PX4 Log Analyzer

PX4 Log Analyzer parses flight logs, extracts telemetry streams, and returns concise, decision-ready summaries for developers, operators, and maintenance teams. It supports standard PX4 formats such as .ulg and plain-text .log/.txt and can produce structured data models for downstream analytics. The tool focuses on what happened during the flight, not only how it was captured, helping teams identify root causes quickly. It captures key signals including IMU data, GPS, battery voltage, current, attitude, arming/disarm events, RC inputs, and flight mode transitions. It computes high-level metrics like loop rate stability, sensor health indicators, GPS fix quality, altitude consistency, and power trends, and it can compare current flights against baselines. It also flags data gaps, timestamp mismatches, and suspicious gaps that hinder interpretation. Output formats include a metrics table, anomaly flags, trend summaries, and exports in CSV and JSON.
Conceptually, the analyzer maps each log record to a consistent schema, harmonizes timestamps across streams, and derives features from raw data. It uses rolling averages and time-aligned normalization to produce stable indicators, then applies domain-specific heuristics and z-score based anomaly detection with user-tunable thresholds. Edge handling includes interpolating short gaps when safe and marking longer gaps as missing, ensuring users understand the data quality. The system remains data-centric and avoids making control or behavior recommendations, instead presenting diagnostics and actionable signals that a human analyst can interpret.
Who benefits: firmware engineers validating controller changes, sensor calibration teams verifying data integrity, maintenance crews diagnosing post-flight anomalies, and operations teams evaluating mission reliability across fleets. Use cases include preflight checks to confirm sensor health, post-flight reviews to quantify performance deviations, and fleet-wide trending to spot recurring issues. It supports side-by-side comparisons between flights, exportable reports, and audit-ready histories suitable for flight logs and compliance records.
Unique value stems from PX4-grounded calculations, scalable analysis, and exportable reports. Core features include robust log parsing, field extraction, metric computation, anomaly detection, configurable thresholds, multi-flight comparisons, and export formats (CSV/JSON). It integrates with data pipelines and yields repeatable, shareable results that accelerate debugging, validation, and flight performance optimization.