Previously we have discussed that Bode Plot is a graphical representation that expresses response of the system using the logarithmic scale. In Bode plot logarithmic of magnitude and logarithmic of phase angle is plotted against logarithmic of frequency. In the previous article, we have seen what a bode plot is and discussed the standard factors. Here in this article, we will see how the bode plot is sketched and later will explain the same with the help of an example. Steps to Construct … [Read more...] about Bode Plot Construction with Example

## Bode Plot

Definition: Bode Plot is a graphical method used for design and analysis purpose of the control system. In the Bode Plot, a logarithmic scale is used that helps in simplifying the way to graphically represent the frequency response of the system. The idea of logarithmic scaling was provided by Hendrick W. Bode. In bode plot, logarithmic of magnitude and logarithmic of phase angle are separately plotted for logarithmic values of frequencies. Need for Bode Plot Previously we have seen that … [Read more...] about Bode Plot

## Polar Plot

Definition: The plot that represents the transfer function of the system G(jω) on a complex plane, constructed in polar coordinates is known as Polar Plot. The polar plot representation shows the plot of magnitude versus phase angle on polar coordinates with variation in ω from 0 to ∞. It is used for stability analysis. Construction of Polar Plot It is known to us that plotting frequency response signifies sketching the variations in the magnitude and phase angle with respect to the input … [Read more...] about Polar Plot

## Root Locus Construction with Examples

Root Locus is a way of determining the stability of a control system. In the previous article, we have discussed the root locus technique that tells about the rules that are followed for constructing the root locus. Here in this article, we will see some examples regarding the construction of root locus. But before going these solved examples you must have the basic idea about the rules for constructing the root locus. So, first, go through the article root locus technique. Before … [Read more...] about Root Locus Construction with Examples

## Root Locus Technique

In the previous article, we have discussed the basics of root locus. Basically, the root locus technique or plot is a way of constructing root locus that involves some rules as it helps in determining the stability of the control system. We have discussed that the graph formed by plotting the path of the roots of the characteristic equation obtained for various values of K is root locus. This simply helps in determining the values of K that satisfies the complete performance of the system … [Read more...] about Root Locus Technique

## Root Locus in Control System

A graphical method used for analyzing the location and movement of poles in the s-plane with the variation in the gain factor of the system is known as Root Locus. This technique is used to check the stability of the closed-loop control system. So, in simple terms, a graph plotted for roots of a characteristic equation by varying the system parameter (generally gain) from 0 to infinity is called Root Locus. Root Locus Analysis was proposed by W R Evans in the year … [Read more...] about Root Locus in Control System

## Liquid Level Control System

Liquid Level Control System is a system specifically designed to control the level of fluid in tanks. The main aim possessed by these systems is to control the rate with which the pump delivers fluid to the tank and so it can reach the desired level inside the tank. The purpose of the liquid level system is to maintain a specific level of fluid inside the tank. The liquid level control systems find major applications in industrial processes. Introduction In our previous article, we have … [Read more...] about Liquid Level Control System

## Pneumatic Actuator

Definition: The actuators that are designed to operate on compressible fluid generally air, is known as Pneumatic Actuator. The Pneumatic actuators use the pressurized air as input and change it into mechanical motion. More specifically, pneumatic actuators are devices that change the pressure obtained by compressing the air into mechanical energy. Introduction We know that actuators are the devices employed in the control system that acts on the control signal received from the controller … [Read more...] about Pneumatic Actuator

## Hydraulic Actuator

Hydraulic Actuator is the type of actuator that utilizes the hydraulic pressure as input in order to provide excitation to the plant (controlled process) of the control system. The controller provides the control signal to the actuator that hydraulically applies the equivalent signal to the plant in order to have the desired output in controlled operations. The hydraulic systems possess an operating pressure range between 1 to 35 Mega Pascals. These are widely used in closed-loop control … [Read more...] about Hydraulic Actuator

## AC Servomotor

A type of servomotor that uses AC electrical input in order to produce mechanical output in the form of precise angular velocity is known as AC servo motor. AC servomotors are basically two-phase induction motors with certain exceptions in designing features. The output power achieved from ac servomotor ranges between some watt to a few hundred watts. While the operating frequency range is between 50 to 400 Hz. It provides closed-loop control to the feedback system as here the use of a … [Read more...] about AC Servomotor