AOCS Engineer · Pixxel · Bengaluru
Hi, I'm Subhechha.
I tell satellites where to look.
I write attitude and orbit control software at Pixxel. It decides which way a spacecraft faces, and how gracefully it turns to get there. On the side I run AnyPrint3D, a tiny 3D-printing service: you send the file, I send the object.
Now
At Pixxel I work on guidance, navigation and control for a constellation of hyperspectral imaging satellites. Most days are some mix of quaternions, GNSS data, Python and MATLAB, and convincing a simulation to agree with reality.
- Based inBengaluru, India
- SinceNov 2024
- SpeaksEnglish, Hindi + 2 more
- Thinks inFeedback loops
Trajectory
Three waypoints so far. Not fuel-optimal, but every leg was worth it.
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10.76°N 78.81°E · 2015–2019
Tiruchirappalli
BTech, Instrumentation & Control · NIT Trichy
Where I first got hooked on control. I modelled quadrotors, wrote neural-net models of shape-memory actuators, got robots driving in formation, and closed PID loops on Arduinos. Spent my spare time at the robotics club (RMI), the astronomy club (Nakshatra) and on Pragyan's technical council.
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52.01°N 4.36°E · 2019–2024
Delft
MSc Spaceflight · TU Delft → R&D Engineer · Radac
Did an MSc in Space Exploration. My thesis tracked down modelling errors in the orbit determination of the Sentinel satellites.
Then four years at Radac teaching a radar to read the sea. I designed a real-time wave-field estimator for their phased-array FMCW "Outlooking" radar. It hit ~95% accuracy on simulated North Sea states, and I then tuned it on real data from the vessel Acta Auriga.
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12.97°N 77.59°E · 2024–now
Bengaluru
AOCS Engineer · Pixxel
Back in India, pointing cameras at the planet from orbit. The "attitude" in AOCS is the spacecraft's, not mine, I promise.
Side quest
Live · anyprint3d.subhechha.com
AnyPrint3D
Upload it. I'll print it.
A tiny 3D-printing service I built and run myself. Drop in a model, get a quote, and pick up the print. Spacecraft are hard to hold in your hand, so this is the other way I get to make things.
Get a quote →Things I've built
- 01Reaction-wheel attitude controlSatellite attitude control with reaction wheelsControl ↗
- 02Leader–follower formationThree wheeled robots tracking a trajectory in formationRobotics ↗
- 03Quadrotor modelDynamics and cascaded PD tracking in MATLABModelling ↗
- 04TachometerPID control of motor RPM on an Arduino, in embedded CEmbedded ↗
- 05RAG × OllamaRetrieval-augmented generation on local models, built for a seminarML ↗
Papers
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[1]
A near fuel-optimal station-keeping strategy for halo orbits
Subudhi, Vutukuri, Padhi · IEEE CDC 2020
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[2]
Modeling and trajectory tracking with cascaded PD controller for quadrotor
Subudhi, Ezhilarasi · Procedia Computer Science, 2018
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[3]
Neural network based displacement modeling of shape memory alloy spring actuator
Sul, Subudhi, Dhanalakshmi · IEEE SENSORS 2018
Say hi
Email me about GNC, spacecraft, a print job, or a good control-theory meme.