Pid controller bp ganthia
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This document discusses PID controllers and their applications. It begins by introducing control systems and controller classifications. It then describes the three components of a PID controller - proportional, integral and derivative - and explains that PID controllers combine these three components. Finally, it states that PID controllers are commonly used in industrial control applications to regulate variables like temperature, flow and pressure due to their accuracy and stability.
Pid controller bp ganthia
- 1. Control System: PID Controller PRESENTED BY Bibhu Prasad Ganthia
- 2. CONTENT • Introduction • Controller Classification • PID Controller • Applications
- 3. INTRODUCTION A control system manages, commands, directs, or regulates the behavior of other devices or systems using control loops.
- 4. CONTROLLER • A controller is a mechanism that seeks to minimize the difference between the actual value of a system (i.e. the process variable) and the desired value of the system (i.e. the set point). Controllers are a fundamental part of control system engineering and used in all complex control systems.
- 5. Before we introduce you to various controllers in detail, it is very essential to know the uses of controllers in the theory of control systems. The important uses of the controllers include: •Controllers improve the steady-state accuracy by decreasing the steady state error. •As the steady-state accuracy improves, the stability also improves. •Controllers also help in reducing the unwanted offsets produced by the system. •Controllers can control the maximum overshoot of the system. •Controllers can help in reducing the noise signals produced by the system. •Controllers can help to speed up the slow response of an over damped system. The main feature of continuous controllers is that the controlled variable (also known as the manipulated variable) can have any value within the controller’s output range. Now in the continuous controller theory, there are three basic modes on which the whole control action takes place, which are: •Proportional controllers. •Integral controllers. •Derivative controllers. We use the combination of these modes to control our system such that the process variable is equal to the set point (or as close as we can get it). These three types of controllers can be combined into new controllers: •Proportional and integral controllers (PI Controller) •Proportional and derivative controllers (PD Controller) •Proportional integral derivative control (PID Controller)
- 6. PID CONTROLLER Proportional plus Integral plus Derivative Controller (PID Controller): A PID controller is generally used in industrial control applications to regulate temperature, flow, pressure, speed, and other process variables.
- 7. The transfer function of the PID Controller can be found as: It can be observed that one pole at origin is fixed, remaining parameters Td, K, and Ki decide the position of two zeros. In this case, we can keep two complex zeros or two real zeros as per the requirement, hence PID controller can provide better tuning. In the olden days, the PI controller was one of the best choice of control engineers, because designing (tuning of parameters) of the PID controller was a little difficult, but nowadays, due to the development of software designing of PID controllers have become an easy task.
- 9. APPLICATION PID (proportional integral derivative) controllers use a control loop feedback mechanism to control process variables and are the most accurate and stable controller. A PID controller is an instrument used in industrial control applications to satellite communications, missile launching, regulate temperature, flow, pressure, speed and other process variables.