The Evolution of the Concept of Controllability
Shiva Shankar · Mathematical and Computer Modelling of Dynamical Systems · 2002
This paper traces the evolution of the central concept of controllability of state space systems introduced by Kalman to its behavioural generalisation byWillems, and beyond to distributed behaviours. It turns out that controllability in this new formalism is identical to the notion of a potential in physics or of exactness in mathematics.