Study On Optimal Design Method Of Human-Machine Interface In Mechanical System

A problem which can be not avoided to every human-machine system designer is that they haveto evaluate and optimize the reasonableness of the geometrical position matching relationship forHuman-Machine Interface (HMI) in a mechanical system. Since the beginning of this century, thisproblem never be solved completely yet for so many years. But follow by the progress oftechnology and the basic ergonomic research works, especially the theory of computer softwaredevelopment, this paper is advanced a new solution for this problem. In this paper, on the basis ofevaluation, the degree of matching is applied as objective function, and the optimal design ofhuman-machine interface in mechanical system is realized.Object-orientation is a new technology based on objects and classes. Objects provide acanonical focus throughout analysis, design, and implementation by emphasizing the state,behavior, and interaction of objects in its models, providing the desirable property of seaxnlessnessbetween activities. A class is a general term denoting classification, which provides a specificationof structure, behavior, and inheritance for objects. Object-orientation is presently treated as thebest methodological framework for software engineering, and is becoming the preferred choice formodem computer programming projects. Object-orientation is put into the area of optimal designof human-machine interface in mechanical system in this thesis, and a set of independentcomponent objects was brought forward as a result, which established the main frame of theoptimal design of human-machine interface in mechanical system software.Since the structure of a general human-machine interface of mechanical system, which is dealtwith in the optimal design of human-machine interface in mechanical system software, is verycomplex and flexible, it is a key problem that how to describe a human-machine interface incomputer. Data structure is the study of methods of representing objects, the design of algorithmsto manipulate the representations, the proper encapsulation of objects in a reusable form, and theevaluation of the cost of the implement. Consequently, a set of data structures based on chainedlist was brought forward and implemented with template classes in C++ language to successfullystore any complex human-machine interface model in mechanical system.The virtual construction method of human-machine interface in mechanical system is studiedand presented, and the virtual construction of human-machine interface is realized in computer.Here, the construction method of the 3-dimension human model and the database of Chineseadults' human dimension is introduced in detail. The object-oriented modeling method is appliedto construct the human model. It takes the limb as the basic part of body, also as an object. And,the dimension of human model is referenced from the China National Standard GB 10000-88`Human Dimensions of Chinese Adults'.The optimal design method of human-machine interface in mechanical system is presented.This method applies the degree of matching as objective function, the geometrical position area ofthe parts in human-machine interface as restrain qualification, and the multi-objectiveoptimization method with the descendent arithmetic as optimization method. As a result, theoptimal design of human-machine interface in mechanical system is processed.The structure and characteristic of the software system with human-machine -interface inII:7,mechanical system are discussed. In order to evaluate and optimize the general human-machineinterface in mechanical system, a software system, named Human-Machine Interface OptimalDesign (HMIOD) , is implemented with Microsoft Visual C++ language and OpenGL on MS-Windows NT. HMIOD can construct mechanical system model and adjust the mode...