telecommunications) are different from the requirements in the packaged configuration

(usually, these should be as small as possible). But an essential requirement is that the

transformation process should be possible without any damage, and should be

autonomous and reliable [1].

 The most obvious advantages of deployable structures are their optimization of

space and mass when stowed. Other more indirect advantages of deployable structures

are their ability to withstand high loads in the folded position. The ability of deployable

structures to be made "in-situ" allows a single pass in manufacturing architectural

structures such as domes. This is especially useful in space since on-site construction of

erectable structures is tedious as well as risky.

 Potential disadvantages involved in using deployable structures include the trade-

off between the size of the packaged structure and its precision in the deployed state.

Both aspects are usually critical to the mission performance, but are sometimes

conflicting requirements. The flexibility and ability of deployable structures to transmit

random vibrations are hard to account for analytically. Hence deployable structures

prove to be poor substitutes for carefully designed factory products.

 Some significant applications of deployable structures in the aerospace industry are

masts, antennas, and solar panels. Some significant applications of deployable structures

in the civil engineering field are tents for emergency housing or temporary shelters and as

domes for sports stadiums. This thesis focuses on the development of closed loop self-

deployable structures for tents and masts.

 1.2 Deployable Masts

 Masts are suitable for most applications requiring the use of tall stable structures to

provide secure support to antennas or any other equipment needed at specific height.