摘要：In order to study the strong force/position coupling problem of passive electro-hydraulic force servo system, taking the valve control swing motor of passive electro-hydraulic force servo system as an object, a new principle of structure coupling is proposed, which based on the analysis of the force/position coupling mechanism and influence factors. The concrete way is to design the load actuator into a compound bilayer structure, which the outer synchronous motor is used to track the bearing motor for position synchronization control, and the inner motor is used to load. Through the load actuator of the compound structure, the passive load is modified into active load, and the problem of force/position coupling is solved fundamentally. The principle of parameter matching, the design of the seal, and the structure of the compound swing motor are given, and the rationality of the oil duct in the inner and outer motors is simulated and tested. Finally, through simulation analysis of passive electro-hydraulic force servo system under small gradient loading, the correctness and effectiveness of structure decoupling are verified. Furthermore, it provides a new approach for the development of passive electro-hydraulic force servo system for ultimate parameter and performance index.
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