Type of Award: SBIR Phase III, CPFF, Level of Effort (LOE) / Task Ordered (TO) Contract Number: NAS3-27203 Lead-In Phase II: NAS3-25962 Awards: TO 001: Contract Operations, 11/22/93 TO 002: Modeling of DC Link Resonant Mode Controller, 2/18/94 TO 003: Modeling of ARCP Converter, 5/16/94 TO 004: AC Resonant Link Modeling, 5/16/94 TO 005: Modeling and Simulation of DC Restorer Motor Controllers, 2/6/95 TO 006: Modeling of Power Factor and Torque/Amp Control for an Induction Motor, 6/27/95 Subcontractors: Purdue and UMR Agency: NASA LeRC Status: Power-By-Wire Program discontinued on 1/6/97 by NASA Headquarters Period: 11/22/93 to 1/6/97 Principal Investigator: Steve Pekarek Brief Description and Purpose: In the early 1990’s NASA assembled a team made up of several industries in the aircraft community to investigate power-by–wire (more-electric) applications for aircraft. PC Krause and Associates Inc. (PCKA) was contracted to conduct analysis and modeling with the goal of developing an end-to-end simulation of a team developed example more-electric aircraft. Although the team assembled and the goal of the program were appropriate, NASA Headquarters reduced the funding soon after the start of the effort followed by a three month work stoppage and soon after, the program was discontinued. TO 002 Reports: “Modeling for DC Link Resonant Mode Controller”, 1/3/95 “Shunt Filter Design for a DC Resonant Link Based Vector Controlled Induction Motor Drive”, 5/4/95 TO 003 Reports: Only Monthly Status Reports available in file. TO 004 Reports: “AC Resonant Link Modeling”, 8/8/94 TO 005 Reports: Only Monthly Status Reports available in file. TO 006 Reports: Only Monthly Status Reports available in...
Read MoreMore Electrical Aircraft (MEA) Electrical System Modeling, Simulation, and Performance Analysis
Type of Award: SBIR Phase III, CPFF (In response to BAA) Lead-In Phase II: N61533-89-C-0062 Contract Number: F33615-93-C-2361 Subcontractors: Purdue and Northrop Agency: U.S. Air Force Research Laboratory Status: Completed Period: 9/30/93 to 2/19/01 Principal Investigator: Paul Krause Brief Description and Purpose: PCKA and the Aircraft Division of Northrop Corporation teamed to develop and validate component simulations applicable to the More Electric Aircraft (MEA) concept. The overall goal was to provide the Air Force and the aircraft industry with computer simulation support and in-house simulation capability so that MEA power systems would be investigated before, during, and after construction. To achieve this goal, it is proposed to develop detailed hybrid and detailed digital as well as reduced-order computer models of the main components of the MADMEL system. The component simulations were modular and generic in nature so that the models could be used to simulate these components with different ratings and in different system arrangements. Final Report: MEA Electrical System Modeling, Simulation, and Performance Analysis This report is 230 pages in length wherein detailed and reduced order models of the MADMEL components are developed. The components include (1) synchronous machine, (2) switched reluctance generator, (3) PWM inverter fed induction motor, (4) electro-hydrostatic actuator, and (5) MADMEL electrical load simulator. Reports in Paper Form: Modeling and Simulation of UAV Power System Analysis of Switched Capacitance Machinery for Aerospace...
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 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 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...
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