Patent ID: 8384570
Filing Date: 2013-02-26
Classification: G01D

Abstract:
1. An encoder interpolator, comprising: a state estimator that demodulates and interpolates received encoder signals, wherein the state estimator incorporates a model of a physical system being monitored by an encoder being processed, wherein a sample rate of the state estimator is faster than a highest frequency of the encoder being processed, and wherein the state estimator determines an estimated position of the physical system being monitored by the encoder being processed and compares the estimated position with an encoded position that is encoded in the received encoder signals, wherein the state estimator determines an estimated error that is a difference between the estimated position determined using the model and the encoded position determined from the received encoder signals, and wherein the state estimator outputs the estimated position and the estimated error; and a circuit that receives from the state estimator the estimated position and the estimated error and determines update information that is used to modify the encoder signals that are received by the state estimator.