Transmission control system

A transmission control system comprising:

• positioning control means for positioning a shift arm at a predetermined target position by controlling the operation of an actuator connected to the shift arm which is provided in a transmission to perform a selecting operation and a shifting operation and which is selectively engaged with a shift piece secured to each of a plurality of speed shift forks by the selecting operation to displace one of the shift forks corresponding to the selectively engaged shift piece from a neutral position so as to establish a predetermined speed by the shifting operation,
• wherein the position control means specifies a position of the shift arm to the target position based on a first parameter (VPOLE f sc, VPOLE f Sl) for setting a follow-up characteristic of an actual position of the shift arm to follow the target position and a second parameter (VPOLE sc, VPOLE f sc) for setting a disturbance suppressing characteristic, and
• wherein the positioning control means is a controller having two degrees of freedom that is capable of independently specifying the first parameter and the second parameter, and is capable of specifying the second parameter based on the actual position or the target position of the shift arm.