Accession Number : ADA260867


Title :   ASTROS-ID: Software for System Identification Using Mathematical Programming


Descriptive Note : Final rept. Jun-Dec 1991


Corporate Author : CSA ENGINEERING INC PALO ALTO CA


Personal Author(s) : Gibson, Warren C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a260867.pdf


Report Date : Sep 1992


Pagination or Media Count : 45


Abstract : ASTROS is a multidisciplinary optimization computer program developed for Wright Laboratory. It seeks minimum weight structural designs subject to constraints on displacements, stresses, vibration frequencies, flutter speeds, etc. The program is based on a versatile set of software tools including a relational database, a matrix programming language, and an input description facility, all of which make the program readily extensible by knowledgable users. This report documents an extension to ASTROS (called ASTROS-ID) which makes it possible to tune finite element models to enhance their correspondence with measured frequencies and mode shapes. ASTROS existing optimization package is used to construct a constrained minimization problem where the user may choose to include particular frequencies and mode shape entries either in the objective function, in a least squares sense, or in constraints which require conformance within a given tolerance. Other terms include an excursion penalty and a weight deviation penalty. At the time of writing, ASTROS-ID was still in the research stage and had not been subject to beta testing.


Descriptors :   *COMPUTER PROGRAMS , *MATHEMATICAL PROGRAMMING , *IDENTIFICATION SYSTEMS , *COMPUTER APPLICATIONS , STRESSES , DATA BASES , INPUT , OPTIMIZATION , TOOLS , DISPLACEMENT , PROGRAMMING LANGUAGES , FLUTTER , PENALTIES , WRITING , TOLERANCE , WEIGHT , RESONANT FREQUENCY , IDENTIFICATION , TIME , SHAPE , COMPUTER PROGRAMMING , COMPUTERS , MODELS , VIBRATION , FREQUENCY , VELOCITY


Subject Categories : Information Science
      Computer Programming and Software


Distribution Statement : APPROVED FOR PUBLIC RELEASE