Type of Award: SBIR Phase III, IDIQ, CPFF, Level of Effort (LOE)/Delivery Order (DO) Contract Number: N00167-99-D-0100 Lead-In Phase II: N00024-97-4097 Awards: DO 001: DO 002: DO 003: Subcontractors: Purdue and UMR: Agencies: U.S. Naval Surface Warfare Center and U.S. Naval Sea Command Status: Completed. Period: 9/30/99 to 9/11/01 Principal Investigator: Paul Krause Brief Description and Purpose: In the mid to late 1990’s, PC Krause and Associates (PCKA), Purdue University, the University of Missouri-Rolla (UMR), and the University of Wisconsin-Milwaukee (UWM) had been extensively involved, as a group, in research, analysis, simulation, and design of power-electronic based systems for government agencies (Navy, Air Force, NASA, and the Army) interested in the more-electric initiative program. This group, of which PCKA was the small business arm, evolved naturally from a need to combine expertise in order to conduct the required work which has involved a large spectrum of power/drive systems ranging from spacecraft to tactical vehicles. The commonalities that exist between these many systems in configuration and components became very apparent. This sole-source contract was the first effort by the Navy to encourage interagency interaction in sharing the results of the research and engineering projects common to shipboard power systems and to provide a convenient funding vehicle to encourage shared funding, among these agencies, for projects of mutual interest. Clearly, this is in keeping with the emphasis on interaction and consolidation of government-funded programs. This contract was one of the first steps toward the goal of establishing an inter-agency funded group made up of universities, government agencies (laboratories), and industry and focused on the research, analysis, design, and development of electric power systems. DO 001 Reports: “Modeling of the Westinghouse Excitation/Generation Systems”, 6/24/02 DO 002 Reports: “Monthly Status Reports”. DO 003 Reports: Naval Combat Survivability Reports (in paper form) “Component Modeling-Ship Service Converter Module”, 5/1/01 “Component Modeling-Power Supply”, 5/1/01 “Component Modeling-Ship Service Inverter Module”, 5/11/01 “Component Modeling-Motor Controller”, 5/11/01 “Component Modeling-Constant Power Load”, 5/12/01 “Generation and Propulsion Testbed Architecture”, 6/6/01 “DC ZEDS Testbed Architecture” 6/6/01 “Advanced Propulsion System Report”,...
Read MoreAerospace Power Scholarly Research
Type of Award: SBIR Phase III, CPFF, Level of Effort (LOE)/Delivery Order (DO) Contract Number: F33615-99-D-2974 Lead-In Phase II: F33615-99-C-2911 Awards: DO 001: Modeling and Simulation Baseline, 9/20/99 DO 002: Simulation of Control Challenge Problem – Electric Power Networks Efficiency and Security (EPNES) Initiative, 8/12/02 DO 003: Aircraft Engine and Subsystem Modeling, 2/28/03 DO 004: Subsystems Design and Analysis, 10/21/02 DO 005: Distributed Heterogeneous Simulation of a UAV DO 006: Propulsion and Power Simulation, 9/30/03 DO 007: Distributed Heterogeneous Simulation Using EASY 5 for UNIX Operating System, 11/25/03 Total Funding to Subcontractors: Rolls-Royce and Northrop Grumman Agencies: U.S. Air Force Research Laboratory Status: Completed Period: 9/20/99 to 3/14/05 Principal Investigator: Paul Krause Brief Description and Purpose: In the mid to late 1990’s, PC Krause and Associates (PCKA), Purdue University, the University of Missouri-Rolla (UMR), and the University of Wisconsin-Milwaukee (UWM) had been extensively involved, as a group, in research, analysis, simulation, and design of power-electronic based systems for government agencies (Navy, Air Force, NASA, and the Army) interested in the more-electric initiative program. This group, of which PCKA was the small business arm, evolved naturally from a need to combine expertise in order to conduct the required work which has involved a large spectrum of power/drive systems ranging from spacecraft to tactical vehicles. The commonalities that exist between these many systems in configuration and components became very apparent. This sole-source contract was the first effort by the Air Force to encourage interagency interaction in sharing the results of the research and engineering projects common to aircraft power systems and to provide a convenient funding vehicle to encourage shared funding, among these agencies, for projects of mutual interest. DO 001 Reports: The Final Report contains a listing of 80 ACSL computer models that were done for DOD up to 9/18/00 DO 002 Reports: “Power System Control Development (ONR IPS Testbed Simulink Models and Documentation)”, 3/15/03 DO 003 Reports: “Subsystems Design and Analysis: Aircraft Engine and Subsystem Modeling”, 1/30/04 “Global Hawk Power System Simulation (Rolls-Royce Software)” 7/3/03 DO 004 Reports: “Integrated Propulsion and Power System Modeling, Simulation and Analysis (IPPoSMo)”, (Northrop Grumman), 8/29/03 “Integrated Propulsion and Power System Modeling, Simulation and Analysis (IPPoSMo)”, Final Report, (PCKA and Northrop Grumman), 1/30/04 DO 005 Reports: “Distributed Heterogeneous Simulation of a UAV Power System”1/14/05 DO 006 Reports: “Propulsion and Power Simulation (Scramjet Propulsion)”, 11/15/04 DO 007 Reports: “Distributed Heterogeneous Simulation Using EASY 5 for UNIX Operating System”,...
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 MoreTransient Electrical Power Response Enhancement for Turbine Drive Generators
Type of Awards: SBIR Phase I with IEDC and Phase II Contract Numbers: N00014-07-M-0328 and FA8650-08-C-2943 Agency: U.S. Air Force Research Laboratory and U.S. Office of Naval Research Status: On Going Periods: 5/4/07 to 3/9/08 and 07/30/08 to 11/30/10 Principal Investigator: J. R. Wells Abstract: Airborne electrical power requirements are increasing significantly to support Intelligence, Surveillance, and Reconnaissance (ISR) sensors, electronic attack suites, and directed energy weapons for military applications. When the electric generator is directly coupled to the propulsion engine, relatively large electric torque transients are often introduced with dynamics faster than previously handled by the engine control system. These transients may have serious implications with regard to stall margins, mechanical stress, speed regulation, and available thrust. To address challenges posed by such transients, this work is developing and demonstrationg novel architectures and system control strategies to maximize transient turbine engine performance utilizing modeling, simulation, and analysis (MS&A). A high-mach missile system is chosen as the prototype for optimization process demonstration and likely candidate for initial technology insertion. This work will expand upon the Phase I efforts through refined modeling and expanded optimization...
Read MoreIntegrated Hardware-in-the-Loop Simulation of a Complex Turbine Engine and Power System
Suraj Ramalingam, Aaron Green, Peter Lamm, U.S. Air Force Research Laboratory; Hank Barnard, Scientific Monitoring, Inc; E. A. Walters, J. R. Wells, PC Krause and Associates, Inc. The interdependency between propulsion, power, and thermal subsystems on military aircraft such as the F-35 Joint Strike Fighter (JSF) and F-22 Raptor continues to increase as advanced war-fighting capabilities including solid-state radars, electronic attack, electric actuation, and Directed Energy Weaponry (DEW) expand to meet Air Force needs. Novel analysis and testing methodologies are required to predict these interdependencies and address adverse interactions prior to costly hardware prototyping. As a result, the Air Force Research Laboratory (AFRL) has established a dynamic hardware-in-the-loop (HIL) test-bed wherein transient simulations can be integrated through advanced real-time simulation with prototype hardware for integrated system studies and analysis. This paper details a test-bed configuration where a dynamic simulation of an aircraft turbine engine is utilized to control a dual-head electric drive stand. The drive stand is connected to an electric generator and associated power system implemented in hardware. The electromagnetic torque produced by the generator is measured and fed back into the turbine engine simulation as a load to the shaft. The HIL capability of this test-bed configuration enables reduced cost altitude testing, supports the design and analysis of integrated starter / generators and alternative power / propulsion architectures, and sets the stage for advanced integrated turbine engine / generator control design. 2006 SAE Power Systems Conference, November 7–9, 2006, New Orleans, LA. Paper...
Read MoreTransient Turbine Engine Modeling and Real-Time System Integration Prototyping
Michael Corbett, Jessica Williams, Mitch Wolff, E. A. Walters, J. R. Wells, PC Krause and Associates, Inc; Peter Lamm, U.S. Air Force Research Laboratory Aircraft power demands continue to increase with the increase in electrical subsystems. These subsystems directly affect the behavior of the power and propulsion systems and can no longer be neglected or assumed linear in system analyses. The complex models designed to integrate new capabilities have a high computational cost. This paper investigates the possibility of using a hardware-in-the-loop (HIL) analysis with real time integration. A representative electrical power system is removed from a turbine engine model simulation and replaced with the appropriate hardware attached to a 350 horsepower drive stand. In order to update the model to proper operating conditions, variables are passed between the hardware and the computer model. Using this method, a significant reduction in runtime is seen, and the turbine engine model is usable in a real time environment. Scaling is also investigated for simulations to be performed that exceed the operating parameters of the drive stand. Similar results are generated with and without the scale factor implemented. Excellent agreement is shown between the HIL and stand alone model results. These results validate the capability of HIL experimentation and provide the opportunity for significant future propulsion configuration studies with minimal cost. 2006 SAE Power Systems Conference, November 7–9, 2006, New Orleans, LA. Paper...
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