Cybernetics

Cybernetics is a wide-ranging field concerned with circular causal processes such as feedback. Norbert Wiener named the field after an example of circular causal feedback—that of steering a ship where the helmsman adjusts their steering in response to the effect it is observed as having, enabling a steady course to be maintained amongst disturbances such as cross-winds or the tide. Cybernetics is concerned with circular causal processes however they are embodied, including in ecological, technological, biological, cognitive and social systems and also in the context of practical activities such as designing, learning, managing, etc. Its transdisciplinary character has meant that cybernetics intersects with a number of other fields, leading to it having both wide influence and diverse interpretations. Cybernetics has been defined in a variety of ways, reflecting "the richness of its conceptual base." One of the most well known definitions is that of Wiener who characterised cybernetics as concerned with "control and communication in the animal and the machine." Another early definition is that of the Macy cybernetics conferences, where cybernetics was understood as the study of "circular causal and feedback mechanisms in biological and social systems." Margaret Mead emphasised the role of cybernetics as "a form of cross-disciplinary thought which made it possible for members of many disciplines to communicate with each other easily in a language which all could understand." Other definitions include: "the art of governing or the science of government" (André-Marie Ampère); "the art of steersmanship" (Ross Ashby); "the study of systems of any nature which are capable of receiving, storing, and processing information so as to use it for control" (Andrey Kolmogorov); "a branch of mathematics dealing with problems of control, recursiveness, and information, focuses on forms and the patterns that connect" (Gregory Bateson); "the art of securing efficient operation" (Louis Couffignal); "the art of effective organization.

Plug-and-play fault diagnosis and control-reconfiguration for a class of nonlinear large-scale constrained systems

Plug-and-play fault diagnosis and control-reconfiguration for a class of nonlinear large-scale constrained systems