Liwei Lin (Advisor)

Research Advised by Professor Liwei Lin

Lin Group:  List of Projects | List of Researchers

Caiwei Shen

Alumni
Mechanical Engineering
Professor Liwei Lin (Advisor)
Ph.D. 2018

Emmeline Kao

Alumni
Mechanical Engineering
Professor Liwei Lin (Advisor)
Ph.D. 2018

Benjamin Eovino

Alumni
Mechanical Engineering
Professor Liwei Lin (Advisor)
Ph.D. 2018

Walking Silicon: Actuators and Legs for Small-Scale Terrestrial Robots

Daniel Contreras
Kristofer S.J. Pister
Michel M. Maharbiz
Liwei Lin
2018

This dissertation presents work on components and actuators for silicon-based walking centimeter-scale robots. The focus on this work was on the actuators used to drive these robots and the linkages that make the basic structure of the robot leg.

Pin-joints are used as the basic unit of the leg linkages. The pin-joints were tested in terms of robustness and demonstrated high maximum tensile loads of over 5mN and compressive loads in excess of 100mN.

Electrostatic inchworm motors were the...

Takeshi Hayasaka

Alumni
Mechanical Engineering
Professor Liwei Lin (Advisor)
Ph.D. 2019

Yue Liang

Alumni
Mechanical Engineering
Professor Liwei Lin (Advisor)
Ph.D. 2020

Ilbey Karakurt

Alumni
Mechanical Engineering
Professor Liwei Lin (Advisor)
Ph.D. 2020

Chip-scale Lidar

Behnam Behroozpour
Bernhard E. Boser
Ming C. Wu
Liwei Lin
2016

The superiority of lidar compared to radio-frequency and ultrasonic solutions in terms of depth and lateral resolution has been known for decades. In recent years, both application pull such as 3D vision for robotics, rapid prototyping, self-driving cars, and medical diagnostics, as well as technology developments such as integrated optics and tunable lasers have resulted in new activities. Pulsed, amplitude-modulated continuous-wave (AMCW), and frequency-modulated continuous-wave (FMCW) lidars can all be used for ranging. The latter option enables excellent depth resolution at the...

Frequency Tunable MEMS-Based Timing Oscillators and Narrowband Filters

Henry Barrow
Clark T.-C. Nguyen
Kristofer S.J. Pister
Liwei Lin
2015

Both the accuracy of the clocks and ability of filters to achieve bandwidths small enough to select individual channels depend heavily on the accuracy and precision to which the frequency-setting devices they rely on are constructed. Inevitably, fabrication tolerances are finite, which means the ability to attain the highest performance relies on trimming or tuning. This dissertation focuses on methods by which voltage-controlled frequency tuning of capacitively-transduced micromechanical resonators make possible 1) an ultra-compact, low-power 32.768-kHz micromechanical clock...

Curved and Bimorph Piezoelectric Micromachined Ultrasonic Transducers (PMUT)

Sina Akhbari
Liwei Lin
George C. Johnson
Tsu-Jae King Liu
2016

Ultrasonic transducers have been realized as nondestructive tools for a variety of applications, such as medical imaging, diagnosis, therapy, nondestructive testing, range finding, and gesture recognitions. Ultrasonic transducers fabricated by MEMS (Microelectromechanical Systems) technologies are known to have distinct advantages over conventional ultrasound devices in terms of device resolution, bandwidth, power consumption, and cost. This work focuses on innovative architectures of Piezoelectric Micromachined Ultrasonic Transducers (pMUT) for improved electro-mechano-acoustical...