WebBased Distributed Simulation of an Aeronautical Propulsion System

1
Web-Based Distributed Simulation of an
Aeronautical Propulsion System

• Gregory J. Follen, Isaac Lopez, Desheng Zhang,
  William R. Pavlik, Xianyou Liu, Tammy M. Blaser
• Glenn Research Center, NASA, Cleveland, Ohio
  44135, USA

NREN Presentation by Robert I. Griffin
2
Overview

• This presentation describes an application that
  was developed to allow users on remote systems to
  simulate flight models and view engine data
  provided by NASA's Numerical Propulsion System
  Simulation (NPSS)
• Work presented within this presentation is part
  of the Aviation Safety Project and represents a
  collaborative effort between NASA Glenn and NASA
  Ames Research Centers
• Contributors from NASA Ames include Bill
  McDermott and Jorge Bardina
• This activity is supported by both the AvSP and
  BASE IT RT programs

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Use Case Scenarios

• How Is This Presentation Relevant to the NREN
  Satellite-enabled Network Connections?
• On-Site Research for New and Proprietary
  Aerospace Technologies. Engine Performance
  Analyses
• Field Investigations of recent Aviation
  Accidents. Provide On-Site Collaboration with
  Forensic Data

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N-Tier Architecture of the Application
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Simplified Architecture and Core Technologies

• Core Technologies include
• Java Server Page (JSP) / Java Beans
• Common Object Request Broker Architecture (CORBA)
• Information Power Grid (IPG/Globus)
• Numerical Propulsion System Simulation (NPSS)
  with 1-D Zooming

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System Elements User Interface

• Web Browser
• Web Browser Interface Allows System Architecture
  Independence and Remote Access
• Web Server
• Tomcat (JSP/Servlet Engine) Open-source,
  reliable. Easy DB Access
• Server Scripting
• Java Server Page Provides Dynamic Web Page
  Content. Connectable to Java Beans

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System Elements Data Files

• Cloudscape DBMS
• Used for storing users simulation configuration
  data
• 100 Java, DB File access via RMIJDBC, High
  Performance
• Flat Files
• Used for flight input and engine simulation
  results
• Easily Exported to Other Applications

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System Elements CORBA

• MICO ORB
• Implementation is CORBA 2.3 Spec. Compliant.
  SSL-Enabled. Open-Source SGI / Linux Versions
  available
• Communication via Internet Interorb Operability
  Protocol (IIOP). No Firewall configuration needed
• Monitors Concurrent Jobs on Multiple IPG Test
  Beds. Efficient Allocation of Jobs to
  Distributed Machines

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System Elements IPG/Globus

• NASA IPG
• Fundamental technologies for Computational Grids
• Secure, (nearly) Seamless Access to Distributed
  Processing Resources
• Managed Resource Allocation
• Allow Remote Access to Secondary Storage

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System Elements NPSS

• Numerical Propulsion System Simulation (NPSS)
• Component-Based Engine Simulation
  (Object-Oriented Architecture)
• Uses Real Radar Telemetry Data to model engine
  performance using a Turbofan Engine Simulation
• Capable of increasing output resolution (zooming)
  from Zero- to One-Dimensional Data

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Data Processing Capacity

• Sample Data from Atlanta (5/20/2000) contains
  1500 flights (arrivals and departures). Single
  engine simulations for this data set were
  processed in 8 hours.

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Demonstration

• Aviation Safety Project Demonstration

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Future Directions

• Enable Simulation for use with Dynamic, Streamed
  Telemetry Data
• Seamless integration of CORBA and Globus Services
  with CORBA-enabled NPSS
• XML Use for Uniform Data Flow and Arbitrary
  Processing
• Increase the Resolution of Engine Prototype with
  Higher Order Zooming
• Perform Full Aircraft Simulations with NASA Ames

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References

• G. Follen, C. Naiman. Numerical Propulsion
  Simulation System (NPSS)/National Cycle
• Program (NCP). HPCC Computational Aerosciences
  Conference, 8/98
• G. Follen, A. Evans, C. Naiman, I. Lopez.
  Numerical Propulsion Simulation System. AIAA
  98-3113, 7/98
• NASA's Numeric Propulsion System Simulation
  (NPSS)
• IPG project
• The Globus project
• I. Foster, C. Kesselman. Globus A metacomputing
  infrastructure toolkit. International Journal of
  Supercomputer Applications, 11115-128, 1997
• The Jakarta Project
• JavaServer Pages specification
• CloudscapeTM - Informix Software
• The MICO CORBA project