Editing Control theory (section)

==People in systems and control==
{{Main|People in systems and control}}
Many active and historical figures made significant contribution to control theory including
* [[Pierre-Simon Laplace]] invented the [[Z-transform]] in his work on [[probability theory]], now used to solve discrete-time control theory problems. The Z-transform is a discrete-time equivalent of the [[Laplace transform]] which is named after him.
* [[Irmgard Flugge-Lotz]] developed the theory of [[bang-bang control|discontinuous automatic control]] and applied it to [[autopilot|automatic aircraft control systems]].
* [[Alexander Lyapunov]] in the 1890s marks the beginning of [[stability theory]].
* [[Harold Stephen Black|Harold S. Black]] invented the concept of [[negative feedback amplifier]]s in 1927. He managed to develop stable negative feedback amplifiers in the 1930s.
* [[Harry Nyquist]] developed the [[Nyquist stability criterion]] for feedback systems in the 1930s.
* [[Richard Bellman]] developed [[dynamic programming]] in the 1940s.<ref>{{cite magazine |author=Richard Bellman |date=1964 |title=Control Theory |doi=10.1038/scientificamerican0964-186 |magazine=[[Scientific American]] |volume=211 |issue=3 |pages=186–200|author-link=Richard Bellman }}</ref>
* [[Warren E. Dixon]], control theorist and a professor
* [[Kyriakos G. Vamvoudakis]], developed synchronous reinforcement learning algorithms to solve optimal control and game theoretic problems 
* [[Andrey Kolmogorov]] co-developed the [[Wiener filter|Wiener–Kolmogorov filter]] in 1941.
* [[Norbert Wiener]] co-developed the Wiener–Kolmogorov filter and coined the term [[cybernetics]] in the 1940s.
* [[John R. Ragazzini]] introduced [[digital control]] and the use of [[Z-transform]] in control theory (invented by Laplace) in the 1950s.
* [[Lev Pontryagin]] introduced the [[Pontryagin's minimum principle|maximum principle]] and the [[Bang-bang control|bang-bang principle]].
* [[Pierre-Louis Lions]]  developed [[viscosity solutions]] into stochastic control and [[optimal control]] methods.
* [[Rudolf E. Kálmán]]  pioneered the [[state-space]] approach to systems and control. Introduced the notions of [[controllability]] and [[observability]]. Developed the [[Kalman filter]] for linear estimation.
* [[Ali H. Nayfeh]]  who was one of the main contributors to nonlinear control theory and published many books on perturbation methods
* [[Jan Camiel Willems|Jan C. Willems]] Introduced the concept of dissipativity, as a generalization of [[Lyapunov function]] to input/state/output systems. The construction of the storage function, as the analogue of a Lyapunov function is called, led to the study of the [[linear matrix inequality]] (LMI) in control theory.  He pioneered the behavioral approach to mathematical systems theory.