Kristofer S.J. Pister (Advisor)

Research Advised by Professor Kristofer S.J. Pister

BPN873: Small Autonomous Robot Actuator (SARA)

Alex Moreno
Austin Patel
Daniel Teal
Andrew Fearing
2021

The Small Autonomous Robot Actuator (SARA) aims to integrate the Single Chip micro Mote (SCuM), a small millimeter scale solar panel and high voltage buffer (Zappy2), and a MEMS 40-100V inchworm motor that has been demonstrated to push a 7um diameter carbon filament through an adjustable width channel at speeds of 10um/s to 200um/s. SARA has been demonstrated to operate the inchworm motor at 1 Hz with 100V square waves under 200mW/cm2 on separate PCBs and transmit 802.15.4 packets with temperature estimates between 35.5-40 C with a 0.28 std error from SCuM to an OpenMote while on a...

Design and User Guide for the Single Chip Mote Digital System

Sahar Mesri
Kristofer S.J. Pister
Ali M. Niknejad
2016

In order to create a low-power and lightweight wireless sensor node for the control of MEMS microrobots, the Single Chip Mote project aspires to integrate a fully-functioning microprocessor, radio, sensors, and solar cells onto a single die, while also eliminating the need for external components through careful architectural design. This report presents the past two years of work on the design of the Single Chip Mote digital system, complete with an ARM Cortex-M0 microprocessor, control logic for an IEEE 802.15.4 radio, special-purpose radio timers, and ADC interface. This includes...

FEA-Assisted Analysis and Gain Optimization of a Micromechanical Resonant Displacement Amplifier

Gleb Melnikov
Clark T.-C. Nguyen
Kristofer S.J. Pister
2017

Micromechanical resonant switches have the potential to greatly outperform currently dominant semiconductor switches due to their higher figures of merit. Of the current designs available, resonant MEMS switches are among the most promising, as they can achieve very large amplitudes at resonance with greatly reduced actuation voltages compared to more conventional MEMS switches, such as those that rely on pull-in based actuation.

Such resonant micromechanical devices are currently in their infancy, and require additional optimization and analysis to resolve their...

Dosimetry Dust: An Ultrasonic Backscatter Implantable Dosimetry Device

Stefanie Garcia
Michel M. Maharbiz
Kristofer S.J. Pister
2017

Proton beam therapy is a well-established medical procedure for treating certain kinds of cancer, and is uniquely suited for treatment of head, neck, and eye tumors. Despite the continuous improvements in medical physics treatment plan simulations, improper tissue irradiation can easily occur if there is a shift in the tumor and/or critical organs during the irradiation process. A fully implantable dosimeter for in vivo dose measurements can provide closed loop treatment feedback to a physician during radiation treatments, and assist in enabling full irradiation of a tumor. This work...

BPN902: Jumping Microrobots for Low-Cost Asteroid Prospecting

Daniel Teal
2021

We are exploring potential applications of our jumping microrobots in space. While our 1.9x1.2x0.06cm robot has previously jumped 3mm (and can theoretically achieve 3cm or much more) in Earth gravity, the same actuator would reach escape velocity in the 6 micro-g gravity of the Near Earth Asteroid (NEA) Bennu, the target of NASAs current OSIRIS-REx sample return mission. This implies it is possible to build a thousand-robot swarm of 1cm^3 1g robot capable of hopping around and measuring an NEA. This is useful because such a swarm is simultaneously lighter (by orders of magnitude) and more...

Energy Measures for Sensor Networks

Lance Doherty
Kristofer S.J. Pister
Kannan Ramchandran
Ming Gu
2004
The problem of full data recovery from a sensor network of thousands of randomly-placed nodes is addressed as it relates to the complexity of the network data. In the applications of interest, the user requires a representation of the full two-dimensional data generated by a field underlying the area of the network. The usefulness of data recovery algorithms is judged by the units of energy consumption to recover sufficient data to ...

Electro Micro-Metrology

Jason Clark
Kristofer S. J. Pister
James Demmel
Sanjay Govindje
Luke P. Lee
2005
Electro Micro-Metrology (EMM) is a novel methodology for precision metrology, sensing, and actuation at the micro- and nano-scale. EMM is well-suited for tiny technology because it leverages off the electromechanical benefits of the scale. EMM is the method of using micro- or nano-scale devices to measure and characterize themselves, other devices, or whatever the devices subsequently interact with. By electronically measuring the change in capacitance, change in voltage, and/or resonant frequency of just a...

Rachel Zoll

Alumni
Electrical Engineering and Computer Sciences
Professor Kristofer S.J. Pister (Advisor)
M.S. 2019

Lixia Zhou

Alumni
Electrical Engineering and Computer Sciences
Professor Kristofer S.J. Pister (Advisor)
Ph.D. 2004

Leticia Ibarra

Alumni
Electrical Engineering and Computer Sciences
Professor Kristofer S.J. Pister (Advisor)
M.S. 2015