Road feeling planning method for drive-by-wire electro-hydraulic composite steering

The invention provides a drive-by-wire electro-hydraulic composite steering road feeling planning method, which comprises the following steps of: firstly, estimating equivalent steering resistance torque of an electro-hydraulic composite steering system based on a motor model and a vehicle dynamics model respectively, and then comprehensively estimating drive-by-wire equivalent steering resistance torque through a longitudinal speed weight method; combining the designed electric power-assisted characteristic curve with the hydraulic power-assisted characteristic curve to obtain a power-assisted characteristic curve of the wire-controlled electro-hydraulic composite steering system, and constructing a relationship between equivalent steering resistance torque and simulated hand torque of the wire-controlled electro-hydraulic composite steering system according to the power-assisted characteristic curve of the wire-controlled electro-hydraulic composite steering system; and finally, according to the equivalent