| 摘要 |
PROBLEM TO BE SOLVED: To freely select a plurality of rudder angle ratio modes with a driver and to improve maneuverability by providing a target rudder angle ratio setting means setting a plurality of target rudder angle ratio modes, and selecting a target rudder angle ratio mode based on the mode set information from a manually operated switch means. SOLUTION: When a handle is operated, the displacement quantity of the moving housing of a variable-rudder angle ratio mechanism 5 is detected by a rudder angle ratio sensor 10, and it is sent to a control means 13 as the actual rudder angle ratio signal Cj. The control means 13 calculates the deviationΔC between the target rudder angle ratio signal Cs corresponding to the vehicle speed signal V from a vehicle speed sensor 12 and the actual rudder angle ratio signal Cj with a deviation calculating means 22 and feeds the motor control signal Vo based on the deviationΔC to a motor driving means 14 from a drive control means 23. When a switch means 15 is operated by a driver, the target rudder angle ratio mode is selected by a mode selecting means 24, and the target rudder angle ratio signal is determined by a target rudder angle ratio setting means 21 based on the selected target rudder angle ratio mode. |
