• Materials applications • Stiffness requirements • Feasibility of fabrication and assembly Consideration to be given to various configurations of structural elements and shapes. 4.2.5.1 Background None available on large space structures of this type. 4.2.5.2 Desired Output Design data and typical structural design arrangements which will satisfy the expected requirements. 4.2.6 Finite Element Model Development Finite element models of selected structural arrangements are needed to evaluate the antenna structural responses to thermal and dynamic loads. These models would ensure that a particular design configuration would satisfy the deflection limitations and pointing accuracy requirements. As part of this study to develop finite element models, consideration could be given to developing a member loading system by increasing or relaxing cable loads based on a deflection sensing system in conjunction with an on-board computer and cable loading/unloading drive system. The objective of this system is to correct any large induced deflections which may occur in the 30-year life due to load and thermal distortions as well as creep. 4.2.6.1 Background None available. 4.2.6.2 Desired Output Feasibility of typical design concepts to meet requirements. 4.2.7 Composite Waveguide The MPTS waveguide will experience extremes in thermal environment and may require tight dimensional and electrical stability throughout these extremes. Composites offer the potential to meet these requirements at low weight and high strength. 4.2.7.1 Background The Air Force Materials Laboratory at Wright-Patterson Air Force Base (Ref 17 and 19) has completed studies on manufacturing methods for dimensionally stable composite
RkJQdWJsaXNoZXIy MTU5NjU0Mg==