Accession Number : AD0688796

Title :   DETERMINATION OF DYNAMIC MODEL PARAMETERS USING QUASILINEARIZATION.

Descriptive Note : Technical rept.,

Corporate Author : LOUISIANA STATE UNIV BATON ROUGE COLL OF ENGINEERING

Personal Author(s) : Ramaker,Brian L. ; Smith,Cecil L. ; Murrill,Paul W.

Report Date : JUN 1969

Pagination or Media Count : 31

Abstract : The paper discusses the application of quasilinearization to the specific problem of determining the parameters in a dynamic model. The model includes parameters related to the system time constants, the gain, and the dead time (transportation lag or time delay). The objectives of this study are: (1) To show that quasilinearization can be used to determine all model parameters including a dead time (transportation lag). (2) To minimize the number of calculations per iteration by: (a) Calculating the solution in terms of parameter changes rather than the parameters themselves, which removes the necessity of calculating the particular solution. (b) Using the model equation instead of the fundamental solutions to update the output and its derivatives. (3) To investigate various methods to increase the parameter space in which convergence will occur, including: (a) Incorporation of Marquardt's Method into quasilinearization. (b) Only taking a portion of the calculated step. (Author)

Descriptors :   (*CONTROL SYSTEMS, MATHEMATICAL MODELS), (*NONLINEAR DIFFERENTIAL EQUATIONS, NUMERICAL METHODS AND PROCEDURES), BOUNDARY VALUE PROBLEMS, ITERATIONS, COMPUTER PROGRAMMING, CONVERGENCE, AUTOMATION

Subject Categories : Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE