Control theory | Wikipedia audio article
Channel: wikipedia tts
Date: 25/12/2018

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Control_theory


00:02:15 1 History
00:04:29 2 Open-loop and closed-loop (feedback) control
00:06:30 2.1 Other examples
00:08:28 3 Classical control theory
00:09:56 4 Closed-loop transfer function
00:13:51 5 PID feedback control
00:23:00 6 Linear and nonlinear control theory
00:24:56 7 Analysis techniques - frequency domain and time domain
00:27:32 8 System interfacing - SISO &amp; MIMO
00:28:40 9 Topics in control theory
00:28:50 9.1 Stability
00:33:44 9.2 Controllability and observability
00:35:35 9.3 Control specification
00:37:18 9.4 Model identification and robustness
00:41:00 10 System classifications
00:41:10 10.1 Linear systems control
00:41:47 10.2 Nonlinear systems control
00:42:45 10.3 Decentralized systems control
00:43:16 10.4 Deterministic and stochastic systems control
00:43:40 11 Main control strategies
00:47:35 12 People in systems and control
00:49:58 13 See also



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SUMMARY
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Control theory in control systems engineering is a subfield of mathematics that deals with the control of continuously operating dynamical systems  in engineered processes and machines. The objective is to develop a control model for controlling such systems using a control action in an optimum manner without delay or overshoot and ensuring control stability.
To do this, a controller with the requisite corrective behaviour is required. This controller monitors the controlled process variable (PV), and compares it with the reference or set point (SP). The difference between actual and desired value of the process variable, called the error signal, or SP-PV error, is applied as feedback to generate a control action to bring the controlled process variable to the same value as the set point. Other aspects which are also studied are  controllability and observability. On this is based the advanced type of automation that revolutionized manufacturing, aircraft, communications and other industries. This is feedback control, which is usually continuous and involves taking measurements using a sensor and making calculated adjustments to keep the measured variable within a set range by means of a "final control element", such as a control valve.Extensive use is usually made of a diagrammatic style known as the block diagram. In it the transfer function, also known as the system function or network function, is a mathematical model of the relation between the input and output based on the differential equations describing the system.
Control theory dates from the 19th century, when the theoretical basis for the operation of governors was first described by James Clerk Maxwell.  Control theory was further advanced by Edward Routh in 1874, Charles Sturm and in 1895, Adolf Hurwitz, who all contributed to the establishment of control stability criteria; and from 1922 onwards, the development of PID control theory by Nicolas Minorsky.
Although a major application of control theory is in control systems engineering, which deals with the design of process control systems for industry, other applications range far beyond this.  As the general theory of feedback systems, control theory is useful wherever feedback occurs.