Type of Award: SBIR Phase III, IDIQ, CPFF, Level of Effort (LOE)/Delivery Order (DO) Contract Number: FA8650-04-D-2409 Lead-In Phase II: F33615-99-C-2911 Awards: DO 001: Security of Large Scale Systems I, PI: E. A. Walters, Period: 2/24/04 to 5/8/06 DO 002: Research in Advanced Power Systems, PI: E. A. Walters, Period: 9/27/04 to 1/26/06 DO 003: Security of Large Scale Systems II, PI: E. A. Walters DO 004: Research in Advanced Integrated Aircraft Systems, PI: E. A. Walters and T. Baudendistel, Period; 5/11/06 to 6/10/11 DO 005: Multi-Level Heterogeneous Modeling, PI: E. A. Walters, Period: 7/13/06 to 10/12/09 DO 006: Evaluation of Advanced Integrated Systems I, PI: E. A. Walters and J. R. Wells DO 007: Bi-Directional Power Architectures for More Electric Aircraft, PI: J. R. Wells, Period: 1/31/07 to 10/15/09 TO 008: Propulsion and Power Integration, PI: E. A. Walters and J. R. Wells, Period: 12/21/06 to 1/15/09 TO 009: Virtual System Integration Laboratory (VSIL), PI: E. A. Walters and J. R. Wells, Period: 10/4/07 to 10/5/09 TO 010: Arc Fault Modeling of an H-60 Generator, PI: B. P. Loop, Period: 7/2/08 to 3/2/09 TO 011: Evaluation of Advanced Integrated Systems II, PI: J. R. Wells, Period: 10/11/08 to 1/10/11 TO 012: Integrated Vehicle & Energy Technology (INVENT) Subsystems Development and Demonstration (SDD), PI: E. A. Walters, Period: 2/17/09 to 6/23/11 Total Funding to Subcontractors: Purdue, Wright State, Lockheed Martin, Northrop Grumman, Radiant, and Rolls-Royce Agencies: U.S. Air Force Research Laboratory Status: On Going Period: 2/24/04 to 2/24/14 Principal Investigator: E. A. Walters Brief Description and Purpose:...
Read MoreMulti-Level Heterogeneous Modeling of F22 Power Subsystem
Type of Awards: SBIR Phase I and Phase II with Enhancements: (1) Inclusion of Easy 5 and Optimal Model Partitioning and Allocation and (2) Power and Cooling Turbo-Generator Contract Numbers: F33615-98-C-2849, and F33615-99-C-2911 Agency: U.S. Air Force Research Laboratory Status: Completed Periods: 5/3/98 to 11/3/98 and3/12/99 to 1/19/05 Principal Investigators: Brian Kuhn / E. A. Walters Phase III: Aerospace Power Scholarly Research Program; F33615-99-D-2974 Abstract: Techniques developed in Phase I allow, for the first time, the interconnection of any number of ACSL simulations implemented in conventional or dedicated computer networks. It appears that the same techniques may be used to parallel not only ACSL simulations but any combination of ACSL, Saber, and/or Matlab/Simulink models. The development of this distributed computing concept in Phase II will provide a marked increase in computation speed and a means of simulating large power-electronic based systems. Moreover, this will allow vendors to interconnection component simulations into a “public domain” system without sharing proprietary information. For example, vendors could simulate their component in any of the above mentioned languages and interconnect their simulation to a system model that would include, for example, sources, distribution network, loads, and associated controls that collectively comprise the core of the selected power system architecture. Virtual prototyping has suffered from the rightful desire of vendors to maintain their competitive edge. The concept proposed herein eliminates this proprietary problem and, for the first time, provides a workable prototyping environment. The Phase II goal is to develop an efficient distributed computer simulation of a F22-like power system and to demonstrate this new prototyping environment through an Industry...
Read MoreMulti-Level Heterogeneous Modeling of the Advanced Amphibious Assault Vehicle (AAAV)
Type of Award: STTR Phase I and Phase II with Funded Enhancement Subcontractors: Purdue Contract Numbers: M67004-99-C-0044 and M67854-00-C-3047 Agency: U.S. Marine Corp Status: Completed Periods: 7/13/99 to 6/13/00 and 5/23/00 to 8/31/03 Principal Investigator: E. A. Walters Abstract: The primary objective of the Phase I effort was to determine the feasibility of a heterogeneous modeling environment for the Advanced Amphibious Assault Vehicle (AAAV). This has been clearly established. In particular, a method of connecting any number of independent time-domain simulations has been developed and used to demonstrate a detailed heterogeneous computer simulation of the salient components of the AAAV electric power system. The primary objective of the Phase II effort is to establish a flexible and powerful distributed modeling and analysis environment for the AAAV electrical power system that can be used to evaluate design alternatives, predict performance characteristics during normal and abnormal (e.g. battle damage) conditions, and serve as a simulation testbed for future design modifications. This facility will reduce engineering and development costs, identify optimum design choices, and avoid unanticipated problems during development and fielding of the AAAV, thereby increasing affordability over its life cycle. Specific tasks to be performed include: the development and validation of a detailed heterogeneous end-to-end simulation of the AAAV electric power system, the development of a multi-level visualization and control interface, the investigation of high-speed computational clusters to improve the computational speed, and the investigation of multi- and parallel rate integration...
Read MoreAero Propulsion and Power Technology
Type of Awards: SBIR Phase I and Phase II with Funded Enhancements Subcontractors: Purdue Contract Numbers: F33615-03-M-2385 and FA8650-04-C-2482 Agency: U.S. Air Force Research Laboratory Status: Completed Periods: 7/10/03 to 4/10/04 and 6/4/04 to 2/24/09 Principal Investigator: E. A. Walters Abstract: PC Krause and Associates, Inc. (PCKA) has developed two key technologies in modeling, simulation, and analysis for support of the design and optimization of large-scale systems. The first of these key technologies is a partitioned finite-element (FE) technique wherein computation times for transient FE models have been reduced by two-orders of magnitude when compared to a commercial FE simulator and has been applied to permanent-magnet, switched-reluctance, and wound-rotor synchronous machines. This increase in computational speed has enabled FE models to be integrated with circuit simulations as part of a design optimization algorithm wherein tradeoffs can be rapidly evaluated in a systematic search for a globally optimal design. The second technology is a variable-fidelity multi-physics simulation infrastructure that enables the user to select between finite-element models that may require hours to days of simulation time through constructive (algebraic) models that may execute hundreds to thousands of times faster than real...
Read MoreA Noninvasive Sensor/Control Suite for Health Monitoring and Extended Life of Aircraft Generation Systems
Type of Awards: STTR Phase I and Phase II Contract Numbers: N00014-06-M-0281and N68335-08-C-0108 Agency: U.S. Naval Air Systems Command Status: On Going Periods: 08/01/06 to 8/30/07 and 2/25/08 to 2/25/10 Principal Investigator: E. A. Walters Abstract: Catastrophic failures in aircraft electrical power systems can compromise the readiness, safety, and capabilities of the war-fighter. In this effort, a multi-physics suite of tools will be developed based upon the successful Phase I research to provide a comprehensive prognostics and health management system (PHM) for aircraft generators and associated electrical systems. The PHM will be based upon a set of recently developed tools that include a novel sensor to measure torque-ripple-induced vibration created by electric machinery, a thermal condition monitor that can predict the temperatures within an electric machine under healthy and damaged operation, and numerical simulation tools that enable rapid development and solution of component and system-level models of electric machinery and power electronic systems operated in fault conditions. Validation of the PHM concepts and the computer simulations used will be performed with hardware using an F-18 generator as the test...
Read MoreDynamic Thermal Management System Modeling of a More Electric Aircraft
K. McCarthy, E. A. Walters, A. Heltzel, PC Krause and Associates, Inc; R. Elangovan, G. Roe, W. Vannice, Boeing; C. Schemm, Lockheed Martin; J. Dalton, Avetec; S. Iden, P. Lamm, C. Miller, U.S. Air Force Research Laboratory; A. Susainathan, U.S. Air Force Aeronautical Systems Center Advancements in electrical, mechanical, and structural design onboard modern more electric aircraft have added significant stress to the thermal management systems (TMS). A thermal management system level analysis tool has been created in MATLAB/Simulink to facilitate rapid system analysis and optimization to meet the growing demands of modern aircraft. It is anticipated that the tracking of thermal energy through numerical integration will lead to more accurate predictions of worst case TMS sizing conditions. In addition, the nonproprietary nature of the tool affords users the ability to modify component models and integrate advanced conceptual designs that can be evaluated over multiple missions to determine the impact at a system level. 2008 SAE Power Systems Conference, November 11-13 2008, Bellevue, WA. Paper...
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