Research And Development Of Automatic Water Supply System For Passenger Trains

With the development of railway construction,"efficient,fast and safe" has become the inevitable trend of current railway development.In order to improve the degree of automation of passenger train watering operations,combining the automatic watering requirements with railway technical specifications,an automatic watering system for passenger trains was developed.The main research contents include:(1)Based on the automatic water supply requirements and current railway technical specifications,determine the overall scheme of the automatic water supply system,plan the water supply operation process,and clarify the technical requirements.On this basis,the overall structure of the automatic water supply system is designed,a three-dimensional model of the mechanical structure is established,and hardware such as sensors and motors are selected.(2)Combining the overall plan,establish a mechatronics simulation model of the automatic water supply system,and conduct mechatronics simulation.In order to improve the control accuracy of the identification system,the PID control algorithm is used to carry out closed-loop feedback control of the drive motor speed,compare and analyze the control effects of different PID parameters,determine the appropriate parameters,and realize the uniform speed regulation of the motor speed.The results show that the structure of the automatic water supply system is reasonable,the expected function can be realized through the electromechanical integration simulation,and the PID control speed can achieve the ideal control effect.(3)In order to explore the structural stability of the automatic filling system,establish an overall anti-overturning model,and analyze the anti-overturning ability of the system under dangerous conditions.On the basis of overall stability,the strength of the key load-bearing components of the system is checked to analyze whether its load-bearing capacity can meet the requirements of use.The analysis results show that the system has good anti-overturning ability,and the key load-bearing components have reliable strength and can meet the requirements of use.(4)Using multi-body dynamics software to analyze the peak load of the lifting rod during the movement of the system,the results show that the peak load of the lifting rod during the movement is less than the allowable stress of the material,and the strength of the lifting rod is reliable.On this basis,the impact of vibration on the recognition system is explored when the system is in motion.The results show that the recognition system vibrates more obviously in the start-up phase,and gradually stabilizes after 3 s.The recognition system can meet the requirements of use when the vibration amplitude is the largest.(5)Trial-produce the prototype of the automatic water supply system and conduct basic functional tests.Experiments show that the automatic water supply system runs smoothly and can realize the functions of automatic recognition of the water injection port,automatic docking,automatic control of water supply,automatic stop of water supply,and automatic emptying of residual water.