# Chiu H Choi

Professor

Electrical Engineering • College of Computing, Engineering & Construction

## Areas of Expertise

computational algorithms for controls

microcontroller-based system design

control theory

## Education

Ph.D., Electrical and Computer Engineering

University of California, Santa Barbara

Emphasis: Control Systems

M.S., Electrical and Computer Engineering

University of California, Santa Barbara

Emphasis: Signals and Systems

B.S., Electrical Engineering

University of Hong Kong

## Biography

Dr. Choi is a Professor of Electrical Engineering at the University of North Florida. He has keen interest in engineering education and has continually producing scholarly publications. Dr. Choi has taught a wide spectrum of courses in the areas of microcontroller applications, control system design, electromagnetics, circuit analysis, electronics, signals and systems, senior design projects, and others. His work in engineering education has been published regularly and presented in first-tier engineering education conferences. He has received several teaching awards and was listed in the 2003-2004 Who's Who Among American Teachers. Dr. Choi's research interests include computational algorithms for controls and microcontroller-based system design. His current research projects include the development of stable computational techniques for solving state-space control problems and embedded control systems. Dr. Choi holds a current and active Professional Engineer license (Florida). Dr. Choi worked as an engineer in China for a number of years.

## Awards

Professor of the Year, 2010, awarded by the Northeast Florida engineering societies.

## Grants and Contracts Awarded

Recent activities in the past three years:

The Omnii Sense project, $10K funded by MegaWatt Ventures Competition, sponsored by the U.S. Department of Energy, 2011-2012. The PI's were Jerry Merckel and Chiu Choi.

Co-PI of a project titled “Sensor Arrays for Multiple Applications” funded by the U.S. Army. The project was proposed by the UNF Sensors Group that received a funding of 1.4 million in the period from 2009-2010.

Received a UNF summer undergraduate teaching grant in 2009. The total amount was $7,500. The outcome of the grant was a website of embedded reference designs covering sensors, motors, motor drivers, LCD displays, keypad interfaces, and other embedded electronic circuits. This project was completed in fall 2009.

## Publications & Presentations

Chiu Choi, “Contributions to Computational Algorithms For Stiff Lyapunov Differential Equations,” Journal of Electronic Engineering, i-Manager Publications, pp. 1-10, 2012.

Arnold Cassell and Chiu Choi, “Genetic Approach to Pole Placement in Linear State Space Systems,” Proceedings of the 44th IEEE Southeastern Symposium on System Theory, pp. 24-29, 2012.

Chiu Choi, “Reference Designs For Sensors Used In Microcontroller-Based Design Projects,” Proceedings of the 2011 American Society for Engineering Education Annual Conference, June 2011.

Chiu Choi, “Reference Designs for Embedded Controls,” Proceedings of the 2011 Frontiers in Education Conference, October 2011.

Chiu H. Choi, “Effect of observer poles on step responses,” Proceedings of the 42nd IEEE Southeastern Symposium on System Theory, Tyler, TX, March 2010.

Chiu H. Choi, “A Linear Control Systems Course with Emphasis on Embedded Control,” Proceedings of the 2010 American Society for Engineering Education Annual Conference, Louisville , KY, June, 2010.

Chiu H. Choi, “Computational Method for Medium Scale Stiff Lyapunov Differential Equations,” Proceedings of the 2009 Asian Control Conference in Hong Kong, China, August 2009.

Chiu H. Choi, “Improving Step Responses by Pole Placement using Reduced-order Observers,” Proceedings of the 41st IEEE Southeastern Symposium on System Theory, Tullahoma, TN, March 2009.

Chiu H. Choi, “Comparing the Accuracy of Backward Differentiation Formulas for Solving Lyapunov Differential Equations,” Proceedings of the 2008 IEEE Multi-conference on Systems and Control, Sep. 2008, San Antonio, Texas.

Chiu H. Choi, “Step Response Improvement by Pole Placement with Observer,” Proceedings of the 40th Southeastern Symposium on System Theory, pp.7-12, Mar. 2008, University of New Orleans, New Orleans, LA.

Chiu H. Choi, “A Laboratory-Oriented Microcontroller Applications Course and Freescale’s Microcontroller Experimentation Kit,” Proceedings of the 2008 American Society for Engineering Education Annual Conference, Pittsburgh, Penn, June 2008.

David Evanko, Arend Dorsett, and Chiu H. Choi, “A Ball-on-Beam System with an Embedded Controller,” Proceedings of the 2008 American Society for Engineering Education Zone I Conference, Mar. 2008, U.S. Military Academy, West Point, N.Y.

Chiu H. Choi, “Design of Compensators for Meeting the Specification of Peak Value,” Proceedings of the 39th Southeastern Symposium on System Theory, pp.76-79, March 2007, Mercer University, Macon, GA.

K. Dancs, T. Nguyen,V. Gadzic,T. Dao, and Chiu H. Choi, “A Vehicle Drivable by a Laptop PC,” Proceedings of the 2006 American Society for Engineering Education Annual Conference, June 2006, Chicago, IL.

Chiu H. Choi, “Applications of Embedded Controllers in Speed and Position Controls,” Proceedings of the 2005 IEEE International Conference on Industrial Electronics and Control Applications, Nov. 2005, Quito, Ecuador.

Chiu H. Choi, “Controller Design- One Op. Amp. Solutions,” Proceedings of the 37th Southeastern Symposium on System Theory, pp. 30-34, Mar. 2005, Tuskegee University, Tuskegee, AL.

Chiu H. Choi, “Undergraduate Controls Laboratory Experience,” Proceedings of the 2004 American Society for Engineering Education Annual Conference, June 2004, Salt Lake City, Utah.

Chiu H. Choi, “Improving the accuracy of a variable step-size method for solving stiff Lyapunov differential equations,” Proceedings of 2003 American Control Conference, pp.2755-2760, Denver, Colorado, June 2003.

Chiu H. Choi, “Variable step-size method for solving stiff Lyapunov differential equations,” Proceedings of 2001 American Control Conference, pp.4197-4199, Arlington, VA, June 2001.

Chiu H. Choi, “Solving stiff Lyapunov differential equations,” Proceedings of 2000 American Control Conference, pp.3370-3372, June 2000, Chicago, Illinois.

Chiu H. Choi, "Enriching a modern control theory course with computer simulations," Proceedings of the 1999 International Conference on Simulation in Engineering Education, Society for Computer Simulation, pp.77-82, January 1999.

Chiu H. Choi, “A control course integrated with extensive computer simulation,” Proceedings of the 1998 International Conference on Simulation in Engineering Education, Society for Computer Simulation, pp.198-202, January 1998.

Chiu H. Choi, “Address decoding for randomly scattered memory segments of equal size,” IEE Electronics Letters, vol. 33, no. 21, pp.1763-1764, October 1997.

Chiu H. Choi, “Efficient algorithm for the factorization of the transfer function of a bandpass filter,” IEE Electronics Letters, vol. 32, no. 7, pp.642-643, March 1996.

Chiu H. Choi, "An algorithm computing the general entry of the n-th Kronecker power of a matrix," IEEE Transactions on Automatic Control, vol. 38, no. 5, pp.828-830, May 1993.

Chiu H. Choi, "An algorithm computing submatrices of the n-th Kronecker power of a matrix," Proceedings of the IEEE International Symposium on Circuits and Systems, pp.2272-2274, Chicago, Illinois, May 1993.

Chiu H. Choi, "Time-varying Riccati differential equations with known analytic solutions," IEEE Transactions on Automatic Control , vol. 37, no. 5, pp.642-645, May 1992.

Chiu H. Choi, "Time-varying Riccati differential equations for numerical experiments," Proceedings of 29th IEEE Conference on Decision & Control, pp.939-940, Honolulu, Hawaii, Dec. l990.

Chiu H. Choi and A.J. Laub, "Efficient matrix-valued algorithms for solving stiff Riccati differential equations," IEEE Transactions on Automatic Control, vol. 35, no. 7, pp.770-776, July 1990.

Chiu H. Choi and A.J. Laub, "Constructing Riccati differential equations with known analytic solutions for numerical experiments," IEEE Transactions on Automatic Control, vol. 35, no. 4, pp.437-439, April 1990.

Chiu H. Choi and A.J. Laub, "Efficient matrix-valued algorithms for solving stiff Riccati differential equations," Proceedings of 28th IEEE Conference on Decision & Control, pp.885-887, Tampa, Florida, Dec. l989.

Chiu H. Choi and A.J. Laub, "Improving the efficiency of matrix operations in the numerical solution of large implicit systems of linear differential equations," International Journal of Control, vol. 46, no. 3, pp.991-1008, March l987.