1、汽车离合器CAD系统的研究与设计外文文献翻译中英文翻译外文翻译外文资料翻译The research and design using CAD system for the clutch of automobileClutch is used to transfer and switch of the powers which are coming from the engine. In automobile, clutch is connected with engine and derailleur. It can shut of and stably transfer the power
2、between them. How to reasonably, effectively and speedily design clutch always is the pursuing destination of all clutch factories. The appearance of CAD which is the abbreviation of computer aided design make it possible. Automobile CAD is the forerunner of CAD all the times. CAD is fist used in au
3、tomotive industry and become more and more indivisible with CAM, CAE and CAP furthermore, integration is becoming to reality. Researching how to use computer to aid us design the automobile clutch and how to develop a useful and advanced automobile clutch computer aided design system-abbreviation is
4、 ACCAD that can make a steady system framework for automobile cultch integrated design and manufacture system. are the destination of this thesis. ACCAD system should firstly be able to aid engineer design clutch, secondly to aid engineer analyze the designed clutch, finally to organize and manage t
5、he data of design. From the long-term consideration it should also be able to aid workshop manufacture clutch and help manager supervise all the life cycle of clutch. So it should have a core which can integrate all these subsystem. Engineering database (EDB) is just for this use and Using EDB to co
6、nstruct CIMS become an inevitable current. In order to expand ACCAD and realize clutch CIMS in the future ACCAD system also need EDB as the core to integrate each design and management subsystem into a whole system. At the third chapter of this thesis the technology of EDB and how to design automobi
7、le clutch EDB are researched and automobile clutch EDB is set up according to the framework of entire database, project database and design database. The traditional procedures of the design of automobile clutch are: selecting storing confident, designing clutch structure type, friction flat, clutch
8、 sketch, assembled module and each part of clutch. In our country, all these procedure are handmade, but in the coming years with the application of computer aided drawing software such as Auto CAD of Auto Desk corp. engineering drawing can basically be done by computer. But the depicting capability
9、 of this two-dimension engineering drawing module is so deficient that it can only be used as drawings and cant be used to analyze by computer. Along with the appearance of B-P modeling and curve-based or solid-based modeling, mechanic parts are denoted by three-dimension module which can better aid
10、 engineer design and analyze them. But this module loses parts of the whole information of them, so it results in much difficulty to integrate aided design subsystem, aided manufacture subsystem and computer analyzing subsystem. Feature-based modeling can just make up this shortcoming, and also if i
11、t combines with parameter design technology it can enhance the capability not only of depicting but also of fast amending. At the forth chapter of this thesis the technology of feature-based is researched and the parametric feature-based solid models are created upon MDT that is belonging to Auto De
12、sk corporation. In order to aided engineers to design clutch faster computer is used to simulate engineers to use variant design technology to design clutch products that are based on original models. Variant design technology has some intelligence. Intelligent CAD is a direction of developing CAD.
13、At the fifth chapter of this thesis the technology of variant design is researched and variant design of automobile clutch is achieved on MDT by the technology of parameter table-driven and feature restrained Besides some degree of integrity and intelligence ACCAD system should have some degree of a
14、utomation, that is to say that ACCAD can automatically design clutch according to primitive design requests, analyze, check and optimize some basic parameters of clutch. At the sixth chapter of this thesis the combining model of clutch is analyzed, some formulas of designing and calculating basic pa
15、rameter are deduced, the working instances of diaphragm spring are analyzed and the characters of load-distortion and stress-strain are calculated simulatively by the formulas of A-L which are approbatory internationally nowadays. The optimizations of some basic parameters and diaphragm spring are c
16、arried out by muti-body arithmetic in which design destinations, design restrictions and the primitive value of design variables can be changed according to real demands. Instances deduction and design templates are used to design the model of each part of clutch and all these models are assembled a
17、utomatically after that basic parameters and structure type are completed according to primitive design demands. The design templates are deduced in existing design instance of clutch product by inter gent instance-deducing technology. Then designers can mend and to-and-fro design them till they can
18、 meet the design demands. So computer aided function and mans initiative can be fully enlarged, automatic design and mutual design are combined indeed .It needs not only much knowledge of automobile clutch design and CAD but also much high lever of software design and computer application to really
19、realize such a complicate and advanced ACCAD system. So I also researched the method of object-oriented and the operation system of Windows and study many sorts of program design language. The theory of software engineering is used to analyze ACCAD system in requirement, function structure, flow cha
20、rt, project design and module design. The software developing tools of Visual Basic and Visual C+ are used to design and implement the ACCAD system. Yi-Dong clutch corporation have applied it to design clutch. Practice proves that the ACCAD system can aid designers to design clutch well, remarkably
21、improve the ability of clutch product design, greatly shorten the design cycle and also it has very high stability and extensibility.INVESTIGATION TO DYNAMICS AND CONTROL OF VEHiCLE AMT CLUTCHES DURiNG ENGAGEMENTChina Automotive Parts enterprises face more and more pressure and challenge with China
22、joining WTO.The global Automotive and Parts MNC are gradually entering the lastly and largest potential market of the world.The local automotive industry especially parts is not so good as MNC no matter in scale, capital capacity, products technical level and marketing level.So in order the to exist
23、,the local automotive parts enterprises must improve themselves as quickly as possible in some the fields. One of the important reasons for this risk is the slow Product Engineering with low technical content.It is caused by several reasons that are outdated engineering method，insufficient working e
24、xperiences，low quality of the working people and the outdated methodology of product Engineering，and the last one is the most important reason.In comparison with hydraulic Automatic Transmission (AT) and Continuously Variable Transmission (CVT), Automatic Mechanical Transmission (AMT) has advantages
25、 of much lower cost in manufacturing and easier installation in driveline system .This means that there exists a vast potential market for development of such a mechanical technology. As an important functional module in AMT vehicles, however, the automatic clutches developed by far still have some
26、shortcomings, for example, of road startup failure, considerable shock, unstable shifting, friction-caused service life reduction, and time-delay response. The key concern is therefore concentrated in this dissertation on real implementation of optimal transient responses and control laws during eng
27、agement of the clutches, and detailed investigations are made both in theory and experiment. Strong nonlinearities exist in such component systems as engine, clutch membrane spring and servo actuator and consequently difficulties are encountered in design of the optimal control for improving transie
28、nt responses of the automatic clutch. A system synthesis is proposed herein for the study of nonlinear dynamics and control of AMT automatic clutches. Based on principles of automotive powertrain systems, the main system under consideration can be decomposed into two sub-systems, engine and transmis
29、sion systems. The Popov super stability theory has adopted for the first time in association with reference, model following adaptive control for the engine. monitoring. The engine monitor requires accurate predictions of rational velocities. A prediction model is constructed on the basis of flat ne
30、ural network A fast recursive algorithm is used to improve the learning speed by forgetting factor. Accordingly, the present neural network algorithm leads to considerable reduction of effort in network weighting matrix as well as increase of self-learning and adaptability of neural network algorith
31、ms to nonlinear and nonstationary systems. It has been shown by comparison of the numerical results with experiments that the modified algorithm is proved to be reliable and effective in the engine condition monitoring. In modeling the system, the load-deflection relationship of the clutch membrane
32、spring is generally treated as a black box, and as a result many advanced control methods can not be applied. A new approach for the black box is required nevertheless in development of the accurate model. The nonlinear relationship is mathematically derived out for the clutch system during engageme
33、nt and a further progress is thus made to certain extent for the Almen-Lazslo method. By matching control inputs of the two subsystems, a synthetically optimal performance of the system can be achieved. It can be seen that by the system synthesis, not only the design of a feedback controller is accommodated according to longitudinal dynamic requirements of the wh
