| In this paper, the digital controller applied to the traveling system of the paving machine is researched. The transmission method and control theory of the hydraulic traveling system of the paving machine are described in detail in the paper. The paper puts out a specific control strategy to control the machine's running forwards and backwards, starting, braking, accelerating and decelerating, and or so, turning right and left and steering, at the same time, puts great emphasis on the study of constant-velocity technology and integrates the PID theory and fuzzy control theory into the design of the digital controller. The paper accomplishes the software and hardware design of the control system utilizing microcomputer , sets up the complete mathematical model of dynamic characteristics for whole drive system, and carries out the simulation and analysis of dynamic characteristics through the simulating model set up by MATLAB software. The simulation result is about the output-velocity characteristic of the motor proving that fuzzy-adjustable-PID control strategy is superior to traditional PID control strategy and the validity of the digital controller's calculation. The function and property of the controller is verified by experiment. |
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