• Developed and maintained production control algorithms for multiple 3D printer subsystems in C++

• Lead controls engineer for the Oxygen Subsystem. Responsibilities included implementing novel control algorithms, managing state machines, improving plant design, tuning actuators, and troubleshooting bugs

• Designed a cascaded I-controller to regulate oxygen partial pressure in a system with a 10 minute transport delay

• Implemented a gain scheduling algorithm to prevent the mass flow rate controller from amplifying flow perturbations

• Performed root cause analysis on Oxygen Subsystem field failures and promptly addressed issues to unblock customer projects

• Designed and implemented a real-time resin level detection feature which used force telemetry and digital filtering techniques to precisely determine resin volume during printing within +/- 50 mL

• Used field telemetry data queried from AWS relational databases to simulate and test the production resin level detection algorithm against a true positive dataset

• Lead designer of a 3-DOF active vibration isolation platform capable of isolating and positioning a 100 kg wafer stage with double-digit nanometer precision

• Developed and implemented a PID control algorithm to attenuate ground vibrations entering the stage up to 10X more than the existing passive solution

• Modeled and simulated isolator control algorithms and digital filters in Python, targeting specifications such as control bandwidth, damping ratio, overshoot, steady-state error, gain/phase margins, and stability

• Assisted in the development of stage motion control algorithms by implementing new filter designs, testing and tuning new controllers, and configuring hardware within the motion controller environment

• Implemented controllers with C/C++ and verified closed loop performance using telemetry from linear encoders and single axis accelerometers

• Designed systems in CREO 5.0 and performed modal analysis in ANSYS to validate derived dynamic models. Corroborated simulation results with results from system identification and hand calculations

● Performed seismic and atmospheric testing on Cisco products to ensure the design was compliant with NEBS requirements

● Collaborated with design and test engineers to develop test fixtures

● Designed and manufactured a single piece weight rack that eliminated the need for a second person during set up

I was tasked with reverse engineering a silk-screen printing machine so that it could accommodate printing jobs up to two feet in height. I designed a steel platform which could be raised and lowered by four lead screws connected via pulleys and a timing belt. The motion was powered by a DC motor. This project involved:

• A complete redesign of the original printing chassis in which the printing base was widened and lowered

• Functional understanding of the mechanisms that operated the printing arm

• Knowledge of machine design concepts to size motors, bearings, lead screws, pulleys, and belts

• Collaboration with computer and electrical engineers on control of the DC motor and printing arm