Behavior Analysis with Sensors
Introduction
Control engineering is the engineering discipline that applies control theory to design, plan, and develop devices and systems with desired behaviors. The practice requires the use of input sensors and actuators to make modifications to the output response. Control engineering focuses mainly on the implementation of control systems based on mathematical modeling.
Since its origins, it has dealt with the automation and automatic control of industrial systems, without direct human intervention. Fields such as process control, control of electromechanical systems, supervision and adjustment of controllers and others where theories and techniques are applied, among which we can highlight: optimal control, predictive control, robust control and nonlinear control among others, all with very diverse works and applications (basic research, applied research, military, industrial, commercial, etc.), which have made control engineering an essential scientific and technological subject today.
History
Automatic control systems were first developed more than two thousand years ago. The first recorded feedback control device is believed to be the water clock of ancient Ctesibius in Alexandria, Egypt, around the century BC. C.[1] He kept time by regulating the level of water in a container and, therefore, the flow of water from that container. This was certainly a successful device as water clocks of similar design were still being manufactured in Baghdad when the Mongols captured the city in 1258 CE. A variety of automatic devices have been used over the centuries to perform useful tasks or simply to entertain. The latter includes automatons, popular in Europe in the 19th centuries, with dancing figures that repeated the same task over and over; These automata are examples of open loop control. Milestones among feedback, or "closed-loop" automatic control devices, include the temperature regulator of a furnace attributed to Drebbel"), around 1620, and the centrifugal ball controller used to regulate the speed of steam engines by James Watt in 1788.
In his 1868 article "On Governors", James Clerk Maxwell was able to explain the instabilities exhibited by the ball driver using differential equations to describe the control system. This demonstrated the importance and usefulness of mathematical models and methods for understanding complex phenomena, and marked the beginning of mathematical control and systems theory. Elements of control theory had appeared before, but not as spectacularly and convincingly as in Maxwell's analysis.