Abstract
Digital control systems are described by digital control theory. Some necessary fundamental knowledge on digital control theory is introduced in this chapter as mathematical tools. As computers operate on digital signals, the need for handling digital signals increased proportionally. High-speed processing capabilities of modern computers attracted applications that make use of digital signals, which further accelerate the development of the use of digital signals. Therefore, digital control systems have gradually become more prominent in today's industries. Digital control systems have many advantages over analog control systems. Digital control systems are smaller in size and consume less power than their analog control counterparts. Digital control systems are also highly reproducible and have virtually unlimited programmability. The greatest advantage of digital technology is the flexibility that allows modification to be done. Digital computers are used for simulation and computation of control systems dynamics for analysis and design of complex control-systems. It eased the hassle of laboratory work that is tedious and expensive. Computer simulations also allow the designers to check or present the results obtained by analytical means. In addition, digital computers can also be used as controllers or processors.
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