# An Assist-as-Needed Controller for Passive, Assistant, Active, and Resistive Robot-Aided Rehabilitation Training of the Upper Extremity

> Research article (Applied Sciences, 2020) · cited 52× · AI/ML

**Wikidata**: [openalex:W3118421394](https://www.wikidata.org/wiki/openalex:W3118421394)  
**Source**: https://4ort.xyz/entity/an-assist-as-needed-controller-for-passive-assistant-active-and-resistive-robot-aided-rehabilitation-training-of-the-upp