HYDRAULIC SERVO TYPE MATERIAL TESTING MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a hydraulic servo type material testing machine capable of optimizing both command responsiveness and disturbance responsiveness, and stabilizing control.;SOLUTION: An output y is tracked by high responsiveness and influence of a disturbance input w is minimized without causing an overshoot to an abrupt change of a command r by composing an adjusting part 52 in a feedback loop for controlling a hydraulic drive type loading mechanism 14 from two portions 52a and 52b respectively executing proportional action and derivative action and providing a means of individually applying weight to both portions. Since integral action is not executed in the adjusting parts 52a and 52b, a term of 1/s² is eliminated from transfer functions of input and output and the control is stabilized.;COPYRIGHT: (C)2003,JPO