Power and mixed-signal electronics, subsystem engineering

Leonard Gibbs

***D Standard Street El Segundo, CA 90245 661-***-**** *********@*****.***

Seeking

I enjoy developing mixed-signal and power management electronics for advanced or experimental autonomous vehicles and robotics. I am most effective on a small team of similarly obsessed and capable workaholics. Complacency is unacceptable, humility and honesty are essential, nothing easy is worth doing. I am willing and able to juggle multiple projects as long as they are compelling. Education

University of California at Santa Barbara

BS Electrical Engineering, June 2015

Experience

Senior Spacecraft Electrical Systems Engineer, Millennium Space Systems 7/7/15 to present Projects listed chronologically, made “senior” early 2019 Rapid Subsystem Development, summer 2015 to spring 2017

Designed, procured, tested, iterated, and integrated new custom electrical power system components into Altair Pathfinder technology demonstration cubesat https://www.nasa.gov/mission_pages/station/research/experiments/explorer/Investigation.html?#id=7335

Human-rated fault-protected battery, power distribution and monitoring electronics, solar arrays, inhibit system, harness

Orbital power balance analysis

Mission Operations, summer 2017

On console for on-orbit system check-out and accomplishment of all mission objectives

Supporting analysis and advisory work over mission life (>1 year) Low-Volume Production, summer 2017 through fall 2017

Revised Pathfinder electronics with new features and lessons learned

Developed cables and test fixtures, supported a new EGSE engineer to specify and build a custom rack and test scripts for automated unit full-functional testing

My power electronics designs are at the core of all production ALTAIR satellites Environmental Test, winter 2017

Identified manufacturability and documentation issues on a neglected payload adapter board

Corrected design and documentation for manufacturing, updated requirements and methods for automated test box/script, executed protoflight acceptance campaign and flight delivery Motor Drive Electronics, winter 2017

Planned and executed fully successful stepper motor demonstration supporting a proposal, from requirements decomposition through custom PCB design, test fixture setup, firmware specification, and end-to-end motor-load test

Demo PCBs are now integrated into equipment for several other programs, work later adapted into stepper motor gimbal upgrade to an unrelated internal product Electrical Power System Lead, spring 2018 through spring 2020

Solely responsible for design and delivery of EPS for multi-vehicle microsat flight program

Solar array and battery sizing, procurement of core hardware, subsystem design, specification and oversight of new in-house current regulator

Specification and management of a solar array subcontract

Iterative simulation of power system, negotiated with needs and capabilities of all other spacecraft subsystems to close an experimental, semi-autonomous, dynamic mission profile

Defense of subsystem design and analysis to customer at contract milestones

Avionics interface definition support for custom propulsion system from new vendor

Wrote and executed component and sub-system test procedures, successfully integrated EPS Electrical Power System Lead, fall 2019 through present (paused)

– Similar role to previous program, different orbit but similarly advanced experimental high- performance autonomous microsat system with high cross-coupling between subsystems

– Customer requirements decomposition for spacecraft power system and associated custom hosted multi-spacecraft dispenser system

– Supported cross-disciplinary payload/mission ICD development and negotiation, spacecraft trade studies spiralling to ultimate design closure with reasonably distributed (but very low) margin among subsystems

– Psuedo-schematic design, circuit analysis, and specification of custom payload interface and battery enable/charging modules supporting the system range safety architecture I defined

– Mentorship and oversight of 4 electrical engineers working peripheral (sub)systems including hardware prototype of the payload interface board, dispenser power/data/thermal control electronics architecture and schematic design, and firmware specification Electrical Power System Lead, spring 2020 through present

– Similar role to previous program, this time for a more traditional very-high-reliability system

– I did the EPS work for the proposal and since then the funded team has been rapidly developing trade studies to support several “moving target” interfaces as we approach SRR

– System-level research, documentation, and specification of partially redundant architecture including definition of opportunities to improve performance with new in-house designs Skills

Mixed-signal and power management and distribution circuit and PCB design Circuit and system simulation (SPICE, spreadsheet, MATLAB) Requirements decomposition, product specification, development/qualification oversight Current Top Secret clearance

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