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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41287

Title: Spacecraft nonlinear control
Authors: Sheen,Jyh-Jong;Bishop,Robert H.
Contributors: 國立臺灣海洋大學:機械與機電工學系
Date: 1992-02
Issue Date: 2017-02-14T01:50:38Z
Publisher: Spaceflight mechanics
Abstract: Abstract:The feedback linearization technique is applied to the problem of spacecraft attitude control and momentum management with control moment gyros (CMGs). The feedback linearization consists of a coordinate transformation, which transforms the system to a companion form, and a nonlinear feedback control law to cancel the nonlinear dynamics resulting in a linear equivalent model. Pole placement techniques are then used to place the closed-loop poles. The coordinate transformation proposed here evolves from three output functions of relative degree four, three, and two, respectively. The nonlinear feedback control law is presented. Stability in a neighborhood of a controllable torque equilibrium attitude (TEA) is guaranteed and this fact is demonstrated by the simulation results. An investigation of the nonlinear control law shows that singularities exist in the state space outside the neighborhood of the controllable TEA. The nonlinear control law is simplified by a standard linearization technique and it is shown that the linearized nonlinear controller provides a natural way to select control gains for the multiple-input, multiple-output system. Simulation results using the linearized nonlinear controller show good performance relative to the nonlinear controller in the neighborhood of the TEA.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41287
Appears in Collections:[機械與機電工程學系] 期刊論文

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