Parametric Identification of Electric Drives Based on Performance Limits

Abstract

Identification methods for the dynamic systems are considered with respect to electric drives. It is shown that electric drives are complex electromechanical systems, the mechanical part of which is multimass and contains elements with elastic connections. The features of these systems that require considering the gaps in gear units when solving modeling and identification problems; elasticity arising in the shafts; stiffness change of elastic elements in couplings. It is noted that the identification problem of electric drives is a subproblem of managing the state of electromechanical systems. The basis of methods and algorithms for its solution is a set is information about the performance limits of the electric drive. It is shown that identification of the controlled parameters of the electric drive requires using statistical methods based on the expansion of the pulse transient functions to a series of the orthonormal Laguerre transformed system of functions. The method has been proposed in order to assess the condition of the electric drive during operation. This method involves setting the performance limits as a set of boundary points. A distinctive feature of the method is the high identification accuracy.