Whereas, MIMO (Multiple Inputs and Multiple Outputs) control systems have more than one input and more than one output. SISO (Single Input and Single Output) control systems have one input and one output. But, in discrete time control systems, there exists one or more discrete time signals.Ĭontrol Systems can be classified as SISO control systems and MIMO control systems based on the number of inputs and outputs present. In continuous time control systems, all the signals are continuous in time. Continuous time and Discrete-time Control SystemsĬontrol Systems can be classified as continuous time control systems and discrete time control systems based on the type of the signal used. Classification of Control Systemsīased on some parameters, we can classify the control systems into the following ways. So, the traffic lights control system operates on time basis. Accordingly, the input signal controls the output. Based on the traffic study at a particular junction, the on and off times of the lights can be determined. During this time, the other two lights will be off. Here, a sequence of input signal is applied to this control system and the output is one of the three lights that will be on for some duration of time. Traffic lights control system is an example of control system.
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In the next section on open loop and closed loop control systems, we will study in detail about the blocks inside the control system and how to vary this input in order to get the desired response.Įxamples − Traffic lights control system, washing machine We will vary this input with some mechanism.
Since, the output is controlled by varying input, the control system got this name. Here, the control system is represented by a single block. The following figure shows the simple block diagram of a control system.
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