Dissertation > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system > Fuzzy control, fuzzy control system

The Study of Intelligent Windscreen Wiper System of Automobile Based on Fuzzy Control

Author ZhaoYan
Tutor WangHaLi
School Harbin University of Science and Technology
Course Theory and New
Keywords Automobile wiper Raindrop sensor Fuzzy Control PIC microcontroller
CLC TP273.4
Type Master's thesis
Year 2007
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The wiper is one of the important parts of the automobile body . The car smart wiper system is gradually replacing the traditional mechanical structure of the wiper . Intelligent rain sensing wiper control system allows the driver to exempt the trouble of manually operated wiper , to improve the safety of the driving rain . The raindrops sensor is an important part of the automobile intelligent wiper system . This article analyzes the composition of the principle of the three raindrop sensor developed a new car infrared raindrop sensor , based on the principle of light intensity change . The sensor uses the infrared emission tube and the infrared receiver tube, the composition of the infrared light emitting circuit and the infrared light receiving circuit , and with a microcontroller processing received signals produced by Siemens . Raindrop sensor is mounted on the side of the windscreen of the cab , and when it rains, the raindrop sensor can distinguish rain or drizzle . The experiments show that the raindrop sensor responsive , real-time , stable performance . Many nonlinear factors will affect the synchronization wiper in automotive smart wiper system , . In this paper, based on the fuzzy control theory and wiper synchronization swing rules proposed an intelligent wiper system based on fuzzy control of the car . PIC microcontroller to control the entire system , the wiper is to control two wiper blades , wiper motor has two high-speed and low-speed stall infrared raindrop sensor signal detected when the PIC16F873 the RA0 port that raindrops falls on the windshield , wiper blades swing around when light rain , the wipers work in low gear , heavy rain , wiper work in high gear . Two wiper motor speed can not be exactly the same due to the problem of the production process , there will be two wiper swing out of sync . So , we need knowledge of human experience , the fuzzy control rules , to adjust the duty cycle of the PWM signal , the two wiper synchronization swing . Hardware block diagram and the main program flow chart is given . In this paper, MATLAB software simulation system of fuzzy control and PID control system , and compare the two simulation results . It can be seen that the fuzzy controller has speed adjustment , small overshoot , control and high precision .

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