Patent ID: 7439700

Claim:
A control system for controlling a control amount via an actuator that converts supply power into a driving force, comprising: control amount-detecting means for detecting the control amount; target control amount-setting means for setting a target control amount as a target to which the control amount is controlled; supply power-calculating means for calculating the supply power to the actuator with a predetermined control algorithm such that the detected control amount follows up the target control amount; power parameter-detecting means for detecting a power parameter indicative of electric power actually supplied to the actuator; load parameter-calculating means for calculating a load parameter indicative of load on the actuator, based on the detected power parameter; and first determination means for determining whether or not the load parameter is not smaller than a first predetermined reference value; wherein the predetermined control algorithm includes at least one of a follow-up parameter that determines a follow-up property of the control amount to the target control amount, and a disturbance suppression parameter that determines a degree of suppression of influence of disturbance applied to the actuator, and wherein said supply power-calculating means sets the at least one of the follow-up parameter and the disturbance suppression parameter to a first predetermined value that causes the supply power to become smaller when said first determination means determines that the load parameter is not smaller than the first predetermined reference value, than when said first determination means determines that the load parameter is smaller than the first predetermined reference value.