Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

King, Roger L.

Committee Member

Qatu, Mohamad

Committee Member

Walden, Clayton T.

Committee Member

Banicescu, Ioana

Committee Member

Hammi, Youssef

Date of Degree

8-17-2013

Document Type

Dissertation - Open Access

Major

Computational Engineering (program)

Degree Name

Doctor of Philosophy

College

James Worth Bagley College of Engineering

Department

Computational Engineering Program

Abstract

Variation in vehicle noise, vibration and harshness (NVH) response can be caused by variability in design (e.g. tolerance), material, manufacturing, or other sources of variation. Such variation in the vehicle response causes a higher percentage of produced vehicles to have higher levels (out of specifications) of NVH leading to higher number of warranty claims and loss of customer satisfaction, which are proven costly. Measures must be taken to ensure less warranty claims and higher levels of customer satisfactions. As a result, original equipment manufacturers (OEMs) have implemented design for variation in the design process to secure an acceptable (or within specification) response. The focus here will be on aspects of design variations that should be considered in the design process of drivelines. Variations due to imbalance in rotating components can be unavoidable or costly to control. Some of the major components in the vehicle that are known to have imbalance and traditionally cause NVH issues and concerns include the crankshaft, the drivetrain components (transmission, driveline, half shafts, etc.), and wheels. The purpose is to assess NVH as a result of driveline imbalance variations and develop a tool to help design a more robust system to such variations.

URI

https://hdl.handle.net/11668/21063

Comments

program.||Java||quality engineering||quality||capability studies||manufacturing processes||manufacturing engineer||design engineer||sales||profit||customer concern||warranty||objectionable||Eigen functions||vectors||Eigen||Eigen values||identity||Euler||differential equations||differential||transfer case||shaft||driveline||static imbalance||dynamic imbalance||passenger||customer||driver inboard ear||driver outboard ear||steering wheel||seat track||variation||Gamma distribution||normal distribution||standard deviation||average||variance||mean||phasor||victor||scalar||linear system||LTI||linear time invariant||transfer function||output||input||microphone||accelerometers||tachometer||channels||order||frequency||frequency domain||time domain||convolution||Transformation||Fourier Transformer||Fourier||imaginary and real||logarithmic||decibel||sensitivity curves||run down||run up||two wheel drive||Four Wheel Drive||Nissan||Truck||OEM||Original Equipment Manufacturers||Data Acquisitions||Channels||Simulation||Six Sigma||variability||Design||Robust||sensitivity||Vibration||Imbalance||Noise||Harshness||NVH||Driveline

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