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Akihiko (Aki) Kumagai

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Courses::Research Projects::CIM Lab::Papers and Publications::Education::Professional Experience::Professional Affiliations


Contact Information


Department of Mechanical Engineering


by appointment




(916) 278-6624



CSU, Sacramento
6000 J Street
Sacramento, CA 95819-6031



Research Interests/Recent Projects::

Research Interests: Manufacturing, Mechanism Design, Kinematics, Mechatronics.

Recent Projects:

Devepoing a pen for tremor patients: This pen for tremor patients is comprised of a pen rod, a pen shell, and a spring-damper element between the rod and the shell. The spring-damper element isolates the pen-rod from the vibration of the pen shell held by a tremor patient while preserving the writing action. Video clip of the prototype pern

Kinematics and Controls of a Docking Simulator at NASA Marshall Space Flight Center: Developed a closed-form forward kinematic anlaysis program and proposed/designed a closed-loop control with a feedforward element for the 6-DOF Stewart Platform docking simulator at the Contact Dynamics Simulation Lab (CDSL), NASA MSFC. This project was done with Joe Brown, a former CSUS student and currently an engineer at Honeywell, through the NASA Faculty Fellowship Program 2006.

Manufacturing Method for Producing Water Pasteurization Indicators (WAPIs): A project with CSUS Dept. of Biological Sciences to develop a simple and economical manufacturing method to produce the Water Pasteurization Indicators (WAPIs): The WAPIs can help people in third world countries for providing safe drinking water.

Links related to this project: Solar Cooker International Engineers Without Borders

Automated Liquid Handling System for Life-Science Labs: A project with a company in San Francisco Bay area to develop an automated liquid handling system to help improve productivity at life-science laboratories.

Links related to this project: Association for Laboratory Automation

Line-Force Generator for McPherson Automobile Suspension System: A project with a manufacturer of coil springs for automobile suspension systems. Coil springs for McPherson type automobile suspension systems need to be designed to minimize the strut friction force for providing riding comfortability to automobile passengers. The developed system is capable of generating 6-DOF forces via a parallel mechanism between two coil spring mounting plates of a given McPherson suspension system. The system allows spring designers to study the relationship between the force acting on the coil spring mounting plates and the strut friction force. Such experimental data is essential for designing an optimal suspension coil spring for riding comfortability. The device is currently U.S. patent pending.

Links related to this project: Society of Automotive Engineers (SAE) World Congress

Shape Memory Alloy (SMA) Actuator for Motion Control: Developed an actuator with a high output force to actuator weight ratio suitable for future miniature mechanisms with a variety of applications including micro-manufacturing.

Links related to this project: The International Organization on Shape Memory and Superelastic Technologies

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Computer Integrated Manufacturing (CIM) Lab - Santa Clara Hall Room 1327 ::

CIM lab is equipped with Mori Seiki ACUMILL4000 Machining Center, Mori Seiki CL-203B CNC Lathe, Sankyo SR8438 SCARA Robot, Allen-Bradley PLC, and other machines/instruments for manufacturing and machine design courses/projects.

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Selected Papers and Publications ::


Liu, T.I., Kumagai, A., Wang, Y.C., Song, S.D., Fu, Z., and Lee, J., “On-Line Monitoring of Boring Tools for Control of Boring Operations,” International Journal of Robotics and Computer-Integrated Manufacturing, Vol. 26, No. 3 June 2010, pp. 230-239.

Kumagai, A., Liu, T., and Hozian, P., “Control of Shape Memory Alloy Actuators with a Neuro-Fuzzy Feedforward Element,” Journal of Intelligent Manufacturing, Vol. 17, No. 1, Feb. 2006, pp. 45-56.

Nishizawa, S., and Kumagai, A., “Development of Programmable Force Line Generator for Coil Springs,” Journal of Springs (in Japanese), Vol. 50, 2005, pp. 39-46.

Liu, T.I., Kumagai, A., and Lee, C., “Enhancement of Drilling Safety Using On-Line Sensors and Artificial Neural Networks,” International Journal of Occupational Safety and Ergonomics , Vol. 9, No. 1, 2003, pp. 37-56.

Kumagai, A., Nishizawa, S., Ikeda, M., Sugiyama, T., Enomoto, H., Sato, N., and Hamano, T., “Modeling of Coil Springs Using Parallel Mechanisms,” SAE Transactions - Journal of Passenger Cars: Mechanical Systems , Vol. 110, Sec. 6, 2002, pp.482-485.

Kumagai, A., Kohli, D., and Perez, R. A., “Near-Minimum Time Feedback Controller for Manipulators Using On-Line Time Scaling of Trajectories,” ASME Journal of Dynamic Systems, Measurement, and Control , Vol. 118, No. 2, 1996, pp. 300-308.

Kohli, D., Kumagai, A., Xu, Y. X., and Sandor, G. N., “Global and Differential Properties of Parallel Manipulators,” Journal of Applied Mechanisms and Robotics, Vol. 3, No. 2, April, 1996, pp. 24-35.

Kumagai, A., Kohli, D., and Sandor, G. N., “Design of Stationary Cams for Cam Modulated Linkages (CMLs),” Journal of Applied Mechanisms and Robotics , Vol. 1, No. 3, 1994, pp. 31-36.


Kumagai, A., “What would be a Sustainable Water Pasteurization Indicator (WAPI) Producing Method for Developing Countries?” 6th SCI World Solar Cooking Conference 2017, Vadodara, Gujarat, India, January 16-18, 2017.

Mojica, J., Kumagai, A., and Marsh, S., “Vibration Suppression Drafting Arm for Tremor Patients,” Proceedings of the ASME International Mechanical Engineering Congress and Exhibition, San Diego, CA, November 15-21, 2013, Paper No. IMECE2013-65217.

Kumagai, A., Liu, T-I, Sul, D., “Radio Frequency Fuel Gauging with Neuro-Fuzzy Inference Engine for Future Spacecrafts,” Proceedings of the 10 th International Association of Science and Technology for Development (IASTED) Conference on Artificial Intelligence and Applications (AIA) , Innsbruck, Austria, February 15-17, 2010, Paper No. 674-020.

Kumagai, A., Suh, Y., Tracy , T., Naritomi, K., and Pierson, K., “Developing a Pen for Tremor Patients,” Proceedings of the 29 th IASTED Conference on Modeling Identification and Control (MIC) , Innsbruck , Austria , February 15-17, 2010 , Paper No. 675-019.

Kumagai, A., Liu, T.I., Khan, M., Yu, S., Johnson, R., Wargala, B., Little, A., and Bear, J., “Manufacturing Methods for Producing Water Pasteurization Indicators (WAPI)”, Proceedings of the ASME International Mechanical Engineering Congress and Exhibition , Chicago, IL, November 5-10, 2006, paper No. IMECE2006-15721.

Kumagai A., T-I Liu, S Setiadharma , and Y Komura, “Development of an Automated Liquid Handling System for Science Lab Automation” accepted for publication in the proceedings of ASEE Annual Conference and Exposition, Portland , OR , June 12-15, 2005.

Nishizawa, S., Ikeda, M., Logsdon, J., Sugiyama, T., Otani, I. , Sato, N., Kumagai, A., Harralson, H., Hozian, P. and Hamano, T., “Development of a Universal Spring Mechanism for Automobile Suspension System Design,” SAE World Congress, Detroit, MI, March 8-11, 2004, SAE Paper # 04AC-79.

Liu T.I., Kumagai, A., Song, S., Fu, Z., Wang. Y., Lee, J., “Intelligent Detection of Boring Tool Conditions,” Proceedings of the 2003 ASME International Mechanical Engineering Congress & Exposition , Washington, D.C., November 16-21, 2003, Paper No. IMECE2003-42347.

Kumagai, A., Liu T.I, Naquvi, M., and Komura , Y., “Development of a SMA Tube Spring Actuator with Forces Air Flow for Improved Time Response in Motion Control,” presented in The International Conference on Shape Memory and Super-elastic Technologies (SMST) 2003 , Pacific Grove, CA, May 4-8, 2003.

Kumagai, A., “Computer Simulation of SCARA Robot Assembly Line for Cycle-Time and Energy Optimization,” Proceedings of t he 2000 ASME International Mechanical Engineering Congress & Exposition , Orlando, FL, November 5-10, 2000, Paper No. 2000-IMECE/MET-6.

Kumagai, A., Hozian, P., and Kirkland, M., “Neuro-Fuzzy Model Based Feedback Controller for Shape Memory Alloy Actuators,” Proceedings of the SPIE's 7 th Annual International Symposium on Smart Structure and Materials , Vol. 3984, Newport Beach, CA, March 5-9, 2000, pp. 291-299.

Kumagai, A., and Kirkland , M., “Development of Neuro-Fuzzy Controller for Shape Memory Alloy Actuators,” presented in Fourth Annual Michigan Space Grant Consortium Conference , Ann Arbor , MI , October 9, 1999 .

Kumagai, A., Freeson, J., Harris, A., Neloms, W., Safieddine, F., and Twal, R., “Design of an Autonomous Ground Vehicle,” The 1997 ASME International Mechanical Engineering Congress & Exposition , Dallas, TX, November 16-21 1997, Paper No. 97-WA/MET-4.

Kumagai, A., Kohli, D., and Sandor, G. N., “Influence of Pressure Angle on Dynamic Stability of Cam Modulated Linkages (CMLs),” Proceedings of the 2nd National Applied Mechanisms and Robotics Conference , Cincinnati , OH November 1991, pp. VIA.4-1 - VIA.4-8.

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Education ::

Ph.D. Mechanical Engineering     May 1993
University of Wisconsin-Milwaukee, Milwaukee , WI

M.S. Mechanical Engineering     August 1985

University of Florida, Gainesville , FL

B.S. Mechanical Engineering    August 1983

University of Florida, Gainesville , FL

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Professional Experience ::

Wayne State University (WSU), Detroit, MI     August 1996 – August 2000
Assistant Professor of Engineering Technology

United Technologies - Automotive Division, Huntington, IN     May 1993 - July 1996

Motorola - Semiconductor Division, Sendai, Japan     September 1985 - July 1988

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Professional Affiliations ::

American Society of Mechanical Engineers (ASME)

Society of Automotive Engineers (SAE)

Society of Manufacturing Engineers (SME)

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last updated: 01/21/2011
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