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500ft/README.md

Mergen Ulziibayar

Mechanical engineering student at NYU building evidence-driven robotics and mechanical systems: Predict → Measure → Compare → Revise.

My strongest work is organized around explicit acceptance gates, reproducible analysis, and honest negative results—not just finished-looking demos. Where a result is simulation-only or a measurement is still pending, the repository says so.

Flagship work

When should a soft robot recalibrate? A reproducible simulation study of pressure–volume probes and pressure-only pose estimation. Across 2,000 actuator-split traces, P-V loop area tracks fatigue compliance drift at pooled r = 0.885, and the deployed trigger has no positive temporal lead—a limitation reported rather than tuned away. The archived v1.3 manuscript carries a published correction notice for a methods overstatement; a corrected candidate is under author review, with no DOI or arXiv identifier claimed.

F1TENTH-scale vehicle modeling, system identification, controls, ROS 2 telemetry, and LiDAR-mast structural design. The baseline mast failed its ≥200 Hz modal guard at 174.7 Hz; the redesigned geometry clears it at 285.5 Hz in mesh-converged FEA, a 1.43× margin. A calibrated physical compliance test is preregistered and measurement is pending.

Guarded micro-UAV release-to-recovery study. The robustness sweep recovers only 4.0% under placeholder torque; an assumed four-motor mixer combined with a revised controller recovers 300/300 in the reported sweep—not an isolated torque fix. The deciding 7.0 V bench gate is frozen at 0.020 N·m with at least 962/1,000 primary recovery trials; measurement is pending.

Supporting projects

  • engineering-audit — CLI and benchmark suite that checks units, formulas, assumptions, and arithmetic in LLM-generated engineering calculations, with hash-verified capture provenance.
  • segmented-shroud-aeromechanics — measurement-first research design on segmented rotor-shroud defects and tip clearance.
  • uav-failsafe-composition — configuration-specific native UAV recovery after command loss, with falsifiable fleet-composition experiments.
  • sensor-enclosure-thermal-design — analytical thermal design and day/night test preparation for outdoor sensor enclosures.
  • informal-road-mapping — satellite screening for candidate informal-road corridors; synthetic tests, Mongolia validation pending.
  • Nomad — maps mechanical-engineering topics to ranked papers, researchers, and source-linked project ideas.

Links

Python · CAD/FEA · ROS 2 · controls · system identification · experimental design

Pinned Loading

  1. healthcare-access-uncertainty healthcare-access-uncertainty Public

    Which healthcare-access classifications stay stable under road-time, closure and facility uncertainty, and which observations resolve the rest at least cost? Toy-graph results so far; geographic va…

    Python 2

  2. sensor-enclosure-bias-prediction sensor-enclosure-bias-prediction Public

    How much per-design field co-location can measured geometry, material and power data plus shared thermal laws replace for outdoor air-quality sensor enclosures? Heat-balance model and test preparat…

    Python 1

  3. soft-actuator-recalibration soft-actuator-recalibration Public

    Simulation study of pressure–volume probes for scheduling soft-actuator recalibration, with reproducible policy comparisons and explicit evidence limits.

    Python 1

  4. sim-to-real-controller-ranking sim-to-real-controller-ranking Public

    Can disagreement among vehicle models consistent with development data flag controller rankings that will reverse on a real F1TENTH car? Public F110 archives qualified structurally; ranking waits o…

    Python 1 1

  5. multirotor-recovery-warning multirotor-recovery-warning Public

    Does a maneuver-specific recovery warning beat a thrust-to-weight feasibility baseline on unseen battery packs and payloads? Public flight data so far; hardware tests pending.

    Python 1

  6. px4-failsafe-differential-testing px4-failsafe-differential-testing Public

    Python model of PX4's failsafe state machine checked against the compiled firmware by differential testing, plus runtime timing observations. Paused; the deployment-study successor will be a separa…

    Python 1