發(fā)布時間：2018-11-08 14:11

【摘要】：隨著科學技術(shù)不斷發(fā)展和社會的不斷進步,信息越來越被各個國家所重視,成為一種重要的資源。太空天線作為最主要的信息接收裝置,它的發(fā)展越來越多的受到各個國家的關(guān)注。環(huán)形桁架式可展開天線由于其折疊比大,結(jié)構(gòu)形式簡單,口徑大,并且天線的質(zhì)量不會隨著天線直徑范圍的增大而增加太多等一系列的優(yōu)點,使得環(huán)形桁架式天線具有廣闊的應用前景,被越來越多的國家所關(guān)注。本文將基于對環(huán)形桁架式天線設(shè)計的基礎(chǔ)上,對天線進行了理論方面的分析,可以為以后天線的相關(guān)研究提供參考。本文完成了對環(huán)形桁架式可展開天線機構(gòu)進行了方案設(shè)計,并利用Pro/E軟件進行了天線機構(gòu)的三維建模,基于D-H參數(shù)法對天線機構(gòu)的基本單元進行了運動學分析,對環(huán)形桁架式天線機構(gòu)的基本單元進行運動學性能的分析。同時利用ADAMS軟件對天線機構(gòu)基本單元進行了過程和仿真分析,求得天線機構(gòu)基本單元在展開過程中桿件的展開速度和加速度。誤差的存在會造成機構(gòu)在運動的過程中不能按照預定的軌跡進行運動,本文考慮了天線桿件的加工誤差和鉸鏈的間隙誤差這兩個方面的誤差對于天線機構(gòu)展開的影響,通過對零件的加工誤差和鉸鏈的間隙誤差進行詳細的分析,得到當天線機構(gòu)可以正常展開時,天線機構(gòu)鉸鏈所允許的最大間隙。利用ANSYS對環(huán)形桁架式天線機構(gòu)完成了在完全展開之后的結(jié)構(gòu)動力學分析和模態(tài)分析,得到了天線機構(gòu)的前十階固有頻率,并對結(jié)果進行分析;考慮到不同的天線材料和不同的天線截面面積對于天線機構(gòu)頻率的影響,完成了當選取不同材料和不同的截面面積時,天線機構(gòu)固有頻率的變化;最后利用ANSYS對天線機構(gòu)進行了優(yōu)化。本文對環(huán)形桁架式可展開天線機構(gòu)進行了運動學動力學分析、誤差分析、模態(tài)分析以及結(jié)構(gòu)優(yōu)化等方面的研究,并且取得了階段性成果,為后來的科研人員從事環(huán)形桁架式可展開天線的研究提供了一定的理論依據(jù)和參考。
[Abstract]:With the development of science and technology and the progress of society, information has been paid more and more attention to by all countries and become an important resource. As the most important information receiving device, the development of space antenna attracts more and more attention from various countries. The annular truss deployable antenna has a series of advantages, such as large folding ratio, simple structure, large aperture, and the mass of the antenna will not increase too much with the increase of the antenna diameter range. The annular truss antenna has a broad application prospect and has been paid more and more attention to by more and more countries. Based on the design of the annular truss antenna, this paper makes a theoretical analysis of the antenna, which can provide a reference for the related research of the antenna in the future. In this paper, the scheme design of the annular truss deployable antenna mechanism is completed, and the 3D modeling of the antenna mechanism is carried out by using Pro/E software. The kinematics analysis of the basic elements of the antenna mechanism is carried out based on the D-H parameter method. The kinematics performance of the basic elements of the annular truss antenna mechanism is analyzed. At the same time, the process and simulation analysis of the basic elements of antenna mechanism are carried out by using ADAMS software, and the expansion speed and acceleration of the basic elements of the antenna mechanism are obtained. The existence of the error will cause the mechanism to be unable to move according to the predetermined trajectory during the process of motion. In this paper, the effect of the errors of the processing error of the antenna rod and the clearance error of the hinge on the expansion of the antenna mechanism is considered. By analyzing the machining error of parts and the clearance error of hinge in detail, the maximum clearance of the hinge of antenna mechanism is obtained when the antenna mechanism can be unfolded normally. The structural dynamics analysis and modal analysis of the ring truss antenna mechanism are completed by using ANSYS. The first ten natural frequencies of the antenna mechanism are obtained and the results are analyzed. Considering the influence of different antenna material and antenna cross-section area on the frequency of antenna mechanism, the natural frequency of antenna mechanism is changed when different materials and different cross-section area are selected. Finally, the antenna mechanism is optimized by ANSYS. In this paper, kinematics and dynamics analysis, error analysis, modal analysis and structural optimization of ring truss deployable antenna mechanism are studied. It provides some theoretical basis and reference for the research of ring truss deployable antenna.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN820

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本文編號：2318721