a.k.a. Telfair — high-school student in Beijing, China, building things that move and things that learn.
I'm the programmer & driver — and team captain — of VEX team 8632X (formerly 86X & 86Y). Outside of competition I keep building: training robot arms with imitation learning, and taking a twin-engine RC aircraft from parametric CAD to flight-test firmware. What pulls me in is the space where mechanical, electrical, and software engineering meet — all of my projects live exactly there.
End-to-end imitation learning on the SO-ARM101 robot arm: teleoperated data collection (49 demonstrations, 12.6k frames) → ACT policy training (loss 6.79 → 0.11, ~52M parameters on a cloud RTX 4090) → real-world deployment. When the trained model kept reaching for a memorized position instead of the actual object, I didn't stop at the symptom: the repo documents the full pipeline, an 18-entry engineering journal, and a root-cause analysis of behavior-cloning overfitting, closed out with a controlled V2 experiment plan.
Python · PyTorch · LeRobot · ACT · Computer Vision
A fully independent aircraft engineering project: parametric FreeCAD CAD, 1:1 manufacturing templates, a costed procurement plan, circuit design, and a 14-level staged verification ladder for the Raspberry Pi Pico 2 flight controller — with automated QA evidence recorded at every step. Firmware level 3 (watchdog + 30-min endurance soak) and level 4 (200 Hz IMU logging, zero dropped samples) have passed; the airframe is now being built toward a supervised first flight.
FreeCAD · CAD · RP2350 / C SDK · Circuit Design · MPU-6050
C++ code for team 8632X's robot in the 2026–27 RCF Override season, built on the PROS kernel: a shared PID controller, tank-drive chassis, gear-position lift, pneumatics, and 9 competition autonomous routines selectable from the driver controller at the field. Past-season archive: Vex-Pushback-86X — my team 86X robot from the Pushback season (X-drive, LemLib odometry), sharing the same haws motor-control framework.
C++ · PROS · PID Control · Embedded Systems
| Languages | C++, Python |
| Robotics | VEX V5 / PROS, SO-ARM101, sensor fusion (IMU), PID & motion control |
| ML / Data | PyTorch, imitation learning (ACT), dataset pipeline design, model debugging |
| Mechanical / Electrical | Parametric CAD (FreeCAD), laser-cut & 3D-print part design, circuit & wiring design, RC aircraft |
| Hardware | Actuators & pneumatics, motor control, wiring & port-level debugging |
- 🔴 Competing in the 2026–27 VEX season (RCF Override) as captain of 8632X
✈️ Building the SR-71 600 airframe — climbing the 14-level firmware ladder toward a supervised first flight- 🧪 Designing controlled experiments for V2 of the imitation-learning pipeline
- 🎓 Applying to undergraduate programs in Robotics, Mechanical & Electrical Engineering, and CS
Every repo here is built to be read, not just run — full engineering journals, root-cause analyses, and reproduction instructions included.