matlab基于多体系统传递矩阵法的旋翼无人机建模与分析研究

摘要针对传统的旋翼无人机动力学建模方法难以完善地考虑力和运动之间的相互耦合，并且存在求解阶次高、运算量大等缺点，提出了一种基于多体系统传递矩阵法的旋翼无人机新型建模方法。首先，利用该方法将整个系统拆分成零部件，建立每部分的传递方程；其次，将其按原有的规则拼装成整体，建立倾转旋翼无人机悬停状态下的动力学模型；然后，在此模型的基础上利用matlab软件求解系统的固有振动频率；最后分析系统的振动特性。该方法不需要建立复杂的总体动力学方程，化繁为简，程式化程度高，并且矩阵的计算相对简单，可以有效解决实际工程中复杂多体系统的建模分析问题。25578
关键词旋翼无人机建模多体系统传递矩阵法倾转旋翼无人机
毕业论文设计说明书外文摘要
Title Modeling and Analysis of Rotor UAVs Based on Transfer Matrix Method for Multibody System
Abstract
The modeling of rotor aircrafts has been researched with the conventional method of aerodynamics in recent years, which has the following disadvantages: the complex mutual coupling between force and motion, high orders of the resulting equations and large computation. A new multibody dynamics model of rotor unmanned aircraft using multibody systems transfer matrix method is presented in this study. Dividing system into several parts and calculating transfer matrix of each part, then Splicing parts by multiplying every matrix to obtain the overall matrix, we derive the model of the tilt rotor aircrafts in hovering. Then use matlab software to obtain nature vibration frequency, analyses vibration characteristics of the system .The method is highly stylized, does not require the establishment of general dynamic equation, and related calculations are simple. So it is an effectively solution to solve the engineering problem about the modeling and analysis of multibody system.
Keywords rotor aircraft modeling Transfer Matrix Method for Multibody System tilt rotor aircraft
目次
1 引言   1
1.1 研究背景   1
1.2 研究意义   1
1.3 倾转旋翼无人机建模研究现状   2
1.4 多体系统传递矩阵法   4
1.5 本文主要研究工作和组织结构   4
2 倾转旋翼机结构   6
2.1 建模思想   6
2.2 坐标系   6
2.3 结构分析   8
3 倾转旋翼无人机动力学建模   10
3.1状态矢量   10
3.2 各部分模型   10
3.3倾转旋翼机总体传递方程和传递矩阵   19
4   倾转旋翼无人机的特征方程和振动特性   21
4.1 特征方程和固有频率   21
4.2 参数选取   22
4.3 振动特性分析   22
结论与展望   25
致谢   26
参考文献   27
附录A XV-15倾转旋翼机基本参数   29
附录B MATLAB求解固有频率程序   30
1 引言
1.1 研究背景
无人机按照翼型通常可分为固定翼和旋翼无人机两种，相对固定翼无人机而言，旋翼无人机的机构较为复杂，但是具有以下优点：能够垂直起降；能够适应各种飞行环境；可进行多种飞行姿态的灵活转换，如前飞、俯仰、翻滚、悬停等。因此旋翼无人机技术成为近年来航空领域的热点课题，目前已经在军事、交通、环境监测等领域得到广泛应用。 matlab基于多体系统传递矩阵法的旋翼无人机建模与分析研究:http://www.youerw.com/zidonghua/lunwen_19426.html