ELECTRO-HYDRAULIC INTEGRATED STEERING SYSTEM AND MULTI-PARAMETER COUPLING OPTIMIZATION METHOD THEREOF

An electro-hydraulic integrated steering system and a multi-parameter coupling optimization method thereof. The electro-hydraulic integrated steering system comprises a mechanical transmission module, an electric power assisted module, a hydraulic power assisted module, and a control module. A design scheme in which the electric power assisted mechanism is integrated at the bottom of an original hydraulic system steering gear, an original worm gear and worm speed reducer is replaced with a planetary gear speed reducer (18), and a mechanical rotary valve structure in an original hydraulic power assisted mechanism is reserved is adopted. On one hand, the electric and hydraulic mechanisms are highly integrated, and energy consumption can be reduced by the cooperative operation; on the other hand, the road surface information can be fed back in real time, thereby providing clear road feel for a driver. In addition, the system further has the advantages that a plurality of execution mechanisms are redundant with e