Discrete Multi-Layer Estimator Implementation for Sensorless Control of Elastic Drive Systems An Industrial Case Study

Mattia Rossi, Marco Mauri, Francesco Castelli Dezza, Maria Stefania Carmeli

Abstract

Sensorless AC drives do not require speed sensor and have the advantage of high reliability and low cost. The sensorless control techniques require the estimation of internal state variables and the accuracy of this estimation influences the overall control performances. Moreover, implementation of a state observer which computes speed signal and the use of digital filter introduce intrinsic delays which affect electrical drive performances. The result is a deterioration of control performances even if control parameters are correctly tuned. The control of a dualinertia elastic system is a critical application because of the undesired mechanical oscillations and its sensitivity to motor speed feedback estimation. This paper presents a multi-layer estimator to control a dual inertia elastic system.

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IMEKO TC

TC10 - Measurement for Diagnostics, Optimization and Control

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