V.M. Matrosov

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.

A New Passive Maglev System Based on Eddy Current Stabilization

In this paper, a new passive maglev system is presented that is capable to levitate at a short distance from a dedicated guide. The magnetic suspension is assured by the repulsion of proper shaped permanent magnets that are present both on the fixed guide and on the moving suspended part. The presence of a conductive (aluminum) sheet that surrounds the magnets on the guide allows to overcome the intrinsic instability of the system when the suspended part is in relative motion with respect to the guide. The motional induced electric currents on the sheet interact with the magnets of the mover producing a stabilizing force. The detailed structure of the proposed system is described and the main results of the simulations by means of a hybrid electromagnetic FEM-MOM code coupled with the equation of motion of the rigid body are shown and commented.

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.

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.

Ultra-Precision Attitude Control of the Low-Orbital Remote Sensing Spacecraft

Abstract Nonlinear methods of a high-accuracy spatial attitude control for the large-scale remote sensing flexible spacecrafts with the effective damping of their flexi ble construction oscillations at the expense of the use of gyrodines - single gimbal control moment gyroscopes (CMGs), also with electromagnetic suspension of the gyrodines rotors, are developed.

Nonlinear Dynamics of Fault Tolerant Spacecraft Control Systems

Abstract We present new results on creation and employment of nonlinear methods and algorithms for research of logic-dynamic fault-tolerant control systems and applications these results to precision gyromoment attitude control systems on information satellites (for remote sensing, communication, navigation and geodetic) developed by the leading Russian State Research and Production Associations: Central Specialized Design Bureau (TsSKB), Samara, Applied Mechanics (NPO PM), Krasnoyarsk.

Vector Lyapunov Function Method: Theory and Application to Complex Industrial Systems

Abstract Subject of this lecture is Vector Lyapunov functions (VLF) method in nonlinear theory for large-scale systems and there industrial applications. Abstract control theory like axiomatic theory of system of processes with controls and perturbations: concepts, dynamic properties, discrete and continuous time: axiomatic VLF method. Algorithms for inference of theorems on dynamical properties for nonlinear systems. Software packages for theorem inference, for stability analysis of nonlinear systems. Application to industrial problems. Nonlinear dynamics of orbital telescopes and geostationary spacecraft. Nonlinear methods, results and software for dynamic investigations of fail-safe gyromoment attitude control systems of communication spacecrafts. Method oriented software DYNAMICS for CAD-systems.

Precision gyromoment attitude control systems of rapid manoeuvring spacecrafts for remote sensing and land-survey

Presents results for precision gyromoment attitude control systems (ACSs) for fast-manoeuvring low-orbital remote sensing spacecraft (RSS) with a moment gyrocomplex (MGC) in the form of a minimum-excessive scheme of four gyrodines (GDs) with electromagnetic suspension (EMS) of the rotors. The authors discuss the employment of mathematical models, methods, algorithms and software for their optimization and dynamic investigation.

Fail-safe gyromoment attitude control systems of communication, navigation, and land-survey satellites

Presents new results for the creation of fault-tolerant gyromoment attitude control systems (ACSs) for multipurpose and specialized spacecraft for communication, navigation and land-surveying, application of mathematical methods, and algorithms, and software for dynamics investigations.