摘要

四轴飞行器目前属于火热的可垂直起落的飞行器，具有结构简单、动力强大、可用的行业范围大并且飞行时可靠性高，各种专业程度高的飞行器被各行各业所喜爱，因此，主流研究其专业化越来越密切。本文所设的无人机乃用于观察森林里的火情，是专行专业使用的。
本文对四轴飞行器的机构与原理先行分析，主要是设计四轴飞行器的结构部分，通过对机架里的主板、力臂与起落架等机械结构设计，选择合理的碳纤维复合材料来构造机架，通过三维软件来建模，组成一个四轴飞行器的机架，对于云台机械结构的设计分析，利用齿轮减速机构来细分转动角度，通过支架来支撑摄像机。
叙述了森林火情探测的四轴飞行器的设计过程，从动力部分、结构部分到控制部分。
 
关键词 四轴；飞行器；结构设计；碳纤维；机架；云台
 
Abstract
Four aircraft at present belongs to the hot axis can be vertical take-off and landing aircraft, has the advantages of simple structure, power strong, the available industry when flying range and high reliability, high degree of professional aircraft is enjoyed by all walks of life, therefore, the mainstream study its specialization is more and more closely. The uav used in this paper is used to observe the fire in the forest.
Four axis in this paper, the analysis of the mechanism and principle of aircraft, mainly design of aircraft structure parts, four axis through the frame in the motherboard, lever and the landing gear and other mechanical structure design, selecting rational carbon fiber composite materials to construct the frame, through 3 d software modeling, composed of a vehicle frame, four axis for head machinery design and analysis of the structure, gear reduction mechanism is used to segment the rotation Angle, through a bracket to support the camera.
This paper describes the design process of the four-axis aircraft in forest fire detection, from the power part, the structure part to the control part.
 
Keywords  our-axis  aircraft  structural design  carbon fiber  rack  head