# Appointed Fixed Time Observer-Based Sliding Mode Control for a Quadrotor UAV Under External Disturbances

> Research article (IEEE Transactions on Aerospace and Electronic Systems, 2021) · cited 171× · AI/ML

**Wikidata**: [openalex:W3189926634](https://www.wikidata.org/wiki/openalex:W3189926634)  
**Source**: https://4ort.xyz/entity/appointed-fixed-time-observer-based-sliding-mode-control-for-a-quadrotor-uav-under-external-disturbances