This paper presents the first estimate of United States military cost for Persian Gulf force (CPGfp) derived entirely by a quantitative method. An activity-based cost (ABC) model uses geographic distribution of aircraft carriers as a proxy allocator of Department of Defense (DoD) baseline cost to regional operations. Allocation follows simply from DoD data that since 1990 no less than one aircr...

Vector acoustic intensity provides both the direction and magnitude of energy flow at the probe location and is, hence, more informative than acoustic pressure measurements. However, this important quantity has seen little application previously in aeroacoustics. In the present work, an intensity probe, consisting of four microphones, captured the radiated field to the sideline and aft of a tet...

INTRODUCTION Military aircrew and other operational personnel frequently perform their duties at altitudes posing a significant hypoxia risk, often with limited access to supplemental oxygen. Despite the significant risk hypoxia poses, there are few studies relating it to primary flight performance, which is the purpose of the present study. METHODS Objective, quantitative measures of aircraf...

This paper describes the development of an ontology for use in a military simulation system. Within the military, aircraft represent a significant investment and these valuable assets need to be protected against various threats. An example of such a threat is shoulder-launched missiles. Such missiles are portable, easy to use and unfortunately, relatively easy to acquire. In order to counter m...

Extending the range of tactical military networks that are confined to a local geographic area by using small aircraft to relay traffic to geographically distant areas is a topic of interest in military network technology development. Highly directional antennas, incorporated into avionics pods that attach modularly to an aircraft fuselage, can provide long-range, interference-resistant communi...

In this work, we focus on the design and implementation of a robust flight control system for an unmanned helicopter. A comprehensive nonlinear model for an unmanned helicopter system, which is built by our research team at the National University of Singapore, is first presented. A three-layer control architecture is then adopted to construct an automatic flight control system for the aircraft...

Remotely piloted aircraft (RPA), also known as drones, have been used extensively in the recent conflicts in Iraq and Afghanistan. Although RPA pilots in the U.S. Air Force (USAF) have reported high levels of stress and fatigue, rates of mental health (MH) diagnoses and counseling in this population are unknown. We calculated incidence rates of 12 specific MH outcomes among all active component...

The Remotely Piloted Aircraft (RPA), colloquially labeled the “drone,” has become iconic of American military campaigns this century. However, with surging demand for RPA combat operations, the United States Air Force (USAF) has struggled to train and retain sufficient manpower to operate these aircraft. Earlier efforts to address this challenge relied on military intuition and subjective input...

Adaptive control algorithms have the potential to improve performance and reliability in flight control systems. Implementation of adaptive control on commercial and military aircraft requires validation and verification of the control system robustness to modeling error and uncertainty. Currently, there is a lack of tools available to rigorously analyze the performance and robustness of adapti...

Aluminum-Lithium (AI-Li) alloys have been developed as an alternative to conventional aluminum alloys for use in aerospace and other applications where lowweight, high strength materials are required. The use of Al-Li alloys in military and civil air transport continues to increase [1]. The key benefits of AI-Li alloys, when compared to conventional aluminum alloys, are the lower density and hi...