机械运动系统行为结构时序优化及应用研究

发布时间：2018-02-04 02:51

本文关键词： 搭接网络行为原始分组连续关系运动循环图　出处：《上海交通大学》2011年硕士论文　论文类型：学位论文

【摘要】：机械运动行为结构时序优化即传统工艺动作时序关系优化过程,因而是机械产品优化设计的重要方法。由于缺乏合适的建模及计算机表达方法,目前在该层次进行计算机辅助时序优化的研究仍处于起步阶段。论文结合具有典型机械运动特征的粽子自动扎线技术,研究其工艺动作时序关系及自动化扎线原始行为结构生成方法,以及基于搭接网络的行为结构表达算法,并基于行为原始分组规则、行为时序配合关系约束来对行为结构进行优化,研究内容主要包括: 1.基于行为原始分组的行为关系时序优化研究。制定行为之间的连续关系规则并以此构建实现行为原始分组的数学模型,以实现将所有工艺动作的原始分组结果即原始行为结构通过计算机辅助的方式得到。并结合粽子自动扎线机实例进行了说明。 2.基于搭接网络的行为结构表达研究。将行为之间的时序关系运用搭接网络图进行表达,并对搭接网络表达的相应算法进行研究。 3.基于协调运动的行为结构时序优化。定义行为之间的先行运动关系和相依运动关系,并以此来对不同组之间行为进行时间约束,以实现在基于原始分组结果的原始行为结构中以添加先行运动关系和相依运动关系来对行为结构进行运动配合优化。并结合粽子自动扎线机做了实例说明。 4.对各行为节点进行分析,制定各节点的时间参数,并以此构建能通过计算机辅助由行为搭接网络图得到初步机械运动循环图的转换方法数学模型,并分析了如何在初步运动循环图的基础上添加运动性质和如何进行行为表达合并,以得到最终运动循环图。 5.分析了影响行为结构的主要因素:行为关系复杂性、整体工作周期、系统稳定性、行为结构所包含的行为数量,并对各影响因子的评价度进行了研究,然后给出了行为结构的评价方法。此外,还制定了方案可行性评价矩阵、协调度评价矩阵,以此来对执行机构方案的方案进行评价,以确定最优方案。论文结合粽子自动扎线机工艺动作时序优化为实例进行说明,最终结果表明该研究方法改善了粽子自动扎线机的设计过程,优化缩短了各执行机构的动作周期,提高了动作之间的协调度,从而提高了粽子的包扎效率。
[Abstract]:The timing optimization of mechanical motion behavior structure is the process of traditional process action timing relationship optimization, so it is an important method of mechanical product optimization design. Due to the lack of appropriate modeling and computer expression method. At present, the research of computer aided timing optimization at this level is still in its infancy. The sequential relation of process action, the method of generating the original behavior structure of automatic wire binding, and the expression algorithm of behavior structure based on overlay network are studied, and the original grouping rules of behavior are also studied. To optimize the behavior structure with the constraint of behavior timing, the main contents of the research are as follows: 1. Research on behavioral relationship timing optimization based on behavior primitive grouping. Make continuous relation rules between behaviors and construct mathematical model to realize behavior original grouping. In order to realize the original grouping result of all the technological actions, that is, the original behavior structure is obtained by means of computer aid, and the example of zongzi automatic wire binding machine is given. 2. The behavior structure representation based on the lap network is studied. The temporal relationship between the behaviors is expressed by the overlapped network graph, and the corresponding algorithm of the overlapped network expression is studied. 3. Timing optimization of behavior structure based on coordinated motion. The first motion relation and dependent motion relationship between behaviors are defined, and then time constraints are applied to the behavior of different groups. In order to realize the optimization of the behavior structure in the original behavior structure based on the original grouping result by adding the leading motion relation and the dependent motion relation, the paper also gives an example of zongzi automatic wire binding machine. 4. Analyze the behavior nodes, make the time parameters of each node, and construct the mathematical model of the conversion method which can get the initial mechanical motion cycle diagram by computer aided overlay network diagram. It also analyzes how to add motion properties to the initial motion cycle graph and how to combine the behavior expression to obtain the final motion cycle graph. 5. The main factors influencing the behavior structure are analyzed, such as the complexity of behavior relationship, the whole work cycle, the stability of the system, the number of behaviors contained in the behavior structure, and the evaluation degree of each influence factor. Then, the evaluation method of behavior structure is given. In addition, the feasibility evaluation matrix and coordination evaluation matrix are made to evaluate the scheme of executing agency to determine the optimal scheme. The paper combined with zongzi automatic wire binding machine process sequence optimization for an example to explain, the final results show that the research method improved the design process of zongzi automatic wire binding machine. The optimization shortens the action cycle of each executive body, improves the coordination degree between the movements, and thus improves the efficiency of zongzi bandaging.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH113.22

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