Reduction of linear drive collaborative rectification pump flow ripple

Linear drive collaborative rectification pump is designed for Electro-Hydrostatic Actuator to avoid the lateral force in axial piston pump. In nominal working condition, the volumetric flow ripple and dynamic reverse flow pulse are still inevitable. On one hand, the structural flexibility makes it possible to reduce the volumetric flow ripple by proposed control method, which is verified by simulation and experiment. On the other hand, by reference to axial piston pump, dead volume variation and valve slot are considered as approaches of reducing the dynamic reverse flow pulse, where dead volume variation method is proved infeasible due to collaborative rectification mechanism, and valve slot is effective and optimized to improve the performance.