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

Robust Control of a Spacecraft Respinup by Weak Internal Forces

“…Optimization (Somov, 2000) and robust gyromoment control problems (Somov et al, 1999b;Matrosov and Somov, 2003) were also considered for…”

Nonlinear Dynamic Research of the Spacecraft Robust Fault Tolerant Control Systems

“…For information SC it is important to minimize the MGC mass and provide the possibility for reconfiguration of its structure and control algorithms for 2-3 possible faults in any executive device of the MGC. The authors had been executed multilateral analysis of schemes for constructing the small-mass MGC based on RWs, various types of single-and two-gimbal GWs, the GDs with both the gear stepping drives (GSDs) and the moment gearless drives (MGDs) on their precession axes, in combination with unloading loops of accumulated angular momentum (AM) by reaction trusters and/or a magnetic torquers (Somov et al, 1999b). • the configurations Z-I, I=1:4 -the MGC without GD-I, represented at the nominal state in Fig.…”

“…Moreover, the closedloop nonlinear system (13), (14) is transformed to a simplest linear system for the SC spatial attitude control. Simultaneously constructing the VLF's components using the Vandermonde matrix is analytically executed, the VLF's structure υ(x) = υ(E,ω) has become known, and for obtaining the inverse transformation x = Ψ(z) in the explicit form it is sufficient to use the analytic inverse of matrix Q e (Somov et al, 1999b).…”