By : Vandana Tanwar
Updated : Feb 4, 2021, 12:44
A basic control system converts an input into the desired output. There are various types of classifications of the control system — continuous-time and discrete-time systems and SISO (Single Input-Single Output) and MIMO (Multiple Inputs and Multiple Outputs) systems. This topic is of immense importance in the GATR ECE, Engineering Services Exam (ESE), GATE, and ISRO examinations. The Basics of Control Systems for Computer Science prepare the students for future jobs.
The Basics of Control System syllabus for GATE contains topics like block diagrams and their description, open and closed-loop systems, stability analysis, frequency response, Root Loci, Bode and Nyquist plots, and other such tools.
The following are some of the Basics of Control System topics that a GATE aspirant must prioritize while prepping for the exam:
Open- Loop control system
This system has a controller or actuator for getting the desired output. There is no feedback system for error detection.
Closed-Loop Control system
The actual output, in this case, is compared to the desired output using an additional measure.
Feedback & Frequency Response
Feedback control systems work in closed-loop systems where parameters of the output are used for controlling the input. There are two types of feedback – positive and negative.
Block Diagram Reduction
By rearrangement, one can simplify complex block diagrams to help evaluate the performance of the system.
Maeson's Gain Formula
The formula is used for drawing a block diagram using forward paths, feedback loops, path gain, loop gain, the source node, and the sink node.
The electrical and mechanical analogous systems have the same form but differential equations. Learn two essential topics in the Basics of Control System GATE syllabus: Force-Current F-I and F-V Analogy
Compensation and Controllers
Compensation is the method used for modifying the control system to improve its performance. It is done using a Compensator. Controllers are used for maintaining controlled variables at specific values.
Nyquist Stability Criteria & Analysis
Nyquist criterion comes into play to identify roots in a characteristic equation of the system in s-plane.
Here are some tips and tricks that you can use while solving Basics of Control System questions:
Let’s see why Basics of Control System is an important topic in GATE and other competitive exams:
For GATE and other competitive exams, it is crucial to be well-prepared on this topic. Here is the recommended list for best books on and Basics of Control System GATE notes.
Name of The Book
Name of the Author
Modern Control Engineering
Linear Control Systems
Automatic Control Systems
Benjamin C. Kuo
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Q. How much time should I allot to prepare for the preparation of the Basics of Control topic?
You must assign at least a couple of days to prepare for this topic. If you are good at solving problems, you will take lesser time than those who struggle with solving problem sums.
Q. A car moves at a uniform speed of 60 km/hr. What is the feedback element for the driver?
The needle on the speedometer is the feedback element for him.
Q. What is a Stochastic Control System?
It is a control system that works under unknown and random action
Q. What are Resolvers?
A Resolver is a device that helps detect errors in instruments
Q. How can an unstable system be made stable?
By increasing the system's gain, you can convert an unstable system into a stable system.