Study On The Propulsion And Turning Control Of Rotary Drill Based On Fuzzy PID

The performance of rig is mainly determined by its drilling control system, however, throttle velocity governing mode is adopted by most of domestic rig, resulting in low energy efficiency and poor control effect of drilling. This paper designed a hydraulic volumetric speed control system to adjust the pressure or flow rate through regulating the displacement of variable pump, to adapt to load change while drilling. With cmplex geological structure. Traditional control method is to feedback the pressure directly. Rig poor working conditions, conventional pressure direct feedback control, poor working conditions when dealing with complex drilling performance results, the use of electro-hydraulic proportional control mode, convert it into a pressure- electric feedback for pressure, velocity, displacement, adjustment and compensation torque and other parameters to ensure efficient operation at the same time, make the drilling process more stable and reliable.This paper analyzes the working principle of hydraulic components, hydraulic transfer function model was established for discrete components, and uses MATLAB / simulink to simulate the hydraulic drilling system as a whole, to analyze and optimize the parameters; besides, modeling the entire hydraulic circuit with AMESim which is a professional computer-aided analysis platform for hydraumatic. Then, use these two models to verify the correctness and accuracy of each other. The physical type of modeling has obvious advantages in intuitive and accuracy. Therefore we use the later focuses on the way the system characteristics were analyzed using conventional PID controller to shorter the dynamic response time, and reduce the maximum overshoot, settling time and other parameters optimized to improve the drilling efficiency of the hydraulic system.The structure of traditional PID controller is simple, robust, but when the plant is running, all parameters of the controller is fixed, in dealing with complex conditions, the parameters aren’t fit in the plant. Therefore, this article designed an adaptive fuzzy PID controller to deal with the question, which is able to adjust the related parameters online, and with the hydraulic control system co-simulation of AMESim/Simiulink, the final results obtained online has metted the requirements, enhanced the performance of drilling control system.