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In the mid 1800's mathematics was first used to analyze the stability of feedback control systems.
The loom invented by Joseph Jacquard of France in 1801 is an early example of feedforward; a set of punched cards programmed the patterns woven by the loom; no information from the process was used to correct the machine’s operation.
In 1803 a pressure regulator was combined with a float regulator by Boulton and Watt for use in their steam engines.
In 1840, the British Astronomer Royal at Greenwich, G.B. Airy, developed a feedback device for pointing a telescope.
In his 1868 paper "On Governors", J. C. Maxwell (who discovered the Maxwell electromagnetic field equations) was able to explain instabilities exhibited by the flyball governor using differential equations to describe the control system.
J.C. Maxwell provided the first rigorous mathematical analysis of a feedback control system in 1868.
The Russian I.I. Vishnegradsky [1877] analyzed the stability of regulators using differential equations independently of Maxwell.
N. Minorsky [1922] introduced his three-term controller for the steering of ships, thereby becoming the first to use the proportional-integral-derivative (PID) controller.
Regeneration Theory for the design of stable amplifiers was developed by H. Nyquist [1932]. He derived his Nyquist stability criterion based on the polar plot of a complex function.
With the publication of "Theory of Servomechanisms" by H.L. Házen [1934], the use of mathematical control theory in such problems was initiated.
To study the control and information processing problems associated with the newly invented radar, the Radiation Laboratory was established at the Massachusetts Institute of Technology in 1940.
While working on an M.I.T./Sperry Corporation joint project in 1941, A.C. Hall recognized the deleterious effects of ignoring noise in control system design.
In 1947, N.B. Nichols developed his Nichols Chart for the design of feedback systems.
A summary of the M.I.T. Radiation Lab work is provided in Theory of Servomechanisms [James, Nichols, and Phillips, 1947].
Lauer, H., R.N. Lesnick, and L.E. Matdon, Servomechanism Fundamentals, New York: McGraw-Hill 1947.
The homeostasis of the body is maintained through the use of feedback control [Wiener 1948]. A primary contribution of C.R. Darwin during the last century was the theory that feedback over long time periods is responsible for the evolution of species.
Working at North American Aviation, W.R. Evans [1948] presented his root locus technique, which provided a direct way to determine the closed-loop pole locations in the s-plane.
In 1948, Ivachenko had investigated the principle of relay control, where the control signal is switched discontinuously between discrete values.
In 1950, Sperry Rand built the first commercial data processing machine, the UNIVAC I. Soon after, IBM marketed the 701 computer.
The work of C.E. Shannon in the 1950's at Bell Labs had revealed the importance of sampled data techniques in the processing of signals.
October 1954: 60, 30 and 15 years ago in Control Engineering
More from April 1955: Keep the right kind of records to protect your patentable ideas
Tsypkin used the phase plane for nonlinear controls design in 1955.
Given the history of control theory in the Soviet Union, it is only natural that the first satellite, Sputnik, was launched there in 1957.
Ragazzini, J.R., and G.F. Franklin, Sampled-Data Control Systems, New York: McGraw-Hill, 1958.
The first industrial computer control system used in a factory was assembled in 1959 at Texaco’s Port Arthur, Texas refinery.
The first conference of the newly formed International Federation of Automatic Control (IFAC) was fittingly held in Moscow in 1960.
In 1960 three major papers were published by R. Kalman and coworkers, working in the United States One of these [Kalman and Bertram 1960], publicized the vital work of Lyapunov in the time-domain control of nonlinear systems.
In 1960 a major advance occurred- the second generation of computers was introduced which used solid-state technology.
Without computers, modern control would have had limited applications. It is fortunate that in 1960 there were major developments in another area- digital computer technology.
By now, automatic control theory using frequency-domain techniques had come of age, establishing itself as a paradigm (in the sense of Kuhn [1962]). On the one hand, a firm mathematical theory for servomechanisms had been established, and on the other, engineering design techniques were provided.
The Ramo-Wooldridge Company created additional advanced process control computers but got out of the commercial marketing of computers about the same time as they changed their name to TRW Inc. in 1965.
Hall, A.C., "Application of Circuit Theory to the Design of Servomechanisms," J. Franklin Inst., 1966.
After entries from DEC, Allen Bradley and Bedford Associates were presented to GM, Bedford Associates, won out with its Modicon 084 programmable controller (PC) in 1969.
With the advent of the microprocessor in 1969 a new area developed.
By 1970, with the work of K. Åström [1970] and others, the importance of digital controls in process applications was firmly established.
A major proponent of classical techniques for multivariable systems was I. Horowitz, whose quantitative feedback theory developed in the early 1970's accomplishes robust design using the Nichols chart.
Dick Morley and his team of engineers at Bedford ended up creating a new subsidiary at Bedford Associates called Modicon as a result of their success with the 084 in 1973 which addressed a lot of additional needs of the marketplace.
With the work on robust modern control in the early 1980's, there is now a technique (LQG/LTR, Chapter 10) for designing robust multivariable control systems.
Allen-Bradley was purchased by Rockwell Automation in 1985 yet their products and software still wear the Allen-Bradley name.
ICON eventually was purchased by Rockwell Automation in 1993 and Taylor Industrial Software was sold eventually to GE Fanuc.
September 2004: 50, 25, and 10 years ago in Control Engineering Stop coining words; single-chip analog and digital signal processor; giants, machine control, and perspective
See Control Engineering 2005 media kit, page 4 at /mediainfo.
The negative growth as a result of the ushering-in of the Great Recession of 2008 has brought about much stagnation over the last several years in the world of industrial automation.
CFE Media forms in 2010 – Welcome Back To CFE Media, Consulting-Specifying Engineer, Control Engineering, Plant Engineering
CFE Media Launches ContentStream in 2012
Monthly histories: 60, 30, and 15 years ago (from the 60th anniversary in 2014
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