Contact Information: 
Ray W. Herrick Labs.
School of Mechanical Engineering
Purdue University
177 South Russell Street,
West Lafayette, IN 47907-2099, USA.

Telephone: +1 (765) 494-9274
Fax: +1 (765) 494-0787
Research Interests

Patricia Davies
Professor of Mechanical Engineering,
Director, Ray W. Herrick Laboratories.

Modeling, System Identification and Simulation of Linear and Nonlinear Systems 
Automotive systems and component behavior, e.g., polyurethane foam, car seats, seat-occupant systems. 
Nonlinear behavior of structures and materials and interactions between viscoelastic materials and structures: modeling, excitation for identifying model structure and for robust parameter estimation.
Prediction and simulation of interior and exterior noise and vibration, with applications to engines, ground and air vehicles, and buildings. 
Condition Monitoring of Machinery
Monitoring of component condition in machines, e.g., pumps, compressors, rotating machinery.

Perception-based Engineering (PBE) and Sound Quality (SQ)
PBE: Psychology and Engineering partnership of 15-20 faculty studying how people are affected by engineered products and systems, with the aim of optimizing machinery performance and effects on people.  Group studies a wide range of sensory input: sound, images, temperature and humidity, air-quality (smell), touch, and speech.
SQ: My contribution to the PBE research. Quantifying machinery noise signal characteristics that contribute to a person's perception of its sound quality. Developing tools for engineers to enable effective sound design of machinery. Applying psychoacoustics research to environmental noise and community impact assessment which includes sleep disturbance and annoyance.

Measurements and Signal Processing
Analysis of infant laughter to monitor developmental changes. 
Array techniques for noise source indentification.
Use of thin film sensors for real-time measurement of modal interactions.