| Magnesium vapor generation device is a device that converts magnesium source into magnesium vapor at high temperature and then enters the molten iron furnace through injection to complete desulfurization and refining.The magnesium vapor generation device needs to be installed on the moving platform to complete the smooth and rapid lifting,translation and rotation,so as to realize the mixing,heating,reaction preparation,desulfurization and refining of raw materials.Because the hydraulic control system has the characteristics of high power density,fast response speed and high control accuracy,the motion platform is driven by the hydraulic control system.In particular,the platform adopts hydraulic position servo control to realize the requirements of high-precision position control.Firstly,the structural characteristics of the motion platform of magnesium vapor generation device are analyzed,and the mechanical system and hydraulic control system of the motion platform are designed.The static analysis and fatigue analysis of the mechanical structure of the motion platform are carried out to verify the rationality of the structural design of the motion platform of the magnesium vapor generation device,and provide technical support for the bearing weight of the device,convenient maintenance and avoiding fatigue damage.Secondly,the hydraulic control system of the motion platform of magnesium vapor generation device is designed.The swing motor is used to complete the rotary motion of the platform.The lifting movement mainly plays a bearing role,and sets functions such as hovering at any position and pressure balance.The hydraulic servo valve controlled cylinder system is adopted in the translational motion to realize precise position control.Then,the electro-hydraulic position servo control system of translational motion is deeply analyzed theoretically,the mathematical model of the valve controlled asymmetric cylinder system is established,the mathematical model of each component link is constructed,the transfer function of the hydraulic servo position control system is derived and reasonably simplified,and the dynamic characteristics of the control system in frequency domain and time domain are simulated,and the steady-state error and dynamic stiffness are analyzed.It lays a theoretical foundation for optimizing the structural parameters of the hydraulic control system and improving the control performance Finally,in order to improve the control performance of hydraulic control system,PID controller is designed and neural network control algorithm is added.Through simulation research and comparative analysis,PID control can improve the control effect of the system,but because PID control cannot adjust parameters in real time and cannot adapt to the nonlinear function of the system,the addition of neural network algorithm effectively solves the key technical problems such as parameter tuning,and achieves good control effect,meeting the performance requirements of device translation.The movement platform of the hydraulic driven magnesium vapor generation device designed by the author runs smoothly,effectively improving the efficiency of magnesium vapor generation and the safety and reliability of equipment operation. |
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