Aerospace

The main objective of this work was to develop a high-fidelity, nonlinear simulation of complex flexible structures with active control systems. A multibody system can consist of several flexible articulating components. The system can also have multiple control systems. The main...

This innovation is a suite of three methods built into a prototype flight deck navigation display interface that supports the display of predicted weather and weather avoidance decision-making. Currently, the interface uses weather objects derived from various convective weather...

Vehicle-scale integration and test requires closed-loop simulation using full-scale avionics systems or even entire vehicles. Incorporation of simulation data into real systems is problematic because real system sensors report the real laboratory...

When designing aerodynamic structures, it is important to understand if, and under what aerodynamic conditions, the structure will be stable and unstable. This is especially true if a structure is inherently flexible, such as a wing, where unstable response leads to oscillations of the...

The Interactive Liner Impedance Analysis and Design (ILIAD) tool is a software package used to design the composite surface impedance of an acoustic liner using resonant channels. ILIAD’s graphical user interface allows the acoustic channel geometry to be drawn in the liner volume while the...

The conceptual aircraft designer is faced with a dilemma on how to strike the best balance between productivity and fidelity. Attempts have been made to use computer-aided design packages to fill this void, but their cost and steep learning curve have made them unwieldy at best. Open Vehicle Sketch Pad (OpenVSP.org) has been...

Probabilistic modeling Charles River Analytics Cambridge, MA 617-491-3474 www.cra.com NASA has contracted with Charles River Analytics to develop a system to measure and assess astronaut workload. The system for Cognitive Assessment and Prediction to Promote Individualized...