# Sparse Magnetometer-free Inertial Motion Tracking – A Condition for Observability in Double Hinge Joint Systems

> Research article (IFAC-PapersOnLine, 2020) · cited 18× · AI/ML

**Wikidata**: [openalex:W3003552077](https://www.wikidata.org/wiki/openalex:W3003552077)  
**Source**: https://4ort.xyz/entity/sparse-magnetometer-free-inertial-motion-tracking-a-condition-for-observability-in-double-hinge-joint-systems