汽车专业外文文献翻译--适应性离合器在机械自动传动中的加工控制
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1、外文文献翻译 附录 A(英文原文) Adaptive Clutch Engaging Process Control Automatic Mechanical Transmission LIU Haiou(刘海鸥 ),CHEN HUIyan(陈慧岩 ),DING Huarong(丁华荣 ),HE Zhongbo(何忠波 ) Abstract: Based on detail analysis of cluch engaging process control targets and adaptive demands,a control strategy which is based on sp
2、eed signal,different from that of based on main clutch displacement signal,is put forward.It considers both jerk and slipping work which are the most commonly used quality evaluating indexes of vehicle starting phase.The adaptive control system and its reference model are discussed profoundly.Taking
3、 the adaptability to different starting gears and different road conditions as examples,some proving field test records are shown to illusrate the main clutch adaptive control strategy at starting phase.Proving field test gives acceptable results. Key words: automatic mechanical transmission(AMT); t
4、ransmission technology; adaptive control; main clutch engagement The engaging process control strategy of friction main clutch,whether wet or dry,is the focus in vehicle technology field.Some of the control strategies are based on main clutch displacement signal.An adaptive control strategy has been
5、 developed, which is based on main clutch out put shaft speed signal grounded on our research work.It is proved to have extensive adaptability. 1 Control Targets and Adaptive Demands The most commonly used quality evaluating indexes of vehicle starting phase are jerk and slipping work. JerkAs an ind
6、ex evaluating the smoothness in vehicle starting phase, the jerk is the rate of vehicle longitudinal acceleration.According to this definition,the expression of jerk is given as j=da/dt=d2v/dt2 (1) where j is the jerk;v and a are the vehicle running speed and acceleration respectively. According to
7、vehicle dynamics,the vehicle-run-ning speed is determined by the balance between engine traction force and running resistance and can be expressed as tvDeg gdGdvACfGTrii 20 15.21)s in( (2) Where eT is the engine out put torque;G is the vehicle total weight; r is the driving wheel radius; f and are t
8、he road resistance coefficient and ram p way angle respectively; DC is the air resistance coefficient. The function of a mechanism is to transform motion from one rigid body to another as part of the action of a machine,There are three types of common mechanical device that can be used as basic elem
9、ents of a mechanism. 1.Gear system,in which toothed members in contact transmit motion between rotating shafts. 2.Cam system,where a uniform motion of an input member I converted into a nonunifirm motion of the output member. 3.Plane and spatial linkages are also useful in creating mechanical motion
10、s for a point or rigid body. Mechanisms form thee basic geometrical element of many mechanical devices including automatic machinery,typewriters,mechanical toys,textile machinery,and others.A mechanism typically is designed to create a desired motion of a rigid body relative to a reference member.Ki
11、nematic design,or kinematic syntheses,of mechanisms often is the first step in the design of a complete machine.When forces are considered,the additional problems of dynamics,bearing loads,stresses,lubrication,and the like are introduced,aad the larger problem become one of machine design. Gear are
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