Patent ID: 8321059

Claim:
An apparatus to calibrate a valve assembly including a valve, an actuator and a position sensor, the apparatus comprising: an interface to receive a first value representative of a current position of the valve and to receive a second value representative of a sensitivity of the position sensor; an endpoint estimator to compute a first estimated value of a first position signal corresponding to an expected fully-open position of the valve based on a received position signal and the received first and second values, and to compute a second estimated value of a second position signal corresponding to an expected fully-closed position of the valve based on the received position signal and the received first and second values, the first and second estimated values are computed without repositioning the valve between computation of the first and second estimated values, wherein at least one of the interface and the endpoint estimator is implemented via a processor; and a valve control module to, in response to a control signal representative of a desired position of the valve, control the actuator to position the valve at substantially the desired position based on the first and second estimated values.