管内智能封堵器气动减振控制系统设计

Design of Pneumatic Vibration Reduction Control System for In-pipe Intelligent Plugging Device

为减少管内智能封堵器的振动,在封堵器尾部设计三块可折叠扰流板,以降低管内流场的压力和涡量,从而减少流体对封堵器的冲击,但扰流板的角度对减振效果有着较大的影响,因此需要对扰流板的运动进行控制,使其翻转到指定的角度,达到最佳的减振效果。设计一种气动控制系统,建立气动控制系统的模型,选择模糊PID控制方法来控制系统的位移,进而控制扰流板的翻转角度。同时对系统的运动速度进行控制,间接调节扰流板的翻转角速度,使扰流板的翻转速度趋于稳定,避免由于速度波动而引起流场剧烈变化。仿真结果表明:所设计的控制器可以有效地控制扰流板翻转角度和角速度,满足实际工程需要。

In order to reduce the vibration of the in-pipe intelligent plugging device,three foldable spoilers were designed at the end of the plugging device to reduce the pressure and vorticity of the flow field in the pipe,so as to reduce the impact of the fluid on the plugging device.However,the angles of the spoilers had a great influence on the vibration reduction effect,so the motion of the spoilers needed to be controlled so that it flipped to a specified angle to achieve the best vibration damping effect.A pneumatic control system was designed,its model was established,and the fuzzy PID control method was selected to control the displacement of the system,and then the flipping angles of the spoilers were controlled.At the same time,the motion speed of the system was controlled,and the turning angular velocity of the spoilers were adjusted indirectly,so that the turning speed of the spoilers tended to be stable,and the change of the flow field due to the speed fluctuation was avoided.The simulation results show that the designed controller can be used to effectively control the spoiler flipping angles and angular velocity.It meets the actual engineering needs.