Optimal Control Strategy of Pump-controlled Hydraulic Cushion in Pre-acceleration Stage
To address the issue of poor positioning accuracy and low production efficiency of domestic hydraulic cushions,an optimal control strategy based on S-shaped curve planning method is proposed.Firstly,the high precision control requirements during the pre-acceleration phase of the hydraulic cushion controlled by the pump are analyzed,and the S-shaped curve planning method is proposed to reduce impact vibrations during system operation.Secondly,an optimal control quadratic function is constructed and an optimal control strategy based on both speed and position control requirements is designed.Finally,a simulation experimental platform for pump-controlled hydraulic cushions is built to experimentally study the proposed control strategy.The results show that the optimal control strategy based on S-shaped curve planning can achieve better control effects for both speed and position control compared with traditional PID control,which will lay a solid foundation for the engineering promotion and application of electric hydraulic servo-pump-controlled hydraulic stretching cushions.
pump control hydraulic padstate observerS-curve planningoptimal control strategy
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