机械产品设计缺陷的辨识模型与方法及其在机械传动系统中的应用研究

发布时间：2018-01-03 01:27

  本文关键词：机械产品设计缺陷的辨识模型与方法及其在机械传动系统中的应用研究　出处：《电子科技大学》2014年博士论文　论文类型：学位论文

  更多相关文章： 设计缺陷 辨识 约束模型 回归分析 验证树 约束关系网 免疫辨识 仿真验证

【摘要】：机械产品的验证工作是机械产品设计过程中的重要环节,由于验证系统的不完备性常导致其不能及时地发现机械产品设计中存在的缺陷,降低了机械产品的设计和开发效率,增加了机械产品设计成本。基于零部件设计参数之间的约束关系所建立的设计缺陷辨识模型,可在机械产品的设计阶段快速查找和准确定位出机械产品中存在的设计缺陷,有效提高机械产品的设计质量和开发效率。论文以机械传动系统为研究对象,建立了其约束模型,分别对其强度设计缺陷、装配设计缺陷和可加工性设计缺陷等设计缺陷的辨识模型与修正方法进行了较为深入系统的研究。1.基于非圆直齿轮副主从动轮之间的约束模型,提出了非圆直齿轮副的设计缺陷辨识模型与修正方法。分析了非圆直齿轮和高阶椭圆锥齿轮节面产生不连续点和尖点的原因,给出了判断其节面出现不连续点的准则。针对高阶阿基米德螺线锥齿轮和高阶二次曲线锥齿轮设计过程中节面出现的尖点问题,采用刀具节面替换非圆锥齿轮尖点处的节面,实现了对其节面尖点设计缺陷的修正。2.提出了基于回归分析模型的机械产品设计缺陷辨识方法。以球笼式等速万向联轴器为研究对象,将其内外沟道的接触应力作为强度判断的依据,将历史设计方案中影响零部件接触应力的设计参数作为因变量,建立接触应力与各相关影响因素的回归方程,通过拟合后的回归方程分析各因素对内外沟道强度的影响程度,计算出各影响因素的最大拟合误差值。将新设计方案中影响零部件接触应力的设计参数代入回归方程,求得参数设计值与回归方程的输出值之间的差值,将此差值与回归方程最大拟合误差值进行对比分析,辨识出了球笼式等速万向联轴器设计中存在的强度设计缺陷。3.提出了基于验证树模型的机械产品装配设计缺陷的辨识方法。针对机械产品设计中的装配约束验证问题,采用构造装配约束验证树的方法,将机械产品设计中存在装配约束关系的信息存储在树的节点中,将修改后的设计参数存入修改器,使用监视器来监视修改器内容的变化并对验证树进行实时更新,通过验证分析器调用监视器中堆栈信息来决定验证工作的启停,实现了装配约束关系的动态、关联验证。开发了一个动态关联式装配验证原型系统,采用该系统对驱动腿筒件装配体进行了设计缺陷辨识。4.研究了基于约束关系网的机械产品设计缺陷辨识模型与修正方法。提出了机械产品装配设计参数与其约束判定函数的关联方法,研究了装配约束关系网中节点的数据结构,给出了装配约束关系网的构建方法,描述了装配约束关系网的禁忌表访问方式,在此基础上提出了基于装配约束关系网的装配设计缺陷的辨识模型与方法。从装配约束关系网中的设计缺陷节点出发,以约束路径的权值之和为目标函数,采用蚁群算法对装配设计缺陷的修正路径进行了优化,采用该方法对膜片离合器进行了装配设计缺陷的辨识与修正。5.提出了基于人工免疫原理的机械产品设计缺陷辨识方法。将机械产品中零部件的几何约束关系规约为设计缺陷判别函数,在对零部件的几何约束编码的基础上建立了机械产品的装配约束关系矩阵,采用有向图存储装配约束关系矩阵信息,有向图中的节点标识零件编号,节点的数据结构存储零件的设计参数,弧的权值标识几何约束的类型。将有向图中弧的权值作为抗原,设计缺陷作为抗体,依据抗原基因与抗体基因的亲和度来决定抗体的变异规则,通过对抗体的剪切、拼接与替换等变异操作来识别抗原,基于对有向图中弧的权值的解码分析实现了机械产品设计缺陷的动态辨识。6.提出了高阶非圆齿轮副的根切、齿顶过切和节曲线干涉等设计缺陷的仿真验证辨识方法。建立了非圆锥齿轮齿廓产形刀具的精确数学模型,基于非圆齿轮与其齿廓产形刀具之间以及主从动轮节曲线之间的啮合关系,提出了高阶非圆锥齿轮的齿廓产形算法和主从动轮之间啮合运动的仿真算法。在此基础上建立了高阶非圆锥齿轮副的仿真验证模型,提出了高阶椭圆齿轮副根切和齿顶过切等设计缺陷的修正方法。
[Abstract]:Mechanical product verification is an important step in the design process of mechanical products, due to the incompleteness of verification system often leads to its not timely find defects in mechanical product design, reduces the efficiency of design and development of mechanical products, increase the cost of design of mechanical products. The design defects identification model of constraint relation of parts design based on the parameters, can design defects in mechanical products in the design stage to quickly find the mechanical products and accurate positioning, improve the design quality and efficiency of development of mechanical products. The paper adopts mechanical transmission system as the research object, establishes the constraint model, respectively, on the strength of design flaws, identification and correction method model of assembly design defects and workability design defects and other defects in the design of.1. systematic non-circular spur gear based on The constraint model between driving and driven wheels, the non-circular vertical design flaw identification model of gear pair and correction method. Analysis of the causes of non circular gear and high order elliptical bevel gear section has discontinuous points and a sharp point, given the section surface discontinuities appear sharp point needle criteria. The high order Archimedes spiral bevel gear bevel gear and the Takahashi Fuji curve in the design process of section, section by section surface replacement of noncircular bevel gear cutter tip point, the modified.2. on the plane point defects in the design proposed design flaw identification method of mechanical products based on regression analysis model. With the ball type constant speed universal coupling as the research object, the inner and outer channel contact stress strength as the basis for judgment of history in the design of design parameters influence the contact stress of the parts as the dependent variable, establish contact The regression equation of force and the related influencing factors, through regression analysis of the influence of various factors on the inner and outer channel strength, calculate the maximum fitting error factor values of each influence. The new design scheme in the influence of design parameters of parts into the contact stress of the regression equation, the parameter difference between the output and the design value the regression equation of value, the difference with the regression equation of the maximum fitting error value were compared and analyzed to identify the strength design defects in.3. rzeppa constant velocity joint in the design of the proposed identification method of mechanical product assembly design defect verification tree model based on assembly constraint. According to the mechanical product design verification problem, method the structure of assembly constraint verification tree, assembly relationship information will exist in design of mechanical products stored in the tree node, the modified design The parameters to modify, use the monitor to monitor the modifier content changes and real-time updating of the authentication tree, by verifying the call stack information analyzer monitor to determine the verification work of start and stop, to achieve a dynamic, assembly constraint relationship verification. The development of a dynamic association assembly verification prototype system for driving legs cylinder assembly is designed to identify defects of.4. mechanical product design defect identification model and correction method based on the constraint relation net system is proposed. The design parameters of mechanical assembly and constraint decision function correlation method, the data structure of the assembly constraint relationship of nodes in the net, gave the construction method of assembly constraints the relationship between network, describes the assembly relationship network tabu list access method is proposed on the basis of assembly design and assembly constraint relations based on Network The identification model and method of defect. Starting from the design defects of node assembly relationship network, to the right path constraints and objective function, using ant colony algorithm modified path assembly design of defects were optimized by the method of the identification of the diaphragm clutch assembly design defects with the modified.5. is proposed defect identification method of Mechanical products based on artificial immune principle. The geometric constraint relationship specification parts in mechanical products design defects based on geometric constraint discriminant function, encoding of spare parts is established on the assembly relation matrix of mechanical products, the matrix of directed graph and storage assembly relationship information, a node ID number to parts of the map, the design parameters of structure parts data storage node, identifies the type weights arc. The geometric constraint will be as to the graph arc weights Design defects as antigen, antibody, antigen and antibody affinity for gene gene to determine the variation rules of antibodies, the antibody of shear, splicing and substitution mutation operation to identify antigens based on directed graph decoding analysis arc weights to realize the dynamic identification of.6. defects in the design of mechanical product is proposed undercutting high-order circular gear, tooth top simulation identification method for design defects cutting and pitch curve interference. A mathematical model of noncircular bevel gear tooth profile of cutter, non-circular gear tooth profile and shape tool meshing relationship between driving and driven wheels and the pitch curve based on the proposed the simulation algorithm of meshing motion between high-order cone gear tooth profile shape algorithm and the driven pulley. Based on the simulation model of high order cone gear pair, put forward the high order elliptic gear Vice undercutting and tooth top modified method cutting design defects.

【学位授予单位】：电子科技大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TH122
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本文编号：1371790