CONSTANT-SPEED TRAVELLING DEVICE

摘要

A constant-speed travelling device allows a folded line approximation circuit (20) to produce approximated output of desired gain characteristics from a vehicle speed signal detected with a vehicle speed detector (19), to subject the approximated output to frequency conversion by a voltage/frequency converter (21), and to drive a motor (25) on converted frequency pulses, thereby carrying out variable gain control in approximation to the gain in the vehicle. Further, as a speed deviation (difference between the real vehicle speed and the preset vehicle speed) becomes small, the control is switched over to the constant gain control to improve stability in the control operation.