Anti-Slip Control Method Of Special Bridge Crane For Zinc Electrolysis And Its Application

The special bridge crane for zinc electrolysis is the key handing equipment in the electrolysis workshop,which is used to transfer anode and cathode plates.In the actual production,due to the severe acid fog and the large humidity changes,the rail adhesion coefficient varies in a wide range,and the crane is prone to slipping,causing wear between the wheel and the rail,and affecting the working efficiency and safety of the crane.Therefore,based on the establishment of the anti-slip system model of bridge crane,the fuzzy PID anti-slip control strategy combined with immune feedback is proposed,the monitoring and management system is developed.The main research work and innovative results are shown as follows:(1)In view of the characteristics of nonlinear,strong coupling of bridge crane for zinc electrolysis,the anti-slip dynamic system model of crane is established on the basis of reasonable simplification.Among them,the reasons for the crane’s slippage and the adhesion characteristics between the wheel and the rail are analyzed in detail,and the main factors affecting the adhesion and the anti-slip criterion are discussed in depth.Base on this,the model of crane dynamic system is established by fully considering the adhesion relationship and the constraints of the swing angle.(2)A crane anti-slip control strategy combining immune feedback and fuzzy PID is proposed.In view of the complex disturbance and time-varying parameters in the operation process,combined with the immune feedback mechanism and fuzzy reasoning,the proportional coefficient is adjusted online according to the control quantity and its variable rate.According to the error and the error rate of change,the integral and differential coefficients are adjusted by fuzzy self-adaptation.At the same time,in order to further improve the adaptive ability of the system,the state transition algorithm is used to optimize the key parameters in the immune feedback.The effective combination of immune feedback and fuzzy PID can quickly adjust the speed and slip rate of the crane online,and realize the tracking and anti-slip control of the expected slip rate between the wheel and the rail.The simulation experiments verify the effectiveness of the proposed control strategy.(3)The monitoring and management system of bridge crane was designed and developed.Closely combined the site requirements,the overall system architecture was put forward,and the design and function realization of hardware configuration,system communication and network,HMI system and monitoring system were completed.Further,the system was put into field application and debugging,and the positioning accuracy and control effect met the site requirements,the expected effect was achieved,which improved the working efficiency of bridge crane and the intelligence level of electrolysis workshop.