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SYNTHETIC NATURAL ENVIRONMENT MODELING CONCEPTUAL REFERENCE MODEL

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... high level views from different aspects of the total SNE modeling and simulations ... and time/event drive between SNE representations and military systems ... – PowerPoint PPT presentation

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Title: SYNTHETIC NATURAL ENVIRONMENT MODELING CONCEPTUAL REFERENCE MODEL


1
SYNTHETIC NATURAL ENVIRONMENT MODELING CONCEPTUAL
REFERENCE MODEL Guo Gang, Ph.D Huang
Kedi ggwyh_at_yahoo.com Military Simulation
Laboratory College of Mechaeronics Engineering
and Automation National University of Defense
Technology Changsha, Hunan, China, 410073
2003 European Simulation Interoperability
Workshop, 16-19 June 2003, Stockholm, Sweden
2
Presentation Outlines
  • Backgrounds of Synthetic Natural Environment
    (SNE) Modeling
  • Definition of Conceptual Reference Model (CRM)
  • Why its needed, What it is and How it is formed
  • SNE Rational CRM
  • Diagram representation, Formalizations, as well
    as some technical considerations critical when
    concerning with realizations
  • SNE Technical CRM
  • The technical requirements and foundations that
    embrace the full spectrum of SNE and support the
    full scope of todays MS systems

3
Presentation Outlines
  • SNE Operational CRM
  • Using IDEF0 models to capture the pre-runtime
    data requirements and processes from a high
    conceptual level
  • SNE Runtime CRM
  • Establish a standard and reusable reference
    runtime system architecture or framework of
    environment federation with dynamic and total
    environment domain simulation capabilities
  • Conclusions
  • Some conclusions and considerations of further
    research works

4
Synthetic Natural Environment (SNE)
  • SNE modeling and simulation
  • Full SNE domain including terrain, ocean,
    atmosphere and space
  • Full spectrum of environmental data including
    visual, infrared, radar and so on
  • Full scope of MS community applications
    including training, analysis, test and experiment
  • With the aims of interoperability, reuse,
    credibility and high simulation fidelity
  • DMSO MSMP
  • acquiring timely and authoritative natural
    environment representations
  • Integrated Natural Environment (INE) program

5
SNE and Conceptual Reference Model (CRM)
  • Difficulties in SNE modeling and simulation
  • a complete representation of the total SNE
    domains
  • a standard mechanism to exchange data
  • polymorphic data representations to meet visual,
    radar, infrared and CGF requirements
  • So, we need Conceptual Reference Model (CRM) to
  • provide high level views from different aspects
    of the total SNE modeling and simulations
  • define rational infrastructure, technical
    framework, operational concepts, application
    patterns as well as the principles, methods,
    technologies, processes, models and simulations
  • communicate and understand

difficult and complicated
6
Conceptual Reference Model
  • Definition of concept
  • Concept is the abstract, denotation, delegation
    of the existence, entity, process and concretion
    instead of the detailed things or implementations
    themselves
  • a mean to understand and communicate
  • a denotation to represent some details or
    processes
  • a method to classify and organize some
    hierarchies and structures
  • also a blueprint to guide analysis, design and
    implementations or to gestate visions

7
Conceptual Reference Model
  • SNE CRM
  • a reference model that establishes, describes,
    organizes and standardizes the concepts from the
    rational, technical, operational and runtime
    aspects of the SNE modeling
  • and thus captures a high level view for the
    purpose to abstract, understand, communicate,
    represent, organize and guide the system
    analysis, design and implementation

8
Why the Conceptual Reference Model
  • To understand and communicate
  • To capture the concepts of the SNE modeling and
    provide high level views
  • To promote and facilitate high interoperability,
    reuse, credibility and fidelity
  • To build up a reference framework and a blueprint
    for system develop

9
What and how the Conceptual Reference Model
  • Complete, unambiguous, brief when design the CRM
  • The whole CRM is composed of four parts with each
    according to one aspect
  • the rational CRM rational basis
  • the technical CRM technical requirements
  • the operational CRM pre-runtime data process
  • the runtime CRM runtime framework

These together provide a brief and complete
abstract of the SNE modeling
10
SNE Rational CRM
  • derived from the one that proposed by Paul A.
    Birkel in 98F-SIW-018
  • fundamental and graphical
  • more explicit internal relationships
  • data flow and time/event drive between SNE
    representations and military systems
  • separation of data and model
  • distinguish environment effects from military
    impacts

11
(No Transcript)
12
Formalization of SNE Rational CRM
  • System, model and simulation
  • model is a kind of physical, mathematical or
    logical description or representation of system
  • the model must have correct and unambiguous
    interpretations responding to system for
    similarity, consistency, functionality and
    utility
  • simulation is running a model over a period of
    time with given data

13
Formalization of SNE Rational CRM
  • For SNE systems and models, we have
  • natural environment exists as continuous spatial
    domains which can be denoted by
  • the time axis is usually be defined as a period
    of continuous and even time flows denoted by
  • In facts, the data used to represent SNE states
    are essentially properties related with a special
    spatial point, area or domain and a time point or
    period and many properties are derived from
    others or overlapped. So, we only focus on higher
    levels and define those properties of interest as

14
Formalization of SNE Rational CRM
  • Now we can denote the environmental states as a
    model with the form of
  • The internal environment models are used to
    describe relations between environment physical
    properties, environment dynamics along time and
    statistics with respect to phenomenon or
    procedures. We can formalize these models as

15
Technical considerations of SNE Rational CRM
  • the resolution and granularity of the space
    domain and the time axis
  • reasonable partition of space domain, time axis
    and property space
  • multi-representations
  • correlations and consistence of databases
  • although the SEDRIS Data Representation Model
    (DRM), but a common environment data model is
    great needed
  • data flow or event drive between the military
    system models and the natural environment

16
SNE Technical CRM
  • the common supporting technologies that implement
    the rational CRM
  • common data model and data representation and
    interchange
  • environment library
  • environment scenario generation
  • environment effect and impact models
  • environment federates or federations, tools and
    utilities

17
SNE Technical CRM
18
SNE Operational CRM
  • simulation is running a model over a period of
    time with given data
  • to capture the pre-runtime data requirements and
    processes from a high conceptual level
  • using IDEF0 models to capture the process, steps,
    participants, constrains, mechanisms, inputs and
    outputs
  • top level actions
  • analyze the requirements
  • acquire source data
  • produce the deliverable authoritative SNE
    transmittals
  • compile into runtime format

19
SNE Operational CRM
more elaborate depictions when decomposed
20
SNE Runtime CRM
  • SNE simulation with given models and data,
    running along time axis
  • a reference model of the framework of the
    environment federation utilizing the concepts and
    technologies in SNE modeling and adopting HLA
    jointly
  • to establish a reference model of standard and
    reusable system architecture
  • System architecture
  • OASE server what is a sound design?
  • dynamic terrain surface and subsurface dynamic
    effects and impacts as well as hydrology how
    about internal relations, function divisions and
    protocols?
  • 3D Viewer, the 2D Display and AAR functions FOM
    agility

21
SNE Runtime CRM
22
Conclusions
  • the SNE modeling and simulation domain is more
    and more becoming a common infrastructure that
    support the DoD wide modeling and simulation
    communities
  • a complete, standard, brief and unambiguous
    reference model is greatly needed to establish,
    describe, organize and understand the concepts,
    frameworks and hierarchies when modeling the SNE
  • we view from the rational, technical, pre-runtime
    and runtime aspect
  • more need to be done, formalizations and so on

23
Conclusions
  • critical technical focuses
  • complete, unambiguous, effective representation
    and interchange
  • common lexicons, syntax and semantics and common
    data models
  • correlations and consistency of both pre-runtime
    and runtime SNE models and states
  • multiple and polymorphic representation in SNE
    modeling
  • dynamic environment and standard models of
    effects and impacts
  • authoritative and timely SNE data acquirement,
    automatic, rapid and cost effective

24
Thanks!
Ph.D Guo Gang ggwyh_at_yahoo.com Military
Simulation Laboratory College of Mechaeronics
Engineering and Automation National University of
Defence Technology Changsha, Hunan, China, 410073
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