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. |
