Reliability increasing through networked cascade control structure - consideration of quasi-redundant subsystems

Jan Galdun (1, 2) , Jean-Marc Thiriet (1) , Jan Ligus (2) , Jan Sarnovsky (2)

1 GIPSA-SA-IGA - GIPSA - Signal et Automatique pour le Diagnostic et la Surveillance
2 Department of Cybernetics and Artificial Intelligence

The paper presents common cascade control architecture where specific kind of redundancy could be considered. There are different approaches how to increase the reliability of networked control systems. Common approach uses redundant components in control system i.e. passive or active redundancy. We deal with quasi-redundant subsystems (shared redundancy) which could be very useful when critical failure appears. This type of redundancy offers several important advantages such as minimizing the number of components as well as reliability increasing. The example of a four-rotor mini-helicopter is presented where a cascade control architecture is considered. The main contribution of this paper is that it helps to determine the applications where quasi-redundant subsystems are a good solution to remain in a significant reliability level even if critical failure appears.

Mots clés: quasi (shared) redundancy; low cost; Networked control systems; Cascade control architecture; Reliability analysis

Domaines: Automatique / Robotique

Jan Galdun, Jean-Marc Thiriet, Jan Ligus, Jan Sarnovsky. Reliability increasing through networked cascade control structure - consideration of quasi-redundant subsystems. IFAC WC 2008 - 17th IFAC World Congress, Jul 2008, Séoul, South Korea. pp.6839-6844. ⟨hal-00349419⟩