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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 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

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

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 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

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 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

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 type … [Read more...] about AC Servomotor

Definition: A type of servomotor that uses DC electrical input to generate mechanical output like velocity, acceleration or position is known as DC servomotor. It is somewhat similar to a normal DC motor. However, there exist some differences between a normal dc motor and dc servomotor. Basically, DC servomotors of all types are required to be excited individually. This leads to provide linear characteristics between torque and speed. Introduction We have already discussed in our previous … [Read more...] about DC Servomotor

Servomotors are electrical devices used for converting electrical signal provided as input into a precise angular velocity. It is known as a servo system. Basically, a servo system is the one that generates some form of mechanical variable like velocity, acceleration or position as its output. A servomotor is designed to generate the mechanical equivalent of the applied electrical signal. It is known to be a low power motor that finds applications in servomechanisms or position control … [Read more...] about Servomotors