Open Loop & closed Loop system with Practical скачать в хорошем качестве

Open Loop & closed Loop system with Practical

Difference between Open Loop and Closed Loop Control System A control system is defined as the mechanism or a system that provides the desired response or output by controlling the input and processing system. These days, control systems are being implementing in every smart devices and systems such as traffic lights system, washing machine, rocket launching systems, electrical power system, etc. Depending on the feedback path present in the system, the control systems can be classified into following two types, viz − Open Loop Control System Closed Loop Control System In this article, we will discuss all the major differences between open loop and closed loop control systems by considering various parameters such as basic definition, feedback path, complexity, cost, reliability, applications, etc. But, before discussing the differences, first we will know what the open loop and closed loop control systems are. What is an Open Loop Control System? An open loop control system is the one in which the output signal is not fed back to the input of the system. Therefore, an open loop control system is also referred to as a non-feedback control system. In case of open loop control system, the output has no control on the control action of the system. Thus, the open loop control system follows its input signals regardless of the final results. The block diagram of the open loop control system is shown in Figure-1. Here, the main components are: controller and plant (or processing system). The input is supplied to the controller which produces an actuating signal (or control signal). This actuating single is supplied to the plant or processing system which is to be controlled. The major disadvantage of an open loop control system is that it is poorly equipped to handle the disturbances which may reduce its ability to complete the desired task. Some common examples of open loop control system are: traffic light system, field controlled DC motor, automatic washing machine, immersion rod, etc. What is a Closed Loop Control System? A closed loop control system is the one in which the output signal is fed-back to the input of the system. Therefore, in a closed loop control system, the control action is a function of desired output signal. The main components of a closed loop control system are − controller, plant, error detector or comparator and feedback element which are connected together as shown in Figure-2. The error detector accepts input signal and feedback signal to produce an error signal which is the difference of input and feedback signals. The feedback signal is the sample of output of the overall system. Now, the error signal is supplied to the controller to produce an actuating signal which controls the plant or processing system to produce desired results. Therefore, in the closed loop control system, the input of the system is automatically adjusted to produce a desired response from the system. The common examples of closed loop control system are − air conditioner system, rocket launching system, radar tracking system, human respiratory system, etc. open loop and closed loop system, open loop and closed loop system in control system, open loop and closed loop system in hindi, open loop and closed loop control system in tamil, open loop and closed loop control system in telugu, open loop and closed loop hydraulic system, open loop and closed loop control system examples, open loop and closed loop control system difference, open loop and closed loop control system hydraulic, open loop and closed loop control system problems