Back close

Course Detail

Course Name NVH and Refinement
Course Code 19MEE336
Program B. Tech. in Mechanical Engineering
Year Taught 2019

Syllabus

Unit 1

Introduction to Automotive NVH– Fundamentals of vibrations –Vibrations of Single degree of freedom , Multi degree of freedom and Continuous Systems – Vehicle vibration measurement and analysis –Vibration endurance test – Fundamentals of acoustics, Vehicle noise measurement, Data Acquisition Systems, Noise Standards, Types of Signals, Signal conditioning and processing, Analysis and presentation of data Ride Comfort – Sound Quality and psychoacoustics –Sound Quality Metrics Subjective–objective correlation –Squeak and rattle.

Unit 2

Fourier series – Fourier Integrals –- Discrete Fourier Transforms – Fourier and Laplace Transforms – Filters – Windowing – Uncertainty principle – Time Sampling and Aliasing – Random signal processing and analysis -Theory of modal analysis – Methods for performing modal analysis.

Unit 3

Vehicle NVH refinement –Vehicle Development process – target setting and Benchmarking– Simulation and Experimental techniques in NVH refinement – Refinement of Power train systems – Aerodynamic noise and its refinement – Mid– and high-frequency problems – Statistical Energy Analysis-Acoustic shielding and sound packages-Active noise control and their applications.

Objectives and Outcomes

Course Objectives

This course is expected to enable the student to:

  • Familiarize the fundamentals of Vibration and Acoustics.
  • Inculcate various methods of sound signal processing
  • Demonstrate various test methods to increase the NVH refinement levels

Course Outcomes

  • CO1: Understand fundamentals of Vibration and Acoustics
  • CO2: Model and analyze SDOF, MDOF and Continuous System
  • CO3: Comprehend vehicle noise and vibration measurement, data acquisition, signal processing and analysis, Fourier Series and their applications
  • CO4: Simulate and validate techniques in NVH & Refinement, Sound quality and their Metrics
  • CO5: Identify various sources of NVH in a vehicle, their control techniques
  • CO6: Analyze and identify measures for active Noise and Vibration Control

CO – PO Mapping

PO/PSO/
CO
PO1 PO2 PO3 PO4 PO5 PO6 PO7 PO8 PO9 PO10 PO11 PO12 PSO1 PSO2 PSO3
CO1 3 1 3 3 3 3
CO2 3 1 2 3 2 1
CO3 1 3 1 1 1 2
CO4 3 3 1 1 3 3
CO5 3 2 1 1 3 3 1
CO6 3 3 2 1 3

Textbook / Reference

Textbook / Reference Books

  • Xu Wang, “Vehicle Noise and Vibration Refinement”, CRC Press Publication, 2010.
  • J.M. KrodkiewskI, “Mechanical Vibration” Univ of Melbourne, 2008
  • Kihong Shin and Joseph K. Hammond “Fundamentals of Signal Processing for Sound andVibration Engineers”, John Wiley, 2008.

Evaluation Pattern

Assessment Internal External
Periodical 1 (P1) 15
Periodical 2 (P2) 15
*Continuous Assessment (CA) 20
End Semester 50
*CA – Can be Quizzes, Assignment, Projects, and Reports.

DISCLAIMER: The appearance of external links on this web site does not constitute endorsement by the School of Biotechnology/Amrita Vishwa Vidyapeetham or the information, products or services contained therein. For other than authorized activities, the Amrita Vishwa Vidyapeetham does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this web site.

Admissions Apply Now