GCR Simulator Reference Field Specification and a Preliminary Beam Selection Strategy at the NASA Space Radiation Laboratory
No abstract available
Slaba, T. C.↗
Engineering topics
Walker, S. A.
Publications and source records attributed to Walker, S. A..
A Reference Field for GCR Simulation and an LET-Based Implementation at NSRL
No abstract available
Slaba, T. C.↗
Design of a control configured tanker aircraft
The benefits that accrue from using control configured vehicle (CCV) concepts were examined along with the techniques for applying these concepts to an advanced tanker aircraft design. Reduced static stability (RSS) and flutter mode control (FMC) were the two primary CCV concepts used in the design. The CCV tanker was designed to the same mission requirements specified for a conventional tanker design. A seven degree of freedom mathematical model of the flexible aircraft was derived and used to synthesize a lateral stability augmentation system (SAS), a longitudinal control augmentation system (CAS), and a FMC system. Fatigue life and cost analyses followed the control system synthesis, after which a comparative evaluation of the CCV and conventional tankers was made. This comparison indicated that the CCV weight and cost were lower but that, for this design iteration, the CCV fatigue life was shorter. Also, the CCV crew station acceleration was lower, but the acceleration at the boom operator station was higher relative to the corresponding conventional tanker. Comparison of the design processes used in the CCV and conventional design studies revealed that they were basically the same.
Walker, S. A.↗