flexlib: Robust Biomechanics With Hysteresis and Rust-Powered Speed

Our FlexTail Software Ecosystem: Advancing Biomechanical Analysis

flexlib is our Python library for processing and analyzing data from the wearable FlexTail sensor, designed for real-world robustness and scientific depth.

What flexlib Does

• Data ingestion from CSV and RSF formats.
• Signal analysis with hysteresis‑based state detection.
• Biomechanical metrics such as sagittal flexion, lateral flexion, and rotation.

The Power of a Hybrid Approach: Python meets Rust via Maturin

We implement performance‑critical components in Rust for its exceptional speed and memory safety, and expose them to Python with Maturin. This gives data scientists a familiar interface while delivering native performance for large‑scale processing.

Why Hysteresis Matters in Noisy Signals

Wearable sensor data can be noisy. Hysteresis solves this by introducing two thresholds and a memory of the previous state, often implemented with a Schmitt trigger. It filters transient noise and prevents rapid toggling when the input hovers around a single limit.

Benefits:

• Noise rejection without heavy smoothing filters.
• Preservation of sharp, meaningful transitions.
• Deterministic behavior under borderline conditions.