基于分布式升降梯的塔型自动化停车系统取车流程与构型改善

ower automatic parking system based on distributed lifts is a kind of high density three-dimensional parking system with cylindrical body. There is room for improvement in the operation and selection of lift in the system retrieve process. The retrieve command is sended synchronously to the storage layer and the lift, allowing the lift to rise from the storage layer to the storage layer before the vehicle completes the retrieve movement to improve the retrieve process and reduce the expected time of waiting for the lift. Two strategies for lift selection -- the shortest distance strategy and the shortest time strategy were used and compared with the pick-up process before the improvement. On this basis, the idea of system configuration design is studied to improve the utilization rate of system space and shorten the retrieve time.The simulation model was established for experiment. The results show that, compared with the process before the improvement, the average retrieve time of the process after the improvement and using the shortest distance strategy is reduced by 17.2% to 42.3%, and the average retrieve time of the process after the improvement is reduced by 19.4% to 50.4%. The maximum space utilization rate of the system is 60.5% under experimental conditions. Based on this, further experiments were carried out to obtain the expected retrieve time of the system under different configurations, and the optimal configurations were obtained by comparison. The experimental results show that the process of picking up cars using the shortest time strategy is better after the improvement, and the system configuration design is feasible.