# Design of an Active and Passive Control System for a Knee Exoskeleton with Variable Stiffness Based on a Shape Memory Alloy

> Research article (Journal of Intelligent & Robotic Systems, 2021) · cited 16× · AI/ML

**Wikidata**: [openalex:W3132459309](https://www.wikidata.org/wiki/openalex:W3132459309)  
**Source**: https://4ort.xyz/entity/design-of-an-active-and-passive-control-system-for-a-knee-exoskeleton-with-variable-stiffness-based-on-a-shape-memory-al