Plant design for deterministic control of STEMS and tale-springs

Abstract

In this thesis, the limits of conventional linear actuators for long stroke applications are discussed, and tape-spring based actuators such as the STEM are introduced as an alternative solution. While the literature contains several assessments of self-deploying tape-springs, little exists in the area of closed loop deterministic control of such mechanisms. This thesis adapts the existing models of tape springs to form a framework for the study of closed loop controllable tape springs. Included is an evaluation of the validity of the prevailing first order model for a coiled tape-spring. Lastly, several avenues for future research are suggested.