Robert Hemm - Academia.edu (original) (raw)

Papers by Robert Hemm

This report documents efforts to analyze a sample of aviation safety programs, using the LMI-deve... more This report documents efforts to analyze a sample of aviation safety programs, using the LMI-developed integrated safety analysis tool to determine the change in system risk resulting from Aviation Safety Program (AvSP) technology implementation. Specifically, we have worked to modify existing system safety tools to address the safety impact of synthetic vision (SV) technology. Safety metrics include reliability, availability, and resultant hazard. This analysis of SV technology is intended to be part of a larger effort to develop a model that is capable of "providing further support to the product design and development team as additional information becomes available". The reliability analysis portion of the effort is complete and is fully documented in this report. The simulation analysis is still underway; it will be documented in a subsequent report. The specific goal of this effort is to apply the integrated safety analysis to SV technology. This report also contains...

This paper describes two results from a continuing effort to provide accurate costbenefit analyse... more This paper describes two results from a continuing effort to provide accurate costbenefit analyses of the NASA Terminal Area Productivity (TAP) program technologies. Previous tasks have developed airport capacity and delay models and completed preliminary cost benefit estimates for TAP technologies at 10 U.S. airports. This task covers two improvements to the capacity and delay models. The first improvement is the completion of a detailed model set for the Chicago O'Hare (ORD) airport. Previous analyses used a more general model to estimate the benefits for ORD. This paper contains a description of the model details with results corresponding to current conditions. The second improvement is the development of specific wind speed and direction criteria for use in the delay models to predict when the Aircraft Vortex Spacing System (AVOSS) will allow use of reduced landing separations. This paper includes a description of the criteria and an estimate of AVOSS utility for 10 airport...

The Office of the Secretary Defense, Program Analysis and Evaluation, Tactical Air Division (OSD/... more The Office of the Secretary Defense, Program Analysis and Evaluation, Tactical Air Division (OSD/PA&E TACAIR) has an ongoing effort focused on modeling and analysis of air combat and air campaigns in support of OSD decision making and planning. LMI has been assisting TACAIR with that effort. Our previous tasks have included air-to-air campaign modeling and laser propagation modeling: Air-to-air campaign modeling, LMI developed extensions to, and applied, the Stochastic Lanchester Air-to-Air Combat Model (SLAACM). We also completed several related mathematical and campaign analyses. The original version of SLAACM, which includes a single Blue defender against an array of Red escorts and bombers, was expanded to include multiple Blue defender types for two different cases. In the first case, the model was extended to include sequential defense by different types of Blue aircraft. In the second case, the model was extended to include an optimized defense using a mix of Blue defender ty...

This report documents the latest version of the Stochastic Lanchester Air-to-Air Campaign Model (... more This report documents the latest version of the Stochastic Lanchester Air-to-Air Campaign Model (SLAACM), developed by LMI for the Tactical Air Division, a component of the Office of the Secretary of Defense, Program Analysis and Evaluation (OSD PA&E). During the past year, optimized offensive air campaigns, including suppression of enemy air defense and the impact of electronic warfare and low observable technology, have been added to the basic air defense SLAACM to produce a new "attack" version that includes both defense and offense scenarios. The "classic" air defense SLAACM has been retained as a separate version. SLAACM is a fast and flexible model designed for analysts who need to consider many combat scenario options quickly and who wish to have indications of the uncertainties in military outcomes. SLAACM models both the defensive and offensive counter-air battle, including order of battle optimization by both attackers and defenders. The current version...

The report describes analytical tasks performed for OSD/PA&E TACAIR during the period from June 2... more The report describes analytical tasks performed for OSD/PA&E TACAIR during the period from June 2003 through September 2004. The report describes a probabilistic model of campaigns for air superiority between two opponents, an analysis of force concentration in deterministic Lanchester campaigns, and an analysis of high-energy laser propagation. The campaign model is built on research conducted in previous tasks. The primary scenario has relatively few, technically superior defenders being attacked by numerous, technically inferior attackers. The model includes options for both attacker and defender force packages. The ability of the defender to identify and select high value attack formations is a selectable model option. In the model , the attacker optimizes its order-of-battle based on the expected values of targets destroyed and defenders killed. In addition to the model discussions, the report contains a mathematical derivation of force concentration benefits in deterministic L...

This report describes the 2008 version of the Atmospheric Laser and Infrared Transmission (ALIRT)... more This report describes the 2008 version of the Atmospheric Laser and Infrared Transmission (ALIRT) model developed by LMI for the Tactical Air Division of the Office of the Secretary of Defense, Program Analysis and Evaluation. ALIRT is a physical optics model that implements a method for calculating the peak and average fluence delivered to an airborne or ground-based target from a laser weapon on an airborne platform, when the beam propagates through the inhomogeneous, absorbing, scattering atmosphere (refraction and extinction), which is in turbulent motion (turbulence), and when heating of the air by the beam (blooming) may have significant effects. The purpose of the ALIRT model is to support analysis of the use of high-energy lasers and infrared equipment in air combat engagement and campaign analyses.

12th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference and 14th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2012

2013 Aviation Technology, Integration, and Operations Conference, 2013

12th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference and 14th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2012

AIAA's Aircraft Technology, Integration, and Operations (ATIO) 2002 Technical Forum, 2002

10th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference, 2010

6th AIAA Aviation Technology, Integration and Operations Conference (ATIO), 2006

2013 Aviation Technology, Integration, and Operations Conference, 2013

11th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference, 2011

2012 Integrated Communications, Navigation and Surveillance Conference, 2012

ABSTRACT The concepts, operating paradigms, and required technologies of the Next Generation Air ... more ABSTRACT The concepts, operating paradigms, and required technologies of the Next Generation Air Transportation System (NextGen) are still evolving. These continuing changes highlight a need for a modeling platform that can effectively address the complexity of diverse future scenarios and help assess their impact on safety. We discuss this need in detail with respect to the requirements and benefits of such a flexible modeling platform. We describe the LMI ACAS (Airspace Conflict Analysis Simulation) tool, a simulation modeling framework with 3-dimensional visualization, and we show how such an application can meet these analytical requirements and discuss the benefits of implementing a multi-dimensional visualization.

12th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference and 14th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2012

14th AIAA Aviation Technology, Integration, and Operations Conference, 2014