Intelligent control algorithms to ensure the flight safety of aerospace vehicles.

An overview of the architectures, functions and algorithms of aircraft-type aerospace vehicles equipped with fly-by-wire (FBW) digital integrated control systems (ICS) is given. The ICS has a hierarchical architecture, including the primary, backup and emergency control systems with a sophisticated control reconfiguration logic in the event of failures. Digital control computers have dissimilar redundancy of equipment and software. At the atmospheric flight stage, integrator control laws provide the specified control characteristics, flight envelope protection, automatic trim of vehicle and crew workload alleviation. Further integration of manual and automatic control, implementation of the control philosophy as a continuation of the pilot's actions, more intellectual control system and human-machine interface, use of multiple control surfaces to ensure optimal vehicle configuration and alleviate structural loading together with basic control functions are considered as promising areas for ICS improvement. • Controls allocation provides optimal aerodynamic configuration of aerospace vehicle. • Consideration of forces and moments as commands simplify control system synthesis. • Eigenvalues of MIMO system transfer functions matrix define its stability margins. • Load alleviation and control functions can be realized together in MIMO system. [ABSTRACT FROM AUTHOR]