TABLE 7-4. SOLAR ARRAY STRUCTURAL CONFIGURATION CHARACTERISTICS AND REQUIREMENTS Minimum Structure Area Density • Widely Spaced Truss Members 7 to 21 kg/m • Minimum Secondary Structure for Reflector and Solar Blanket Support High Bending Stiffness (First Mode • Eliminate Excitation of Structural Bending Frequency < 2 cycles/h) Modes from Attitude Control • Minimize Degradation of Solar Orientation Because of Deflection High Bending Moment Capability • Longitudinal Member Strength Consistent with: — Gravity Gradient/Attitude Control Torques — Orbit Transfer Thrust Loads Structural Member Utilization for • Lateral Member Minimum Cross Power Distribution Bus-es Sectional Area Sized for Power Distribution Through Structure to Central Power Mast Figure 7-7. Comparison of rectangular and elliptical planform geometry.
RkJQdWJsaXNoZXIy MTU5NjU0Mg==