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This text makes a review about time delay system estimation in technical literature. Three approaches are examined from near distance. First, a discrete-time algorithm based on exact models and linear least squares is presented. Second, a continuous-time solution with approximate models and nonlinear least squares is analysed. And, at last, a unified estimation method of an overall model, based on...
This paper tries to provide a comprehensive and explicit introduction of an algorithm to estimate LTI systems with time delay. The presentation extends a simple continuous-time estimator preserving simplicity and improving usability. The paper closes with directions for further enhancement of the algorithm that includes the use of rational approximations of delay and operation in discrete time.
This paper presents a sensorless control scheme for a surface-mounted permanent-magnet synchronous machine (SM-PMSM) using the high frequency voltage signal injection method. The reactances of the high frequency model vary as a function of rotor position and a simple method based on measured high frequency currents and voltages is used to identify these reactances. Using such motor reactances, rotor...
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