摘要机械产品的设计，一般分为传统设计和现代设计，优化设计是现代设计中运用较为广泛的一种。传统设计通常以调查分析为基础，将相同类型的产品作为参照，然后通过估算、经验比较或实验等方法来确定初步的产品设计方案。并对该产品的强度、刚度和稳定性等性能进行分析设计，检查该产品的各项性能能否满足设计要求。若无法满足，则需根据设计师的经验来判断和修改设计参数。实践证明，按照传统方法得出的设计方案，一般都存在较大改进和提高的余地。有此可得，传统设计方法受到经验、计算方法和手段等条件的限制，所以由传统方法得出的方案一般都不是最佳方案。52519

    为实现二级圆柱齿轮减速器的最小中心距的优化设计，在研究二级圆柱齿轮减速器优化设计目标、设计变量和约束条件的基础上，建立了优化设计数学模型。利用MATLAB的优化工具箱，对减速器进行优化设计，简化了复杂的编程，提高了设计效率和质量。从而使其结构紧凑以及制造成本降低，同时避免了传统方法采用计算量大且繁琐的手工计算或计算机语言传统求解方法。

毕业论文关键词：MATLAB；减速器；优化设计

Abstract Design of mechanical products, generally pided into the traditional design and modern design, optimization design is one of the types of which has been widely used in modern design. The method of traditional design is usually on the basis of investigation and analysis, as a reference to similar products, the initial scheme of product design is determined by estimating, experience, analogy or experimental methods. Then analysing and designing the product properties, such as strength, stiffness and stability , to check whether the performance meet the requirements of design index. If it can't meet, you can modify the design parameters according to the experience or intuitive judgment.  Practice has proved that according to the traditional methods of design, generally there is a big room for improvement and improve. Have this available, the traditional design is limited by experience, calculation methods and means , so the solution witch obtained by the traditional method is generally not the best one.

    In order to achieve the minimum centre distance of level 2 cylindrical gears reducer by optimization design, optimization design mathematical model is established on the basis of the research,which in the target of optimization design , design variables and constraints of level 2 cylindrical gear reducer. Using the MATLAB optimization toolbox optimize the gear reducer , which can simplify the complex programming and improves the design efficiency and quality. It can make the structure compactly , and reduce the manufacturing cost . At the same time ,it avoid the traditional method which with large amount of calculation and cumbersome hand computation or traditional evaluation methods by computer language.

Keywords:  MATLAB、Reducer、Optimization design

目  录

第一章  绪论--1

1.1 减速器的概述--1

1.2 国内外研究现状及存在问题--1

1.3 减速器的发展趋势 2

1.4 本课题研究的目的和意义-2

1.5 本课题研究的基本内容2

第二章 圆柱齿轮减速器的优化软件-3

2.1 MATLAB的概述-3

  2.1.1 MATLAB的产生与发展-3

  2.1.2 MATLAB的主要特点与优势3

  2.1.3 MATLAB系统的构成4

  2.2 MATLAB中最优化函数设计方法的介绍--4

      2.2.1 无约束最优化--4

      2.2.2 约束最优化-11

      2.2.3 MATLAB内置最优化函数--13

第三章 给定参数圆柱齿轮减速器的传统设计--16