RV减速器的稳健设计方法研究

发布时间：2019-05-08 01:55

【摘要】：在传统的RV减速器设计中，没有考虑诸多可控因素和不可控因素对RV减速器传动机构质量特性的影响。而稳健设计作为一种新型提高产品质量的工程设计方法，运用到RV减速器设计中能很好地解决这一问题。因此，本论文基于稳健设计思想，对影响RV减速器质量特性的尺寸链装配误差、回差、传动误差等方面做了一定的研究和探讨，主要内容如下： (1) RV减速器的尺寸链制造误差的稳健设计。由于RV减速器组成零件偏少，属于少环尺寸链，而传统的尺寸链误差描述函数多用正态分布描述，这在少环尺寸链中不能完全适用，必将带来尺寸链误差难以准确控制这一缺点，本文提出运用分布来描述少环尺寸链的误差分布，建立以目标值微调的尺寸链加工误差控制模型，，运用稳健设计中扩大操作空间的设计思想，能有效地减小诸如RV减速器这样少环又有高精度要求尺寸链的误差，并以实际例子进行验证。 (2)利用Taguchi稳健设计思想对RV减速器的回差进行稳健设计。首先分析影响RV减速器回差的主要因素，并归纳出这些因素哪些可以作为设计变量（可控因素）哪些可以作为噪声因素（不可控因素）。建立可控因素与不可控因素水平表，分析目标值的归属类型，并选用合适的正交表格进行正交试验。运用考虑信噪比的Taguchi稳健设计方法对试验结果进行分析并得出减小回差的最佳组合，并与单纯正交试验直观分析法做对比，分析优劣，最后得出比实例拥有更小回差的稳健设计参数组。 (3)针对RV减速器传动误差控制，我们首先分析影响铰接四杆机构的误差的主要因素，考虑各杆的制造误差，提出将四杆机构转动角度作为噪声因素引入到稳健设计中去，建立以四杆长度为设计参数，转角为噪声因素的正交试验表，并利用VB和Matlab软件进行正交试验中涉及的运算，得出一组满意的稳健设计参数组。 (4)进行RV减速器的摆线针轮行星减速部分的稳健设计。在传统的优化设计的基础之上，将不可控因素的稳健性作为约束条件考虑到优化模型中，在约束函数的优化设计中引入使其灵敏度为最小的目标函数来实现稳健性的设计方法。建立与之对应的RV减速器摆线针轮行星减速部分的稳健优化的数学模型，并用实例对模型进行验证计算。
[Abstract]:In the design of the traditional RV reducer, the influence of many controllable and uncontrollable factors on the quality characteristics of the transmission mechanism of the RV reducer is not considered. As a new engineering design method to improve product quality, robust design can solve this problem very well in the design of RV reducer. Therefore, based on the idea of robust design, this paper does some research and discussion on the assembly error, return error and transmission error of dimension chain which affect the quality characteristics of RV reducer. The main contents are as follows: (1) robust design of dimension chain manufacturing error of RV reducer. Because the RV reducer has fewer parts and belongs to the small ring size chain, the traditional dimension chain error description function is mostly described by normal distribution, which can not be fully applied in the small ring size chain. This paper proposes to use the distribution to describe the error distribution of the small ring dimension chain, and to establish the machining error control model of the dimension chain with the target value fine adjusted. The design idea of expanding operation space in robust design can effectively reduce the error of dimension chain such as RV reducer with few rings and high precision, and it is verified by a practical example. (2) using the idea of Taguchi robust design to design the backlash of RV reducer. This paper first analyzes the main factors that affect the return error of RV reducer, and sums up which factors can be used as design variables (controllable factors) and which can be used as noise factors (uncontrollable factors). The level tables of controllable factors and uncontrollable factors were established, the types of target values were analyzed, and the orthogonal test was carried out with appropriate orthogonal tables. The Taguchi robust design method considering the signal-to-noise ratio is used to analyze the test results and obtain the best combination to reduce the return error, and compared with the simple orthogonal test intuitive analysis method to analyze the advantages and disadvantages of the test results. Finally, the robust design parameter group with smaller backlash than the example is obtained. (3) in view of the transmission error control of RV reducer, we first analyze the main factors that affect the error of the hinged four-bar mechanism, consider the manufacturing error of each rod, and propose that the rotation angle of the four-bar mechanism be introduced into the robust design as a noise factor. An orthogonal test table with four bar length as design parameter and rotation angle as noise factor is established, and a set of satisfactory robust design parameters is obtained by using VB and Matlab software to carry out the operation involved in orthogonal test. (4) the robust design of the planetary deceleration part of cycloidal pin wheel of RV reducer is carried out. On the basis of the traditional optimization design, the robustness of uncontrollable factors is considered as a constraint condition in the optimization model. In the optimization design of the constraint function, the objective function with the minimum sensitivity is introduced to realize the robustness design method. The mathematical model of robust optimization for the planetary deceleration part of cycloidal pin wheel of RV reducer is established and verified by an example.
【学位授予单位】：大连交通大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH132.46

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