Study On Engine Performance Measurement And Control System

This paper is rooted in the sub-project of No 863 that of key technologies for motors' contamination purification and its industrialization (2002AA643010) : the setup of low-polluting motors' purifying conversion system and its matching designs. The main purpose is to set up the engine platform measure and control system is its aim.The theory of Fuzzy Control structures and principles of every part in the system the design of the Fuzzy Controller are to be introduced. The paper elaborates the circuit design including sensors, signal processing, data acquiring, PWM control and insulated driving, etc.It introduces the software on master PC. For insuring the reliability of the system, the reliability of the circuit and software are also discussed.The task of this paper includes dynamometer control, real time data display and the data communication between SCW and computer. In this paper, the dynamometer control becomes a part of system. It advances the automatization degree of test system , alleviates the work intension of lab assistant and improves the precision of test data.In automatic detecting test and control system, the computer exchange data with the controlling unit in order to realize the control by a better person-and- machine alterative approach of equipments. The serial communication is prevailing in application, as it is the main approach to exchange data between two equipments under the unified standards. This system consists of PC and the detecting settings cored by single unit controller, including main & accessorial SCW and A/D switcher, to attempt the communication between PC and SCW. PC can deal with the data carried by SCW the same time send the instruction to SCW through the condition decision. The data are likely to lose and error so as to it can no be checked and revised in physical layer due to the notorious using environment. According to this point some measures are adopted in data-chain layer and the commonest way is to adopt the protocol base on HDLC data-chain layer protocol.In this paper, the control of dynamometer, part of testplatform is accomplished and the driver of data collection card is designed. The data collection card is used to gather the rotate speed information. Two projects are compared in designing the driver. Better project is selected and accomplished. The data communication between SCM and computer is done. Due to the given condition, the protocol based on HDLC is designed. The protocol is realized by using the capability of VB language' s dealing with byte data. The way to use sensor of the system and the means to deal with sensor signal are set up. A set of hardware is designed. The real time control of dynamometer is accomplished by using fuzzy control tactic.