# Control theory

User:Antonis - SYSOS
From SYSOS In 2000 I obtained an MA/MEng degree in Electrical and Information Sciences from the University of Cambridge, U.K., as a member of Robinson College. In 2005 I completed a PhD in Control and Dynamical Systems at the California Institute of Technology, with a PhD Minor in Aeronautics. My thesis was on "Scalable Analysis of Nonlinear Systems Using Convex Optimization".

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The concept of the feedback loop to control the dynamic behavior of the system: this is negative feedback, because the sensed value is subtracted from the desired value to create the error signal, which is amplified by the controller. The usual objective of a control theory is to calculate solutions for the proper corrective action from the controller that result in system stability, that is, the system will hold the set point and not oscillate around it. The inputs and outputs of a continuous control system are generally related by differential equations. If these are linear with constant coefficients, then a transfer function relating the input and output can be obtained by taking their Laplace transform.