Ye.I. Somov

Ultra-precision attitude control of a large low-orbital space telescope

Abstract Nonlinear methods of high-accuracy spatial attitude control for a flexible large-scale remote-sensing spacecraft are described. The effective damping of oscillations within such a flexible structure, using gyrodines (single gimbal control moment gyroscopes) with electromagnetic suspended rotors, is also developed. Ultra-precise image motion stabilization is achieved by moving image compensators in an onboard optical telescope.

Coupling and damping the structure oscillations at spacecraft gyromoment digital control

New approach for modeling a physical hysteresis and nonlinear methods for a gyro coupling and damping a flexible spacecraft structure through using gyrodynes (GDs)-single gimbal control moment gyros, are developed. New results on synthesis of the spacecraft digital control systems with effective damping oscillations of the flexible spaceframes, are presented.

Nonlinear Synthesis, Optimization and Design of the Spacecraft Gyromoment Attitude Control Systems*

Abstract The optimization methods for a high-accuracy nonlinear feedback attitude control of the large-scale flexible spacecraft under their spatial rotation manoeuvers are described. The effective damping of oscillations within such flexible structures, using gyrodynes (single gimbal control moment gyroscopes) with electromagnetic suspended rotors, are developed. Some mathematical methods, software for computer-aided design and results are presented.

Methods and Software for Research and Design of Spacecraft Robust Fault Tolerant Control Systems

Abstract Brief analytic overview on methods for research of the robust fault tolerant control systems in aerospace is given. New results on nonlinear methods and software at this topic closelly connected to design and flight support of the precise gyromoment attitude control systems for the information spacecraft (remote sensing, communication, navigation and geodetic) developed on an order the leading State Research and Production Associations of Russian Space Angency - TsSKB (Samara) and NPO PM (Krasnoyarsk), are presented.

Computer aided design and flight support of spacecraft control systems

Abstract We present results on creation and employment of the software system DYNAMICS for research of dynamic processes in complex control systems. The software tool supports functions modelling and simulation for spacecraft, control systems design, as well as solving any user problems in special problem areas which are described by differential and difference equations, also by transfer functions and logic conditions including a logic automata for real time. We present also the decision support system, which is based on the DYNAMICS and is used by the flight controller at the spacecraft Flight Control Center in the process of state diagnostics and decision-making on contradictory failures in the onboard spacecrafts motion control system.

Methods and Software for Nonlinear Dynamic Research of Spacecraft Fault Tolerant Control Systems

Abstract New results on methods and software for nonlinear dynamic research and design of the precise gyromoment fault tolereant control systems by the information spacecraft (remote sensing, communication, navigation and geodetic) developed by the leading Russian State Space Research and Production Associations (RPAs) — the TsSKB -Progress and the NPO PM , are presented.

Spacecraft guidance and robust attitude control with precise pointing the flexible antennas

New approach for modelling a physical hysteresis damping the flexible spacecraft structure oscillations, is developed. New results on spacecraft attitude guidance and digital robust control with precise pointing the large-scale flexible antennas, are presented.

ROBUST NONLINEAR GYROMOMENT CONTROL OF AGILE REMOTE SENSING SPACECRAFT

Abstract Some problems on robust gyromoment motion control of agile spacecraft (SC) for remote sensing the Earth surface are considered. Elaborated methods for dynamic research of the SC programmed angular motion at principle modes under external, structural and parametric disturbances, partial discrete measurement of the state and digital control of the gyro moment cluster (GMC) by the minimum-excessive gyrodine scheme, are presented.

NONLINEAR DYNAMIC RESEARCH OF THE SPACECRAFT ROBUST FAULT TOLERANT CONTROL SYSTEMS

Abstract New results on methods and software for nonlinear dynamic research and design of robust gyromoment fault tolerant control systems by the information spacecraft (remote sensing, communication, navigation and geodesic) developed by the leading Russian State Space Research and Production Associations (RPAs) — the TsSKB-Progress and the NPO PM , are presented.

Fault-Tolerant Attitude Control Systems of the Communication and Navigation Spacecraft*

Abstract We present new results on creation and employment of nonlinear methods, algorithms and software for dynamic research of the precision faulttolerant gyromoment attitude control systems of the Russian spacecrafts for communication, navigation and geodetic purposes.