RodosVisor is an object-oriented and bare-metal virtual machine monitor (VMM) or hypervisor designed for the aerospace industry, mainly to provide time and spatial separation to the NetworkCentric core avionics machine, Montenegro and Dittrich (2009). The NetworkCentric core avionics machine consists of several harmonized components working together to implement dependable computing in a simple...

A quadratically convergent Newton method for computing the polar decomposition of a full-rank matrix is presented and analysed. Acceleration parameters are introduced so as to enhance the initial rate of convergence and it is shown how reliable estimates of the optimal parameters may be computed in practice. To add to the known best approximation property of the unitary polar factor, the Hermit...

At The Aerospace Corporation, we run a large FreeBSD based computing cluster to support engineering applications. These applications come in all shapes, sizes, and qualities of implementation. To support them and our diverse userbase we have been searching for ways to isolate jobs from one another in ways that are more effective than Unix time sharing and more fine grained than allocating whole...

This paper presents a short review of the history surrounding the development of haptic feedback systems, from early manipulators and telerobots, used in the nuclear and subsea industries, to today’s impressive desktop devices, used to support real-time interaction with 3D visual simulations, or Virtual Reality. Four examples of recent VR projects are described, illustrating the use of haptic f...

The present article proposes a predictive control law for orbital spacecraft rendezvous hovering phases. An innovative description of periodic spacerestricted trajectories based on computing the envelope of a family of curves is given. This description is used to provide a model predictive controller able to minimize the fuel consumption and account convex constraints, such as periodicity, satu...

Assessing the relative efficiency of energy use among similar manufacturing industries Fernando Aguirre, J. Rene Villalobos , Patrick E. Phelan and Rafael Pacheco US Airways, AZ 85281, U.S.A. International Logistics and Productivity Improvement Laboratory, School of Computing, Informatics and Decisions Systems Engineering, Arizona State University, Tempe, AZ 85287-8809, U.S.A. School of Mechani...

In this white paper we survey the use of computational simulation for aerodynamics, focusing on applications in Aerospace and Turbomachinery. We present some representative problems to illustrate the range of complexity in fluid simulations and the associated computational requirements. We also examine the design process in current industrial practice, and the role played by computational fluid...

The polar decomposition A = UH of a rectangular matrix A, where U is unitary and H is Hermitian positive semidefinite, is an important tool in various applications, including aerospace computations, factor analysis and signal processing. We consider a pth order iteration for computing U that involves p independent matrix inversions per step and which is hence very amenable to parallel computati...

Evolutionarily, man is a terrestrial mammal, adapted to land. Aviation and now space/microgravity environment, hence, pose new challenges to our physiology. Exposure to these changes affects the human body in acute and chronic settings. Since skin reflects our mental and physical well-being, any change/side effects of this environment shall be detected on the skin. Aerospace industry offers a u...

High performance computing (HPC) encompasses advanced computation over parallel processing, enabling faster execution of highly compute intensive tasks such as climate research, molecular modeling, physical simulations, cryptanalysis, geophysical modeling, automotive and aerospace design, financial modeling, data mining and more. High performance simulations require the most efficient compute p...