Craig Shultz

My research interests lie at the intersection of engineering and human-machine interfaces. During my first few years at Northwestern I worked on packaging our lab's TPad type variable friction surfaces into a compact, and easy to use research platform. I was an integral part of each of the TPad Tablet Project's device designs and builds, and most recently developed an ultra compact and efficient driving circuit topology for the TPad Phone. This line of work has been an ongoing project along with Joe Mullenbach, and has also served to educate and employ many different types of undergraduate engineers throughout the years.

More recently, my work has been focused on the discovery and application of DC and wide-bandwidth electroadhesion devices. This class of variable friction surface offers forces that are an order of magnitude larger than previous devices, and have bandwidths that extend all the way into the range of human hearing. Because of this, they can actually create audible sound from the interaction of a finger on a flat plate, thus creating a combinded audio-tactile display. I published a theoretical model and explanation for this electroadhesion effect at the World Haptics Conference in 2015.

M.S. Mechanical Engineering - Northwestern University (2015)
Thesis Title: "Compact Low Voltage Driving Circuit for Ultrasonic Haptic Actuator"
B.S. Electrical Engineering - University of Tulsa (2011)


DSGN 495 Designing Product Interactions

Surface haptic interactions with a TPad tablet

Mullenbach, J., C. Shultz, A. Marie Piper, M. A. Peshkin, and J. E. Colgate, "Surface haptic interactions with a TPad tablet", Proceedings of the adjunct publication of the 26th annual ACM symposium on User interface software and technology - UIST '13 Adjunct, St. Andrews, Scotland, United Kingdom, ACM Press, 2013.