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Introduction to Control Systems
Transcript of Introduction to Control Systems
Control Systems Concern with the understanding and control of segments of the
environment to provide useful
and economical products History of
Control Systems The first application of feedback control by the Greeks in 300 BC in the development of
float regulators. An automatic valve whose opening and closing are controlled by a float at the end of a lever First feedback system in modern Europe was the temperature regulator by Cornelius Drebbel (1572 - 1633) in Holland. invented the first submarine First automatic feedback controller used in industrial process was the flyball governor by James Watt (1769) Centrifugal Governor or Flyball Governor controls the speed of the engine by regulating the amount of fuel First feedback system claimed by Russia is the water float regulator by I. Polzunov. (1765) He also created Russia's first steam engine. JC Maxwell formulated the mathematical model for a governor control of a steam engine (1868) His most prominent
achievement was formulating
classical electromagnetic theory. Henry Ford developed mechanized assembly machine for car manufacture (1913) H.W. Bode analyzes feedback amplifiers (1927) A pioneer of modern control theory and electronic telecommunications he revolutionized both the content and methodology of his chosen fields of research. An amplifier which combines a fraction of the output with the input so that a negative feedback opposes the original signal. H. Nyquist analyzes the stability of systems (1932) The Nyquist stability criterion, named after Harry Nyquist, is a graphical technique for determining the stability of a system. First Industrial robot called UNIMATE design by George Devol. (1954) State variable models and optimal control was developed (1970) A state variable is one of the set of variables that are used to describe the mathematical "state" of a dynamical system. Optimal control theory, an extension of the calculus of variations, is a mathematical optimization method for deriving control policies. Robust control design gained popularity (1980) Feedback control using reliable and robust system used in manufacturing (1994)