可靠运行的必要步骤。提出了一种6自由度并联机构作为天线的支撑机构。首先，建立了运动平台和机构分支的动力学方程。基于牛顿-欧拉方法推导了该机构的闭式动力学。此外，基于振动理论，建立了并联天线的振动方程，得到了天线的固有频率、位移响应和振动频率之间的关系。之后，1.8 m孔径天线是基于MATLAB软件仿真开发的。模拟了并联天线在空载和负载条件下的驱动力。最后，基于Adams软件振动分析模块对初始位置和滚转（20∘）的固有频率和振动模式进行了仿真。此外，在谐波响应分析的基础上，研究了移动平台的位移响应与谐振频率之间的关系。基于动态模型的控制策略提高了并联天线的控制精度。该研究工作为并联天线的动态特性分析和工程应用提供了保障。

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Dynamic modeling and vibration characteristics analysis of parallel antenna

Abstract. Research on the vibration characteristics of the mechanical systems is a necessary step for the stable and reliable operation of high-end equipment. The 6 degrees of freedom parallel mechanism is proposed for the supporting mechanism of the antenna. First, the dynamic equations of the moving platform and branch of the mechanism are established. The closed-form dynamics of the mechanism are derived based on the Newton–Euler method. In addition, the vibration equation of the parallel antenna is established based on the vibration theory, and the relationship between the natural frequency, displacement response, and vibration frequency is obtained. Afterward, the pitch and roll poses of a 1.8 m aperture antenna are developed based on a MATLAB software simulation. The actuation forces of parallel antenna under no-load and load conditions are simulated. Finally, the natural frequencies and vibration modes of the initial position and roll (20∘) are simulated based on the Adams software vibration analysis module. Furthermore, the relationship between the displacement response of the moving platform and the resonant frequency is studied based on the harmonic response analysis. The control strategy based on the dynamic model improves the control accuracy of parallel antenna. This research work provides a guarantee for the dynamic characteristics analysis and engineering application of parallel antenna.

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来源期刊

Mechanical Sciences ENGINEERING, MECHANICAL-

CiteScore

2.20

自引率

7.10%

发文量

审稿时长

29 weeks

期刊介绍： The journal Mechanical Sciences (MS) is an international forum for the dissemination of original contributions in the field of theoretical and applied mechanics. Its main ambition is to provide a platform for young researchers to build up a portfolio of high-quality peer-reviewed journal articles. To this end we employ an open-access publication model with moderate page charges, aiming for fast publication and great citation opportunities. A large board of reputable editors makes this possible. The journal will also publish special issues dealing with the current state of the art and future research directions in mechanical sciences. While in-depth research articles are preferred, review articles and short communications will also be considered. We intend and believe to provide a means of publication which complements established journals in the field.