Accession Number:

ADA232795

Title:

Nonlinear Dynamics and Control of Flexible Structures

Descriptive Note:

Final rept. 1 Sep 1987-31 Aug 1990

Corporate Author:

TECHNO-SCIENCES INC GREENBELT MD

Report Date:

1990-10-10

Pagination or Media Count:

141.0

Abstract:

Basic system requirements for space-based directed energy weapons will require unprecendented levels of control system performance to achieve slewing maneuvers for rapid retargeting and precision alignment of structural components supporting optical system components. Rapid, multiaxis slewing maneuvers will excite multibody dynamics involving nonlinear interactions with structural flexure. Advanced methods of modeling multibody systems with structural flexure are described and several issues in modeling slewing and pointing maneuvers for multibody systems are discussed based on Lagranges method. Advanced methods in nonlinear control system design based on dynamic inversion by feedback linearization are then applied to a generic model of a Space Based Laser system. Connections with methods of sliding mode control are described along with practical aspects of implementation. Reduced order modeling issues and implementation of feedback linearizing control for robust stabilization are described. Experiments are outlined for validation and demonstration of critical aspects of nonlinear control for rapid, large angle slewing and precision pointing.

Subject Categories:

  • Directed Energy Weapons

Distribution Statement:

APPROVED FOR PUBLIC RELEASE