Control Systems of Moving Objects

Journal of Computer and Systems Sciences International

, Volume 50, Issue 1, pp 144-157

On optimal spacecraft damping

  • M. V. LevskiiAffiliated withScientific Research Institute of Space Systems, Khrunichev State Research and Production Center

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Abstract

The problem of spacecraft damping (damping of initial angular velocity to zero) for a minimal time is studied. Two variants of formulation of the optimization problem are considered; these variants differ in the form of constraints on the control torque. Analytical solution to the formulated problem is obtained in the closed form and numerical expressions for synthesis of optimal angular velocity control program are given. Similar problem of time-optimal angular acceleration of the spacecraft to the given value is also solved. Procedure for determination of the control torque at the initial time instant for the problem of acceleration of the spacecraft to the required angular velocity is presented. Numerical example of solution of the problems of buildup and damping of spacecraft rotation velocity for a minimal time is given.