Accession Number : ADA292861

Title :   Computational Methods for Control and Optimal Design of Aerospace Systems.

Descriptive Note : Final technical rept. 1 Jan 92-31 Mar 94,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG INTERDISCIPLINARY CENTER FOR APPLIED MATHEMATICS

Personal Author(s) : Burns, J. A. ; Cliff, E. M.

PDF Url : ADA292861

Report Date : 31 MAY 1994

Pagination or Media Count : 16

Abstract : This final technical report contains a summary of the research funded by AFOSR under Grant F49620-92J-0078, titled Computational Methods for Control and Optimal Design of Aerospace Systems, for the period 1 January 1992 to 31 March 1994. During this period, the investigators concentrated on five problems; optimal design of forebody simulators, control of highly maneuverable aircraft, control of fluid flows, modeling and identification of smart materials, and robust control of nonlinear conservation laws. A new sensitivity equation method was developed for shape optimization and flow tailoring. This method was transitioned into software at the Arnold Engineering Development Center and at Virginia Tech. A new mathematical model for aircraft agility was used to investigate feedback control laws for time optimal maneuvers. New vortex shedding patterns were discovered for unsteady flows about rotating cylinders. The work on smart materials produced new models and computational methods for the dynamics of shape memory alloys. In addition, robust control theory was applied to nonlinear conservation laws yielding a new approach to sensor location. The report contains a complete list of papers produced during this period. (AN)

Descriptors :   *MATHEMATICAL MODELS, *OPTIMIZATION, *COMPUTATIONAL FLUID DYNAMICS, *CONTROL THEORY, ALGORITHMS, COMPUTERIZED SIMULATION, MANEUVERABILITY, COMPUTER AIDED DESIGN, AERODYNAMIC STABILITY, VORTEX SHEDDING, MATHEMATICAL PROGRAMMING, AEROSPACE SYSTEMS, FLOW FIELDS, NONLINEAR SYSTEMS, CYLINDRICAL BODIES, FEEDBACK, PARTIAL DIFFERENTIAL EQUATIONS, UNSTEADY FLOW, NUMERICAL METHODS AND PROCEDURES, FLIGHT MANEUVERS, BOUNDARY LAYER CONTROL.

Subject Categories : Operations Research
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE