Patent ID: 7526665

Claim:
An electronically controlled suspension system having a variable damper to be controlled using a control command value, comprising: a sensor unit for extracting and providing a vertical acceleration component of a vehicle body of a vehicle; a signal processing unit for calculating a vertical velocity of the vehicle body using the vertical acceleration component provided by the sensor unit; a control gain determining unit having a control gain set according to the amplitude of the vertical acceleration component, and detecting the amplitude of the vertical acceleration component provided by the sensor unit and extracting a control gain corresponding to the detected amplitude from a nonlinear control map in which the control gain is set according to the amplitude of the vertical acceleration component, wherein the nonlinear control map comprises a plurality of linear relationships between the amplitude of the vertical acceleration component and the control gain, each of the plurality of linear relationships having a slope greater than zero; a control command value calculating unit for calculating a control command value using the control gain provided by the control gain determining unit and the vertical velocity of the vehicle body provided by the signal processing unit; and a damper driving unit for driving the variable damper based on the control command value.