Accession Number : AD0714489

Title :   The Identification of a Class of Nonlinear System Elements from Linear Measurements.

Descriptive Note : Final rept.,

Corporate Author : NAVAL SHIP ENGINEERING CENTER PHILADELPHIA PA PHILADELPHIA DIV

Personal Author(s) : Garnett,J. R.

Report Date : 15 OCT 1970

Pagination or Media Count : 52

Abstract : A conventional technique for determining the dynamic characteristics of a linear system element is the application of the Frequency Response method or Pulse Test method. These methods are also often applied to nonlinear elements at one or more operating points for the purpose of obtaining a linearized small signal model for each operating point. The Frequency Response method and Pulse Test method are both well understood and frequently used by control systems engineers for obtaining the linear characteristics of a system element. This report describes a method by which the results of either of these methods may be used to extend them to the class of nonlinear system elements which are described by nonlinear differential equations having coefficients which are functions of the dependent variables. The method is described and applied to the nonlinear modeling of a main forced draft blower. (Author)

Descriptors :   (*CONTROL SYSTEMS, MATHEMATICAL MODELS), (*NONLINEAR SYSTEMS, IDENTIFICATION), NONLINEAR DIFFERENTIAL EQUATIONS, CURVE FITTING, POLYNOMIALS, BLOWERS

Subject Categories : Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE