The Key Control Technology Research Of AMT/DCT Automatic Transmissions Universal Development Platform

In order to construct a universal development platform of AMT/DCT transmission exploitation, reduce the research and empolder period, and saving empolder spending, the key technology of AMT/DCT automatic transmission universal development is researched.The thesis start with several key issues about the development of AMT/DCT automatic transmission control system of universal development platform, researched the common problem of AMT/DCT automatic transmission, had the integrated control system of development platform acieve generalization or part generalization. The thesises have researched following aspects.(1) The start-up clutch control is one of the key problems of AMT/DCT automatic transmissions develop. The optimal control of start-up clutch slip is researched, dynamic model of start-up clutch of AMT vehicle is set up, and realize pressure of clutch optimal; Optimal control of one clutch slip start-up of DCT is researched, it's dynamic model is similarity to AMT strat-up clutch, used optimal press control of driven plate of clutch, realized optimal slip control of start-up clutch; reaserched the main and auxiliary clutch optimal slip start-up control of DCT, the dynamic model of two clutch start-up is established, optimal slip control realized by use optimal press control; based on these research, universal control of several start-up clutch is researched, the universal dynamic model of start-up clutch control system is established, the particularity of different start-up clutch is analysised, distiniguish these different by software control method, at last, start-up clutch universal control of uniform optimal control is realized. A uniform method of optimal control are used for different types of starting clutch slip control, universal starting clutches control are achieved through the modular method.(2) The clutch of shift control, wich is an other key problems of automatic transmissions develop. The questions of AMT vehicle clutch shift gear control is studied, the dynamic model of clutch system been set up, in the conditions of shock intensities meet driver comfort, have slip work least, Realize optimal press control of clutch starting with optimal control method. the shift clutches of DCT is also researched based on Optimal control, slip control dynamic function of shift clutch of DCT is set up, realized the gear shift clutch control used optimal press control. Based on the front research of two types shift gear clutch control, analysed the characteristic of the two clutch control, identification the type of clutch through software, then specifical problem of different type clutch is process individually, A uniform method of optimal control are used for different types of shifting clutch slip control, universal shifting clutches control are achieved through the modular method.(3) Gear shift strategies of step speed automatic transmission is also one of the key problems, fuzzy control method shift strategy, neural networks control method shift strategy and dynamic fuzzy neural networks control method shift strategy have respectively researched in gear shift, to step speed automatic transmissions, the dynamic fuzzy neural networks control method have generality.(4) In order to improve the overall performance of automotive powertrain, engine and transmission must implement a comperehensive control. Modeling based on neural networks is researched to avoid the difficult of engine model, improve the accuracy of the engine model. Take into account the problem of dynamic response delay, predictive control method is uaed to adjust the throttle in advance, meet the dynamical need of powertrain in real time.