Keyword: Scale models

Briefs: Mechanical & Fluid Systems
Sonic-Boom Tests of Model of a Supersonic Business Jet Plane

A report discusses wind-tunnel tests of a scale model of a con- ceptual two-engine jet airplane designed to carry 10 passengers, have a range of 4,000 miles (≈6,400 km), cruise at a mach number of 2.0, and generate a low sonic boom [char- acterized by a shock overpressure of ≤ 0.5...

Briefs: Mechanical & Fluid Systems

The Rover Analysis Modeling and Simulation (ROAMS) algorithm is to solve the kinematics of a wheeled mo- bile robot (rover) traversing on a rocky terrain. The rover is constructed...

Briefs: Mechanical & Fluid Systems
Uncertainty Models From Ground Vibration Testing

Structural dynamics are often an important consideration when evaluating system characteristics. A concern related to structural dynamics is the analysis of flutter for a flight vehicle. The instability associated with flutter can be quite sensitive to the structural dynamics; therefore, analysis...

Briefs: Materials
Experiments on Residual-Stress Bondline Failures in an RSRM

A report describes an experimental study undertaken to verify a finite-element mathematical model used to predict residual stresses and stress-induced failures in the adhesive interfacial layers (bondlines) that join phenolic liners to interior surfaces of metal housings of...

Briefs: Software
Software for 3D Graphics With Time- and Cost-Saving Features

Enigma version 4.4 is an integrated three-dimensional (3D)-graphics application program that includes multiple cost- and time-saving features. Enigma provides capabilities for building geometric models, key-frame animation, and video recording, and provides graphical front ends for use...

Briefs: Manufacturing & Prototyping

Because the International Space Station is being assembled in orbit, there was a need to verify in advance that it could, indeed, be assembled there and that the various assembled parts would function as intended....

Briefs: Electronics & Computers

A processing system has been developed to meet increasing demands for detailed noise measurement of aircraft in wind tunnels. Phased arrays enable spatial and amplitude...

Briefs: Electronics & Computers

The Kennedy Space Center (KSC) Simulation System is a computing system capable of large-scale mathematical modeling for real-time simulation of the behavior of a complex system that could include many different...

Briefs: Mechanical & Fluid Systems

The EXOS computer program numerically simulates impacts of orbital debris on spacecraft. EXOS can be used to simulate meteoroid- and orbital-debris-impact damage to commercial...

Briefs: Mechanical & Fluid Systems

A boundary-layer rake of pitot tubes has been designed and built for installation on a flight-test fixture (FTF) on the NASA Dryden F-15B, which is a two-seat version of the F-15...

Briefs: Robotics, Automation & Control

A program of flight testing of an instrumented subscale model of the X-33 aerospace vehicle is underway. The objectives of this program are the following:

Briefs: Electronics & Computers

Wiring is a major deliverable in just about all electromechanical equipment. From airplanes to semiconductor capital equipment, the key component tying together all of the technological innovations...

Briefs: Information Technology

A method of computational simulation of the aerodynamic- or hydrodynamic-flow performance features of objects involves the use of neural-network mathematical models implemented in...

Briefs: Mechanical & Fluid Systems
Using Genetic Algorithms in Spacecraft Vibration Control

Three software products are being developed to help satisfy the needs of NASA and of private industry for reconfigurable active control systems to suppress vibrations in Reusable Launch Vehicles (RLVs) and other structures. These potentially highly marketable products are the...

Briefs: Mechanical & Fluid Systems

This airplane is expected to be safe from destruction by flutter instabilities.

Briefs: Information Technology

In aeroservoelastic (ASE)-stability analysis, one considers the coupling of the aerodynamic, inertial, structural, actuation, and control-system elements of the dynamics of an aircraft. The...

Briefs: Mechanical & Fluid Systems

The modified fully utilized design (MFUD) method is undergoing development for use by engineers who favor traditional methods of designing structures over methods based on advanced calculus and...

Briefs: Materials

An improved nonlinear mathematical model is being developed for use in predicting the complex, time-varying stress-and-strain behaviors of viscoelastic materials. The development of...

Briefs: Electronics & Computers

Laser Doppler velocimetry (LDV) systems have been used for a number of years in field and laboratory applications. The normal LDV system consists of a two-color, four-beam...