This paper introduces a modeling and design for opening-and-closing speed control of an elevator door using ILQ design method with frequency-shaping function (FSILQ). A door opening-and-closing control system is designed by applying this method to a very low order reduced model. High performance of the resulting control system is obtained through proper modeling, simulation and repetitive experiments. It is confirmed that an inevitable vibration of the door speed due to model uncertainty can be suppressed by proper shaping of the frequency response of the closed loop transfer function from noise to output. The resulting control system is evaluated by applying ramp inputs as well as step inputs. As a result, the proposed control system has been verified to show robustness for a wide range of weight of door panels.
