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Fuzzy Sets and Systems 128 (2002) 81–93
www.elsevier.com/locate/fss
Design and real-time implementation of a multivariable gyro-mirror
line-of-sight stabilization platform
K.C. Tana; ∗ , T.H. Leea , E.F. Khora , D.C. Angb
a Department
of Electrical & Computer Engineering, National University of Singapore, 10 Kent Ridge Crescent,
Singapore 119260, Singapore
b Seagate Technology International, 63 The Fleming, Science Park Drive, Singapore Science Park, Singapore 118249, Singapore
Received 5 January 2000; received in revised form 19 April 2001; accepted 15 May 2001
Abstract
Gyro-mirror line-of-sight stabilization platform is a nonlinear, multivariable and highly coupled system. It forms the basis
of a wide range of practical instruments used for the purposes of sighting and targeting in both surface and airborne vehicles,
which is capable of maintaining the sightline of a mirror when it is subjected to external disturbances. However, a spinning
gyro has a property known as precession such that when a torque is applied to one axis, it will contrary to the intuition
of mechanics, and results the rotation in the direction of another axis. This behavior poses a problem in controlling the
line-of-sight since movement about one axis will cause a coupled movement in the other. In this paper, an e cient full-matrix
fuzzy logic controller is designed and implemented for a practical nonlinear gyro-mirror line-of-sight stabilization platform.
Both simulation and real-time experimental results demonstrate the e ectiveness of the designed full-matrix fuzzy gyroscope
control system, which o ers an excellent closed-loop response for the transient and tracking performances, with signiÿcant
reduction in the coupling e ect against cross-axis interactions. c 2002 Elsevier Science B.V. All rights reserved.
Keywords: Fuzzy control; Gyro-mirror; Genetic algorithms; Engineering applications
1. Introduction
Electro-optical (EO) sensors that are mounted on...