The controller which is highly sensitive to noise is 

This question was previously asked in
ESE Electronics 2016 Paper II: Official Paper
View all UPSC IES Papers >
  1. PI
  2. PD
  3. Both PI and PD
  4. Neither PI nor PD

Answer (Detailed Solution Below)

Option 2 : PD
Free
ST 1: UPSC ESE (IES) Civil - Building Materials
6.4 K Users
20 Questions 40 Marks 24 Mins

Detailed Solution

Download Solution PDF

Proportional + Derivate:

Electronics Janesh Assignment 4 9Q S shubham D2

The additive combination of proportional & Derivative control is known as P-D control.

The overall transfer function for a PD controller is given by:

\({G_C}\left( s \right) = \frac{{U\left( s \right)}}{{E\left( s \right)}} = {K_P} + s{K_D}\)

PD controller is nothing but a differentiator (or) a High Pass Filter.

The frequency of noise is very high. So this high pass filter will allow noise into the system which results in noise amplification.

Hence option 2 is correct. 

26 June 1

Effects of Proportional Derivative (PD) controllers:

  • Decreases the type of the system by one
  • Reduces the rise time and settling time
  • Rise time and settling time decreases and Bandwidth increases
  • The speed of response is increased i.e. the transient response is improved
  • Improves gain margin, phase margin, and resonant peak
  • Increases the input noise
  • Improves the stability

 

Effects of Proportional Integral (PI) controllers:

  • Increases the type of the system by one
  • Rise time and settling time increase and Bandwidth decreases
  • The speed of response decreased i.e. transient response becomes slower
  • Decreases the steady-state error and steady-state response is improved
  • Decreases the stability
Latest UPSC IES Updates

Last updated on Jul 2, 2025

-> ESE Mains 2025 exam date has been released. As per the schedule, UPSC IES Mains exam 2025 will be conducted on August 10. 

-> UPSC ESE result 2025 has been released. Candidates can download the ESE prelims result PDF from here.

->  UPSC ESE admit card 2025 for the prelims exam has been released. 

-> The UPSC IES Prelims 2025 will be held on 8th June 2025.

-> The selection process includes a Prelims and a Mains Examination, followed by a Personality Test/Interview.

-> Candidates should attempt the UPSC IES mock tests to increase their efficiency. The UPSC IES previous year papers can be downloaded here.

More Controllers Questions

More Controllers and Compensators Questions

Get Free Access Now
Hot Links: all teen patti master teen patti star login teen patti dhani