{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/32892"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/32892","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"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. 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