DEVICE FOR CORRECTING MOTOR INPUT AND OUTPUT COEFFICIENT OF ELECTRIC VEHICLE OF RIGHT AND LEFT STEERED WHEEL INDEPENDENT DRIVE SYSTEM

摘要

PROBLEM TO BE SOLVED: To make it possible to correct the input and output characteristics of both motors of an electric vehicle whose right and left steered wheels are driven by each motor so as to match actual characteristics, even without a traveling space and without being affected by road surface.;SOLUTION: First, a steering wheel is locked at the neutral position (S1, S2). Right and left non-steered wheels (right and left rear wheels) are fixed to put the electric vehicle in a stop state at S3, S4. At S5, same input (voltage) commands are impressed to the motors of the right and left steered wheels (right and left front wheels) so as to provide a driving force to the right and left steered wheels(right and left front wheels) in a non-rotating state. At S6, kick back torque Tst is checked toward a steering system arising from the difference of the driving force between the right and left front wheels. If this kick back torque is large, an average values Tav of right and left front wheel motor torque are obtained from the Tst at S7, S8. Motor input and output coefficients that make the right and left steered wheel motor torque both become the average value Tav above under the same motor input (voltage) command value are treated as after-correction input and output coefficients of the right and left steered wheel motors. Based on these coefficients, input command values for the target driving force of the motors are obtained.;COPYRIGHT: (C)2005,JPO&NCIPI