The purpose of this paper is to introduce two deployable booms for corresponding to the recent request of high accuracy and/or large space structure, which are Storable Tubular Extendible Member (STEM) boom and Braid Coated Bi-Convex Tape boom applying Shape Memory alloys (SMA-BCON). As for STEM boom study, the static shape of Bi-STEM is firstly obtained by contact analysis between inner and outer shells. Then, the dynamic behavior of the Bi-STEM is examined by transient analysis. As for SMA-BCON boom study, the deployment behavior is evaluated using handmaid conceptual model. The stepwise deployment behavior is achieved and the importance of synchronous deployments of each boom for the stable center body behavior is pointed out through deployment experiments.
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