JOHN D. HEDENGREN
john_hedengren@hotmail.com
Objective Implement advanced process control by creating first principles models
and applying those models in real-time optimal estimation and control
Areas of
Competence Development
of dynamic first-principles models for chemical engineering applications:
polypropylene and polystyrene reactors, distillation columns, combustion, and
nuclear applications.
Commissioning
of advanced process control applications
Development
of innovative algorithms and software for state estimation and control
Education The
PhD in Chemical Engineering, May
2005
GPA
4.0
BS and MS in Chemical Engineering, Aug. 2002
GPA: 3.95
Related
Experience PAS, Inc., Advanced Process Control
Development May 2005-Current
Developed first principles models for homopolymer and impact polypropylene reactors
Conducted
APC training seminars for internal and external clients
Commissioned
3 Unipol reactor APC applications as lead technical
engineer
Advanced Process
Control Research (UT
Created an object oriented first principles modeling
simulation environment
Developed
methods to significantly reduce nonlinear MPC computational time
Explored
large-scale model reduction
Developed
real-time advanced control strategies of large-scale first principles models
ExxonMobil,
Developed advanced process control for polymer
production
Worked
with plant operators and technical specialists to develop a model
Trained
other PhD engineers to use advance control technology
Rocket Propellant Combustion Modeling
(BYU MS) May 2001-Aug. 2002
Explored
‘time to detonation’ of a rocket motor in a pool fire
Improved speed of gaseous HMX reaction calculations by
10 times
CH2MHill
Internship,
Determined pipe flushing requirements for radioactive
waste
Worked
on a team to maintain liquid pumping from radioactive waste tanks
BNFL Inc. Internship,
Performed design work for vitrification (molten glass
encapsulation)
Analyzed
corrosion for all major plant vessels handling radioactive sludge
Prepared
reports for the US Department of Ecology and other clients
BYU DIPPR
Thermophysical Properties Lab April 1999-June 1999
Predicted surface tensions for over 700 compounds
Verified
predicted values with experimental data
Other
Experience Boy Scouts of
Led 10 and 11 year old boys on campouts, rank
advancement, and weekly meetings
Facilitated
the transition from the Cub Scout to the Boy Scout organization
Created
web-based content to encourage planning and coordination of parents
Volunteer Representative in
Served as missionary for The Church of Jesus Christ of
Latter-day Saints
Coordinated
efforts of sixteen representatives as zone leader
Learned
to read, write, and speak Italian fluently
Skills Computer
Skills:
Linux and Windows
CHEMKIN, PAS Polymer dynamic modeling
software (PDMS)
Microsoft
Office: Word, Excel, Access, VBA
Matlab, FORTRAN, Java, HTML, Visual Basic, and C/C++ programming languages
Activities National champion 10,000-meter Road Runner’s Club of America, 2006
National
champion 10,000-meter and runner up 5,000-meter - USA Junior Nationals
Mountain West Conference Champion for Cross-Country
Running
Honors Thrust 2000 Fellowship Recipient, 2002-2004
NCAA
All-American in Cross-Country, 2000
Verizon Academic All-American, 1st Team
GTE
Academic All-American, 2nd Team
Team
Captain for BYU Cross Country Team
Marigold
S. Saunders Academic Scholarship Recipient
BYU
Dean’s List
Boy
Scouts of
Peer Reviewed Publications
Hedengren,
J. D. and Edgar, T. F., Approximate Nonlinear Model Predictive Control with In
Situ Adaptive Tabulation, Industrial & Engineering Chemistry Research,
submitted 2006.
Hedengren,
J. D., Edgar, T. F., and J. B. Rawlings, Moving Horizon Estimation - The
Explicit Solution, Proceedings of CPC-VII,
Hedengren, J. D. and Edgar, T. F., In Situ Adaptive
Tabulation for Real-Time Control, Industrial & Engineering Chemistry
Research, 44 (8), pp. 2716 -2724, 2005.
Hedengren,
J. D. and Edgar, T. F., Order Reduction of Large Scale DAE Models, Computers
& Chemical Engineering, 29 (10), pp. 2069-2077, 2005.
Other Publications
Hedengren,
J.D. and Edgar, T.F., Order Reduction of a Large-Scale Index-2 DAE Model, , Computing and Systems Technology Division, AIChE National Meeting,
Hedengren,
J. D. and Edgar, T. F., Efficient Moving Horizon Estimation of DAE Systems,
Texas-Wisconsin Modeling and Control Consortium (TWMCC),
Hedengren,
J. D. and Edgar, T. F., Adaptive DAE Model Reduction, Texas-Wisconsin Modeling
and Control Consortium (TWMCC),
Hedengren,
J. D. and Edgar, T. F., Order Reduction of Large Scale DAE Models, Computing
and Systems Technology Division, AIChE National Meeting,
Austin, TX, Nov 2004.
Hedengren,
J. D. and Edgar, T. F., In Situ Adaptive Tabulation for Real-time Control,
Proceedings of the American Control Conference (ACC), Boston, MA, July 2004.
Hedengren,
J. D. and Edgar, T. F., Dependency Analysis for DAE to ODE Conversion and Model
Reduction, Texas-Wisconsin Modeling and Control Consortium (TWMCC),
Hedengren,
J. D. and Edgar, T. F., In Situ Adaptive Tabulation for Nonlinear MPC, Poster
Session: Systems and Process Control, AIChE National
Meeting,
Hedengren,
J. D. and Edgar, T. F., In Situ Adaptive Tabulation for Nonlinear MPC,
Texas-Wisconsin Modeling and Control Consortium (TWMCC),
Teaching Experience
Co-instructor for Upper-Division ChemE Process Control Course, Fall 2003, UT
Overall Instructor Rating: 4.0/5.0
Overall Course Rating: 3.9/5.0
Course
well-organized: 4.4/5.0
Communicated
information effectively: 4.3/5.0
Showed
interest in student progress: 4.4/5.0
Assignments
and tests returned promptly: 4.4/5.0
Student
freedom of expression: 4.4/5.0
Course
of value to date: 4.2/5.0
Student
comments on review forms
“John
was excellent during office hrs – always willing to help! Liked the Simulink/Matlab in class.”
“Thank
you for helping us with homework. I
think it really helped me with understanding the materials for this
course. Thank you again for all of your
time and patience.”
“I
think you’re the most helpful TA I have ever had; you did a wonderful job of
explaining & taking an interest in the student.”
Teaching Assistant for Upper-Division ChemE Process Control Course, Spring 2005, UT
Overall Teaching Assistant Rating: 4.1/5.0
TA available for scheduled office hours:
3.8/5.0
TA knowledgeable about subject material:
4.4/5.0
TA interested in subject matter: 4.5/5.0
TA explained material clearly: 4.3/5.0
TA kind and respectful: 4.5/5.0
TA patient with questions: 4.3/5.0
TA receptive to questions: 4.3/5.0
TA gave helpful feedback on assignments:
4.1/5.0
Student
comments on review forms
“Thanks
for the donkey cart process control problem. .
.something to remember ChE360 by.”
“John
was available more than required & tried to explain things in a way that
everyone could understand.”
“Good,
very knowledgeable”
“Excellent teaching, thorough, funny. Very valuable teaching/learning experience.”