Title
Application of model following control and estimation techniques to attitude control of manoeuvring spacecraft Part I: Theory and simulation results
Author
Zwartbol, T.
Terpstra, A.P.
van Woerkom, P.T.L.M.
van den Dam, R.F.
Institution
National Aerospace Laboratory NLR
Date
1982-10-15
Abstract
This document presents an approach to sampled data, on-board estimation and control of the attitude motion of manoeuvring spacecraft. Algorithms which are developed include: a - model following control of attitude manoeuvres b - estimation of spacecraft state (attitude, angular velocity, disturbance torque) c - optical-inertial attitude determination, with estimation of gyro parameters (drift rate bias, scale factor error). The algorithms were validated in single-axis software simulations of an attitude control system of the type as used in the Infra Red Astronomical Satellite (IRAS). The considered control system comprises a strapdown rate-integrating gyro and a slit-type star sensor for optical-inertial attitude sensing, a reaction wheel actuator, and a digital on-board computer. The truth models for simulation of the hardware components are discussed. The estimation and control algorithms are described, design trade-offs are discussed, and simulation results are presented. In Part II a general overview of the tasks of the simulation program is presented, and program design aspects are discussed. Each module is then described separately and flow charts are given. Finally, implementation aspects specific to the computer used, as well as some execution characteristics are briefly discussed.
Subject
algorithms
Satellite attitude control
Airborne/spaceborne computers
reaction wheels
gyroscopes
strapdown guidance
guidance sensors
infrared astronomy satellite
Control simulation
Orbital position estimation
spacecraft maneuvers
Data Sampling
Kalman filters
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Publisher
Nationaal Lucht- en Ruimtevaartlaboratorium
Access restriction
Campus only
Source
NLR-TR 82116 U Part 1
Part of collection
Aerospace Engineering Reports
Document type
report
Rights
(c)1982 National Aerospace Laboratory NLR