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Registration Number

0207U006359, 0102U001657 , R & D reports

Title

Development of methodical basics for solving problem of dynamics analysis and creation of the algorithms for control and orientation systems of perspective space vehicles

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Head

Alpatov Anatoliy Petrovich,

Registration Date

25-04-2007

Organization

Institute of Technical Mechanics NASU and NSAU

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The research subjects are the promising versions of spacecraft (SC) (microsatellites, high-maneuverable SC for Earth observation systems) and orbital launch vehicles (LV). The aim of the research is to build fundamental mathematical models, to find techniques for analyzing the dynamics, to create new methodic approaches to synthesis of algorithms of control and orientation of the objects studied considering the possibilities of a today's element base of the measuring and controlling systems. The methods used: information and analytical methods, mathematical modeling, methods of theoretical and analytical mechanics, mechanics of a space flight, a theory of optimal control, a theory of the dynamic systems, automatic control and regression analysis. The challenges resulting from the development and the operation of SC of classes under consideration are analyzed. Pressing problems of dynamics and control for the promising technical objects are determined. Models of dynamics and control are analyzed and basic mathematical models are created. Algorithms and basic modules for computer programs of calculations of motion are built. They are tested. New methodic approaches to studies of problems in dynamics and control of the objects under consideration are developed. New algorithms for determination of SC orientation and attitude control are proposed. Mathematical and computational models are developed and improved. Developed are new methodic approaches to solution of the pressing problems of dynamics and control of the objects under consideration, including: an analysis and an evaluation of the accuracy in SV elements orientation (antennas, control system sensors, payload devices) in a given direction; analysis of the effects of errors in position of angular velocity meters on the accuracy in SC orientation; an improved accuracy in determination of SC orientation using astronomic sensors; an analysis of applicability of operation characteristics of complicated multi-regime systems of SC control under different conditions; an analysis of a possibility of SV/LV collision based on trajectory measurements of their orbital motion; determination and calculations of a subsatellites' orbit against an orbit of the main SC based on new forms of the equations of the Keplerian disturbed motions; SC dynamic and control against the mass center based on new kinematic parameters of motion of a solid; an analysis and a choice of LV control programs considering limits of motion parameters and features of their uses; verification of power potentials of existing and upgraded LVs, as well as verifications of the found control optimal programs while solving the problems on improved power. Applications: control of the promising space objects. The proposed mathematical and calculated models and new methodic approaches to solution of dynamics and control problems can be of great importance for developing the promising projects of Ukraine's space industry, as well as particular significance for evolution of theoretic fundamentals in solid mechanics, space flight dynamics and the theory of movable objects control.

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2020-04-02