Accession Number:

ADA257632

Title:

The Design of an Adaptive Attitude Control System

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1992-09-01

Pagination or Media Count:

91.0

Abstract:

This research designed and simulated an adaptive attitude control system for the Crew EquipmentRetriever CER during autonomous attitude hold and large angle or slewing maneuvers. The CER is a proposed space robot that deploys from the Space Station and retrieves any lost equipment or incapacitated astronauts. The moment of inertia tensor for the CER and acquired target is not known a priori. In this research, the moment of inertia tensor is estimated by a Kalman filter and used to update the derived linear quadratic regulator LQR and quaternion feedback regulator QFR control laws. Computer simulation results show that during attitude hold the adaptive LQR design stabilizes the CER and provides a more fuel efficient controller effort as compared with a previously designed nonadaptive minimum time controller and a nonadaptive LQR design. Computer simulation results of slewing maneuvers show that the adaptive QFR design provides a more fuel efficient controller as compared with a nonadaptive QFR design.

Subject Categories:

  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE