【作者】 王志斌；

【导师】 刘检华；

【作者基本信息】 北京理工大学 ， 机械工程， 2014， 硕士

【摘要】 线缆是复杂产品机电系统中连接电气元器件、电气设备或控制装置的电线线束的总称。线缆在产品电气系统中起到控制动力传输的作用，因而其连接的可靠性将直接影响产品的性能和可靠性。目前，线缆的数字化布局设计及敷设仿真方法主要从几何特性出发，很少关注线缆本身的物理属性例如重力、弯曲特性造成的柔性线缆变形姿态，影响了线缆数字化布局结果的真实性和取样长度的准确性。本文研究建立了线缆的物理特性模型，并对虚拟环境下基于物理特性的线缆的布局设计和装配仿真技术进行了研究，通过在线缆布局设计与装配仿真中系统地考虑线缆的物理特性，使线缆布局结果和敷设仿真的形态更具真实性，其数字取样长度更加准确。论文的主要研究工作概括如下：(1)分析了线缆在复杂机电产品中的广泛应用与重要作用以及存在的问题，总结出由于落后的布局设计方法以及装配工艺规划方法导致了这些问题。同时指出根据线缆物理属性进行布局设计和装配仿真的必要性，对国内外相关领域的研究现状进行了综述，并阐述了研究的背景和意义。(2)指出得到虚拟环境中的较真实的线缆形态，必须建立基于线缆物理属性的物性模型。提出了两种线缆物性模型，分别用于线缆的布局设计和线缆装配仿真。分别介绍了能量曲线模型和多分支弹簧质点模型的建立过程，并分析了这两个模型的适用领域以及约束添加方法。(3)介绍了基于物理属性的线缆布局设计流程，重点讲述了能量曲线模型所包含的线缆物理属性，并对模型进行求解，最后根据线缆特点对该模型进行约束添加，使其形态更加符合线缆特点。(4)提出一种多分支弹簧质点模型作为线缆的物性模型实现线缆的装配仿真，解释了该模型中各线缆物理属性的含义，重点阐述了该模型的求解策略和方法以实现虚拟环境中的实时性要求；最后对模型进行约束的添加以符合线缆运动时特点，同时构造线缆的碰撞检测模型，实现了虚拟环境中线缆实时碰撞检测。(5)在本文所述研究内容的基础上，设计并开发了相关的原型系统，介绍了该系统的开发概况、开发背景、体系结构、功能模块、接口规范、实现方法和运行实例，并结合实例对提出的方法和技术进行了验证。最后，对全文进行总结，并对相关研究工作的后续发展进行了展望。更多还原

【Abstract】 Cables are widely used in complex products to connect electrical components andcontrol devices. Because cables are responsible for the power transmission in complexproducts, cables play an important role in quality of products. Nowadays, the layout designand assembly process planning of cables require more depends on physical prototype andexperiences of workers. So it has a long design cycle but poor quality and stability.Modeling cables oriented physical character and simulating the process planning of cablesin virtual environment is an effective way to solve these problems. Based on these, amethod of layout design and assembly process planning of cables is proposed, and theprototype system is developed in this thesis to provide an effective way for productsdevelopment.The studies of this dissertation focus on following aspects:(1) It pointed out that cables components were widely used in mechanical andelectrical products. At the same time, there exist lots of problems about the quality ofcables. It also pointed out that it is necessary to build up the cable’s model orientedphysical properties for layout design and assembly simulation of cables. At last, this paperintroduces the research background and significance of this study at home and aboard in thefield.(2) To get the form of a real cable in virtual environment, a physical model of cablesshould be built up based on the physical properties. Two physical models are put forwardfor layout design and assembly simulation of cables. Then, the energy curve model andmulti-branch mass-spring model are built up. At last the application field of these twomodels is introduced and the constraints are added to the method.(3) First of all, the design process based on the physical properties of the cable layoutis introduced. The method focuses on the physical properties of the cable contained in theenergy curve model, and the solution about this model. At last, the constraints are added inthis model according to the characteristics of cables to form more in line with cablefeatures.(4) A multi-branch mass-spring model, with lots of cable’s properties, is proposed as a physical model to realize the assembly simulation of cables. The most important partfocuses on the strategies and methods of solving the model in order to realize the real-timerequirements in a virtual environment. Finally the constraints are added to the model, andthe collision detection model of cables is constructed to realize the request of cablecollision detection in virtual environment.(5) On the basis of the research content, related prototype system is designed anddeveloped. This paper introduces the general situation, system structure and functionmodule in this system, at last, the instance of the system is verified with an example.Finally, the summing-up of the whole dissertation is made, prediction of the futureresearch and direction of relative techniques are made.更多还原