﻿ 一种低散射金属支架的运动学计算及仿真 Kinematic Calculation and Simulation of a Low Scattering Metal Pylon

Mechanical Engineering and Technology
Vol.06 No.01(2017), Article ID:20136,10 pages
10.12677/MET.2017.61010

Kinematic Calculation and Simulation of a Low Scattering Metal Pylon

Jiaxing Hou, Wuyi Chen

School of Mechanical Engineering and Automation, Beihang University, Beijing

Received: Mar. 11th, 2017; accepted: Mar. 28th, 2017; published: Mar. 31st, 2017

ABSTRACT

A low scattering metal pylon, mainly used for target supporting in electromagnetic scattering measurement, is important to design and manufacture stealth weapons. The target positioning structure and overall stiffness of the pylon are very important when the RCS measurement is carried out in the compact range. This paper analyzed the structural characteristics of an oval metal pylon and calculated position parameters of the space rotating shaft. We obtained the curve of motion by mechanical analyses under a 200 Kg load and a kinematic simulation using ADAMS, and the curve provides an effective reference for the design and manufacture of driving devices of such metal pylons.

Keywords:Electromagnetic Scattering, Metal Pylon, Kinematics Calculation, Simulation Analysis

1. 引言

2. 低散射金属支架的基本结构

(a) 金属支架基本结构 (b) 橄榄形截面形状

Figure 1. The structure of metal pylon

3. 支架空间转轴的计算

3.1. 计算欧拉角、欧拉旋转矩阵

(a) 支架放倒时的初始位姿及人字形地坑夹角 (b) 支架起竖时的位姿

Figure 2. The configuration when the pylon is laid down and erected

Figure 3. The Euler angle formed by the initial and final coordinate

Figure 4. The global coordinate system of compact field

4. 对支架进行力学仿真

4.1. 刚、强度分析

4.2. 动力学分析

Table 1. Static analysis results and safety factor calculation of the pylon

Table 2. Dynamic analysis results of the pylon

(a) 一阶模态 (b) 二阶模态(c) 三阶模态

Figure 5. Modal shapes of various orders

6. 结论

Figure 6. The physical model established in CATIA

Figure 7. The diagram of angular velocity of pylon with respect to time

Figure 8. The diagram of angular acceleration of pylon with respect to time

Figure 9. The diagram of driving torque of pylon with respect to its angle

Kinematic Calculation and Simulation of a Low Scattering Metal Pylon[J]. 机械工程与技术, 2017, 06(01): 68-77. http://dx.doi.org/10.12677/MET.2017.61010

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