Abstract: A system for detecting a presence of a person in a hoistway, having: one or more controllers configured to authenticate the person in the hoistway; the one or more controllers being operationally connected to an elevator car in the hoistway and configured to determine whether the person is within a predetermined distance of the elevator car from a signal emitter on the person; wherein when the person is within the predetermined distance of the elevator car, the one or more controllers is configured to transmit a feedback request to the person and stop the elevator car unless the one or more controllers receives feedback to the feedback request within a predetermined period of time.

Abstract: A sprung mass velocity estimating apparatus used in a four-wheeled vehicle to estimate a sprung mass velocity of a point of a vehicle body corresponding to each wheel of the vehicle, includes a state quantity detecting unit which detects a state quantity of the vehicle, a base value calculating unit which calculates a sprung mass velocity base value for each of the four vehicle body points based on a detection result of the state quantity detecting unit by using a prescribed oscillation model, and a sprung mass velocity calculating unit which calculates the sprung mass velocity for each vehicle body point by mutually adjusting the sprung mass velocity base values for the four vehicle body points such that the four vehicle body points are located on a common flat plane.

Abstract: A control device for controlling a variable damper of a wheel suspension system includes a first sensor detecting a first dynamic state variable of a vehicle body, a damping force base value determining unit determining a target damping force base value, a second sensor detecting a second dynamic state variable of the vehicle body; a correction value determining unit determining a damping force correction value, and a target damping force determining unit determining a target damping force. When the differential value of the lateral acceleration is relatively high (or the target damping force is high), a drive current to the variable damper is increased. The same is true when the vehicle is undergoing a pitching movement. The target damping force may be obtained by subtracting the damping force correction value from the target damping force base value.

Abstract: In a control device for controlling a variable element of a wheel suspension system, the variable suspension element associated with one of the wheels is controlled at least according to an output of a sensor associated with a different one of the wheels. The output of the sensor may include a sprung mass speed of a vehicle part associated with each wheel. The variable suspension element may include a variable damping force damper or a variable spring constant spring. Thereby, an undesired response of a vehicle body can be avoided even when a vehicle is subjected to an uneven distribution of wheel loads such as when the vehicle is traveling over a slanted road surface or making a turn.

Abstract: In a control device for controlling a variable element of a wheel suspension system, the variable suspension element associated with one of the wheels is controlled at least according to an output of a sensor associated with a different one of the wheels. The output of the sensor may include a sprung mass speed of a vehicle part associated with each wheel. The variable suspension element may include a variable damping force damper or a variable spring constant spring. Thereby, an undesired response of a vehicle body can be avoided even when a vehicle is subjected to an uneven distribution of wheel loads such as when the vehicle is traveling over a slanted road surface or making a turn.

Abstract: A sprung mass velocity estimating apparatus used in a four-wheeled vehicle to estimate a sprung mass velocity for each wheel of the vehicle, comprises a state quantity detecting unit for detecting a state quantity of the vehicle, a base value calculating unit for calculating a sprung mass velocity base value for each of the four wheels based on a detection result of the state quantity detecting unit by using a prescribed oscillation model, and a sprung mass velocity calculating unit for calculating the sprung mass velocity for each wheel by mutually adjusting the sprung mass velocity base values for the four wheels.

Abstract: A control device for controlling a variable damper of a wheel suspension system includes a first sensor detecting a first dynamic state variable of a vehicle body, a damping force base value determining unit determining a target damping force base value, a second sensor detecting a second dynamic state variable of the vehicle body; a correction value determining unit determining a damping force correction value, and a target damping force determining unit determining a target damping force. When the differential value of the lateral acceleration is relatively high (or the target damping force is high), a drive current to the variable damper is increased. The same is true when the vehicle is undergoing a pitching movement. The target damping force may be obtained by subtracting the damping force correction value from the target damping force base value.

Abstract: A vibration model storage unit stores a vibration model which is made up of an unsprung part, a sprung part, a damper, a tire and a suspension spring, an actual relative distance detection unit detects an actual relative distance of the unsprung part to the sprung part, and a deviation calculation unit calculates a deviation between an estimated relative distance of the unsprung part to the sprung part that is estimated by the vibration model and the actual relative distance. An input parameter calculation unit calculates an input parameter that is inputted into the vibration model from a road surface based on the deviation calculated by the deviation calculation unit, and a vehicle state quantity calculation unit calculates a quantity of state of a vehicle by applying the input parameter to the vibration model.

Abstract: A control device of a variable damping force damper for controlling a damping force of a damper used in a vehicle suspension system comprises: relative displacement detection means for detecting a value corresponding to a relative displacement between a vehicle body and a wheel in a vertical direction; relative speed detection means for detecting a value corresponding to a relative speed between the vehicle body and the wheel in the vertical direction; multiplying means for multiplying the value corresponding to the relative displacement and the value corresponding to the relative speed; and means for setting a damping force control target value of the damper based on the output from the multiplying means.

Abstract: A control device of a variable damping force damper for controlling a damping force of a damper used in a vehicle suspension system comprises: relative displacement detection means for detecting a value corresponding to a relative displacement between a vehicle body and a wheel in a vertical direction; relative speed detection means for detecting a value corresponding to a relative speed between the vehicle body and the wheel in the vertical direction; multiplying means for multiplying the value corresponding to the relative displacement and the value corresponding to the relative speed; and means for setting a damping force control target value of the damper based on the output from the multiplying means.