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Bella Tan

PROFILE

Bella Tan

Over four months, Bell Tan developed and enhanced autonomous navigation and control features for the gwhs/2025-Reefscape robotics repository. He implemented choreographed autonomous paths, refactored routines for multi-cycle strategies, and introduced UI improvements to streamline operator command selection. His work included system diagnostics, telemetry integration, and hardware-software alignment, using Java and JSON within a command-based framework. By parameterizing routines and adding emergency stop mechanisms, Bell improved both safety and configurability. The technical depth is evident in his use of embedded systems, control systems, and subsystem integration, resulting in more robust, observable, and maintainable autonomous operations without reported regressions.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

16Total
Bugs
0
Commits
16
Features
9
Lines of code
2,950
Activity Months4

Work History

September 2025

1 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary for gwhs/2025-Reefscape focused on a targeted feature delivery and sustainability improvements in autonomous navigation. Delivered choreo-based autonomous paths for a five-cycle strategy, including refactoring of autonomous routines and tuning of navigation parameters to enhance accuracy and scoring stability across multiple paths. The change set centers on choreographed trajectories, updated waypoint intervals, acceleration constraints, and velocity caps to improve robustness and performance under field conditions. The primary commit (073038af53706aa46870d3c7b2b8e9354654165c) documents the remade 5-cycle w/ choreo (#323).

March 2025

5 Commits • 3 Features

Mar 1, 2025

March 2025: Key autonomy, safety, and configurability improvements for Reefscape. Delivered coral readiness configuration, new autonomous Push_One_Cycle routine, enhanced alignment with joystick early termination, backup intake with parameterized configuration and controller bindings, and a safe emergency-stop mechanism for arm/elevator subsystems.

February 2025

8 Commits • 4 Features

Feb 1, 2025

February 2025 monthly summary for gwhs/2025-Reefscape focused on delivering core features, stabilizing diagnostics, and aligning hardware-software representations, while expanding telemetry and control capabilities to support autonomous operations and rapid triage. Key features delivered focused on health monitoring, unified coral scoring, and hardware naming conventions: - System Diagnostics and Motor Fault Monitoring: motor connection alerts across arm, elevator, and end effector; enhanced diagnostic tooling and Canivore bus telemetry to improve monitoring and fault detection. - Unified Coral Scoring System with Telemetry: consolidates scoring commands into a single scoreCoral() function; added logging to monitor scoring behavior across autonomous paths. - Robot Hardware Refactor: Arm Orientation and Elevator Naming: flips arm orientation in software visuals; updates arm constants; renames elevator motor designations with adjusted position constants to reflect hardware changes. - Dealgae Game Mechanic: New Commands: introduces new dealgae commands and triggers with defined positions and a stow action, wired to controller inputs for coral-level state. Major bugs fixed: - Stabilized motor fault alerts and telemetry integration: fixes to alerts for all motors and Canivore log changes to improve fault detection and traceability. Overall impact and accomplishments: - Improved system reliability, observability, and fault triage speed in Reefscape operations. - Enabled more predictable autonomous behavior through unified scoring and telemetry. - Established consistency between hardware configuration and software representations to reduce misconfigurations. Technologies/skills demonstrated: - Embedded systems, telemetry integration, and Canivore bus interactions. - Software refactoring for hardware alignment, including orientation changes and naming conventions. - Event-driven command design and controller input wiring for coral-level state management. - Logging instrumentation and observability improvements to support monitoring and debugging.

January 2025

2 Commits • 1 Features

Jan 1, 2025

Month: 2025-01. This month focused on delivering autonomous navigation capabilities for Reefscape (gwhs/2025-Reefscape) with UI enhancements and validated routines to reduce operator workload. Key deliverables include new autonomous paths, pre-programmed routines, and an updated UI to select and run autonomous commands. The changes are backed by two focused commits linked to issues for traceability: a2640574ec8a2735a83b6651efe135816bd8568e (auto #19) and d2edc1a672620567c2ddc847435b6d182c5cd8b0 (Leavefromcenter #29). No major bugs reported or blockers identified this month. Overall impact: safer, more autonomous missions, faster throughput, and reduced manual intervention. Technologies/skills demonstrated: navigation algorithm enhancements, UI integration for command execution, incremental Git workflows, and issue-tracking discipline (linked commits).

Activity

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Quality Metrics

Correctness83.8%
Maintainability83.8%
Architecture83.8%
Performance76.2%
AI Usage20.0%

Skills & Technologies

Programming Languages

JSONJava

Technical Skills

Autonomous NavigationAutonomous Path GenerationAutonomous ProgrammingAutonomous RoutinesChoreo LibraryCommand-Based FrameworkCommand-Based ProgrammingControl SystemsEmbedded SystemsEnumJSONJavaPath PlanningRobot ConfigurationRobot Control

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

gwhs/2025-Reefscape

Jan 2025 Sep 2025
4 Months active

Languages Used

JSONJava

Technical Skills

Autonomous NavigationAutonomous ProgrammingPath PlanningRobot ConfigurationRobot ProgrammingAutonomous Routines

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