nhiều quan điểm orthographic của thiết kế, nghiên cứu chuyển động của nó bằng cách vẽ vòng cung, cho thấy nhiều vị trí, và sử dụng lớp phủ trong suốt, di chuyển. Soạn thảo hỗ trợ máy tính (CAD) hệ thống có thể tăng tốc quá trình này ở một mức độ nào đó, nhưng có thể bạn sẽ tìm thấy rằng cách nhanh nhất để có được một cảm giác về chất lượng của thiết kế liên kết của bạn . | GRAPHICAL LINKAGE SYNTHESIS 77 multiple orthographic views of the design and investigate its motions by drawing arcs showing multiple positions and using transparent movable overlays. Computer-aided drafting CAD systems can speed this process to some degree but you will probably find that the quickest way to get a sense of the quality of your linkage design is to model it to scale in cardboard or drafting Mylar and see the motions directly. Other tools are available in the form of computer programs such as FOURBARFIVE-BAR SIXBAR SLIDER DYNACAM ENGINE and MATRIX all included with this text some of which do synthesis but these are mainly analysis tools. They can analyze a trial mechanism solution so rapidly that their dynamic graphical output gives almost instantaneous visual feedback on the quality of the design. Commercially available programs such as Working Model also allow rapid analysis of a proposed mechanical design. The process then becomes one of qualitative design by successive analysis which is really an iteration between synthesis and analysis. Very many trial solutions can be examined in a short time using these Computer-aided engineering CAE tools. We will develop the mathematical solutions used in these programs in subsequent chapters in order to provide the proper foundation for understanding their operation. But if you want to try these programs to reinforce some of the concepts in these early chapters you may do so. Appendix A is a manual for the use of these programs and it can be read at any time. Reference will be made to program features which are germane to topics in each chapter as they are introduced. Data files for input to these computer programs are also provided on disk for example problems and figures in these chapters. The data file names are noted near the figure or example. The student is encouraged to input these sample files to the programs in order to observe more dynamic examples than the printed page can provide. These examples
