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The Bonding Strength Control Study of Electromagnetic Clutch

Author: DuYingHui
Tutor: LiShuiLiang
School: Henan University of Science and Technology
Course: Vehicle Engineering
Keywords: Electromagnetic clutch Drive circuit Bonding strength Fuzzy PID Control Simulation
CLC: U463.211
Type: Master's thesis
Year: 2010
Downloads: 85
Quote: 0
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Abstract


Currently, most of the vehicle's automatic transmission with electronically controlled hydraulic-mechanical automatic transmission. Its structure is complex and not flexible enough, and high manufacturing costs, control the frequency response characteristics is not good. For the status quo of China's automotive automatic transmission and simplify the structure and shift control mode by software, through the analysis of the research and development of domestic and foreign automatic transmission, combined with the actual situation, our group carried out electronically controlled electric executing agency automatically the development and study of the transmission. Electromagnetic clutch is a core part of the new automatic transmission, and its accurate control is the key to achieve the performance of a new automatic transmission, it directly affects the stability of the ride in the vehicle starting and running. In this paper, by analyzing the structural characteristics and its working principle of the automatic transmission of a new type of vehicle electronic control electrical implementing agencies to determine the function of the core components of the electromagnetic clutch and the control requirements of the electromagnetic clutch. MATLAB / Simulink environment to establish mechanical formula of the magnetic circuit of the electromagnetic clutch, electromagnetic force and the transmission torque and friction electromagnetic clutch torque characteristics, the electromagnetic force and transmission torque of the simulation model. Derived by simulation of the excitation current and the torque is transmitted in a certain range in a linear relationship. Components of the electromagnetic clutch control system designed according to the control requirements of the electromagnetic clutch is driven by the sensor, the electronic control unit and an electromagnetic clutch. There are more serious nonlinear and electromagnetic clutch drive circuit is difficult to obtain a precise mathematical model proposed the use of fuzzy adaptive PID control algorithm for closed-loop control of the system to ensure its normal work. Selected by the fuzzy variables, determine membership functions, control rules generation and fuzzy reasoning and fuzzy computing detailed analysis of fuzzy adaptive PID controller design excitation current regulation system. MATLAB / Simulink to build bonding strength electromagnetic clutch drive circuit PID control and fuzzy adaptive PID control simulation model, also established the the torque current dual closed-loop control simulation model. The simulation results show that the control system can achieve electromagnetic clutch combined with the speed control and the control of electromagnetic clutch when shifting the transmission torque capacity, bonding strength of the electromagnetic clutch control. And fuzzy adaptive PID controller is better than traditional PID controller dynamic response curve, small overshoot, short response time and high steady precision static and dynamic performance, in order to ensure stability, prolong clutch electromagnetic clutch life, to ensure the performance of the new type of automatic transmission.

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive structural components > Transmission > Mechanical transmission > Clutch
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