陳達仁臺灣大學：機械工程學研究所白維銘Pai, Wei-MingWei-MingPai2007-11-282018-06-282007-11-282018-06-282004http://ntur.lib.ntu.edu.tw//handle/246246/61236A systematic and efficient methodology for conceptual design of mechanisms is developed based on the classification of design specifications. In this work, design specifications for a mechanism are recast into three more coherent categories: functional requirements, structural requirements and design constraints. Based on functional requirements, the functioning kinematic chain of the mechanism is constructed by the functioning links such as the ground, input and output links, etc. According to structural requirements, kinematic structures are searched from the existing atlas of kinematic structures. Then, the functioning kinematic chain is compared with segments of the kinematic structures searched to obtain a much smaller number of compatible kinematic structures, where development of conceptual design of mechanisms can be efficiently accomplished. Lastly, joints of the compatible kinematic structures are labeled subject to design constraints, such that feasible mechanisms are yielded. With this methodology, design specifications with different natures can be used to guide a designer through various stages of the conceptual design process in a systematic manner. The creation of the variable-stroke engine mechanism is used as an illustrative example. Two design examples, the creation of the latch and retainer mechanisms for wafer containers are presented to demonstrate the proposed methodology. It is believed that the proposed methodology and design examples are beneficial to the conceptual design of mechanisms.Chapter 1 Introduction 1 1.1 Background 1 1.2 Overview of related works 3 1.2.1 Graph representations 3 1.2.2 Conceptual designs of mechanisms 5 1.3 Motivation and preview 13 Chapter 2 Design Methodology 17 2.1 Introduction 17 2.2 Classification of design specifications 18 2.2.1 Embodiment of functional requirements 19 2.2.2 Coordination of structural requirements and design constraints 22 2.3 Construction of functioning kinematic chain(s) 26 2.4 Search of kinematic structures 29 2.5 Identification of compatible kinematic structures 31 2.6 Enumeration of feasible mechanisms 35 2.7 Summary 39 Chapter 3 Latch Mechanism Design for Wafer Containers 40 3.1 Introduction 40 3.1.1 Standard mechanical interface (SMIF) technology 40 3.1.2 Latch mechanism design for wafer containers 44 3.2 Classification of design specifications for the latch mechanism 48 3.2.1 Embodiment of functional requirements 49 3.2.2 Coordination of structural requirements and design constraints 51 3.3 Construction of functioning kinematic chains 53 3.4 Search of kinematic structures 54 3.5 Identification of compatible kinematic structures 56 3.6 Labeling of joints in compatible kinematic structures 59 3.7 Discussion and summary 65 Chapter 4 Retainer Mechanism Design for Wafer Containers 66 4.1 Introduction 66 4.2 Classification of design specifications for the retainer mechanism 70 4.2.1 Embodiment of functional requirements 71 4.2.2 Coordination of structural requirements and design constraints 72 4.3 Construction of functioning kinematic chain 73 4.4 Search of kinematic structures 74 4.5 Identification of compatible kinematic structures 76 4.6 Labeling of joints in compatible kinematic structures 77 4.7 Discussion and summary 81 Chapter 5 Epilogue 82 References 84 Appendix Detailed Design of Latch Mechanism KC2-1 90 A.1 Introduction 90 A.2 Mechanism description 93 A.3 First stage: optimization of link dimensions 94 A.3.1 Derivation of output slot-cam profile 94 A.3.2 Optimization of link dimensions 96 A.3.3 A numerical example 102 A.4 Second stage: derivation of input slot-cam profile 103 A.5 Computer simulations 107 A.6 Summary 11028576585 bytesapplication/pdfen-US機構概念設計Mechanismonceptual Designthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/61236/1/ntu-93-F88522603-1.pdf