stk aircraft mission modeler
DESCRIPTION
STK Aircraft Mission Modeler. Tom Neely. Introduction. About the author and inventor â Tom Neely F-14 Tomcat Radar Intercept Officer 850 flight hours 170+ carrier arrested landings US Naval Postgraduate School Aerospace Engineering Electrical Engineering Analytical Graphics - PowerPoint PPT PresentationTRANSCRIPT
Pg 1 of 39AGI www.agiuc.com
STK Aircraft Mission Modeler
Tom Neely
Pg 2 of 39AGI www.agiuc.com
Introduction
About the author and inventor â Tom Neely
⢠F-14 Tomcat Radar Intercept Officerâ 850 flight hours
â 170+ carrier arrested landings
⢠US Naval Postgraduate Schoolâ Aerospace Engineering
â Electrical Engineering
⢠Analytical Graphicsâ Development project leader
â Author of STK/Radar and STK/Matlab
Pg 3 of 39AGI www.agiuc.com
Agenda
⢠Intro to Aircraft Mission Modelerâ What is Aircraft Mission Modeler?â Rapid mission modeling in 3Dâ Terrain followingâ Detailed Mission Modeling
⢠Sites & procedures⢠Performance Models⢠Phases⢠Catalogs
⢠Under the hood
Pg 4 of 39AGI www.agiuc.com
Aircraft Mission Modeler
⢠New aircraft object propagator
⢠Significantly enhanced over great arc aircraft
⢠Based on aircraft performance characteristicsâ Airspeed
â Climb rate
â Roll rate
â Bank angle
⢠Aircraft typesâ Pre-defined
â Customizable
Pg 5 of 39AGI www.agiuc.com
Aircraft Mission Modeler (cont.)
⢠Quickly create fundamental mission modelsâ 3D Editingâ One-click maneuversâ Smart aircraft performance defaultsâ Numerous modelsâ Catalogs
⢠Ability to design advanced mission modelsâ Aircraft modelsâ Build complex, multi-segment mission models
Pg 6 of 39AGI www.agiuc.com
3D editing
⢠Inserting a site
⢠Procedure control points
⢠Move, rotate and stretch holding patterns
⢠Alter heading and climb angle at a waypoint
⢠Move waypoint/runway
Pg 7 of 39AGI www.agiuc.com
Aircraft
⢠Defined by a family of performance models
⢠Performance model categories in STK 7.0:â Climbâ Cruiseâ Descendâ Accelerate (turn)â Takeoffâ Landâ Terrain Following
Pg 8 of 39AGI www.agiuc.com
Aircraft (cont.)
⢠Contain default performance models
⢠Users can design new performance models
⢠Procedures and performance define flight path
⢠Aircraft and performance models are extensible
Pg 9 of 39AGI www.agiuc.com
Sites
⢠Waypoints and runways
⢠Every procedure refers to a site
⢠Sites constrain the type of procedure
⢠Sites can be saved to a catalog
⢠Sites are extensible
Pg 10 of 39AGI www.agiuc.com
Procedures
⢠Procedure types included in STK 7â Takeoff and landingâ Various point-to-pointâ Various holding
⢠Architecture is extensible
Pg 11 of 39AGI www.agiuc.com
Mission modeling
⢠Aircraft with defined performance models
⢠One or more phasesâ Use specific performance models for each phase
⢠Each phase has procedures
⢠A procedure refers to a site
⢠Sites constrain procedure types
Pg 12 of 39AGI www.agiuc.com
Mission Modeler UI
⢠Supports rapid setup
⢠Aircraft-specific performance
⢠Combines proceduresâ Takeoffâ Enrouteâ Arcâ Acceleration (turn)â Holding patternsâ Landing
⢠Configurable, graphical feedback
Pg 13 of 39AGI www.agiuc.com
Aircraft performance models
⢠User-configurable aircraft models
⢠Unlimited number of performance models per aircraft
⢠Linked to 3D visual model
⢠Built-in models with user-selectable parameters
⢠Extensible via API
Pg 14 of 39AGI www.agiuc.com
Catalogs
⢠Maintain a collection of objects for reuseâ Aircraftâ Waypoints
⢠User defined⢠DAFIF
â Runways⢠User defined⢠DAFIF
⢠Catalog is extensible
Pg 15 of 39AGI www.agiuc.com
Catalog UIs
⢠User-configurable catalogs for:â Aircraft models
â Way points
â Runways
⢠Catalog interface for aircraft procedures
Pg 16 of 39AGI www.agiuc.com
Aircraft Mission Modeler
⢠Creating performance models
⢠Modeling a multi-phase mission
⢠Using the catalogs
Pg 17 of 39AGI www.agiuc.com
Under the hood
The following discussion of features and capabilities for Aircraft Mission Modeling includes information
subject to pending patent applications
Pg 18 of 39AGI www.agiuc.com
Under the hood
⢠Aircraft Mission Modelerâ Data-driven systemâ Designed to be used by non-expertsâ Analytic curves parameterized by well known aircraft
performance values⢠Well known aircraft performance values
â roll rate, bank angle, climb rate, airspeed
â Building blocks for constructing complex missions⢠Sites⢠Procedures
Pg 19 of 39AGI www.agiuc.com
Sites
⢠Runwaysâ Lat/lon valuesâ Runway altitudeâ Runway heading
⢠True/magnetic
â Lengthâ Catalog
⢠Create & save⢠Use DAFIF data
⢠Waypointsâ Lat/lonâ Catalog
Pg 20 of 39AGI www.agiuc.com
Procedures
⢠Takeoffâ Choose runway
headingâ Departure Altitudeâ Departure point
rangeâ Use runway terrain
Pg 21 of 39AGI www.agiuc.com
Procedures
⢠Arcâ Turn directionâ Set altitudeâ Bearingâ Arc radiusâ Turn angle
Pg 22 of 39AGI www.agiuc.com
Procedures
⢠Circular holding patternâ Turn directionâ Level off maneuverâ Bearingâ Rangeâ Number of turnsâ Time per turn
Pg 23 of 39AGI www.agiuc.com
Procedures
⢠Figure-8 holding patternâ Level off maneuverâ Bearingâ Rangeâ Widthâ Lengthâ Number of turnsâ Time per turn
Pg 24 of 39AGI www.agiuc.com
Procedures
⢠Racetrack holding patternâ Turn directionâ Level off maneuverâ Bearingâ Rangeâ Widthâ Lengthâ Number of turnsâ Time per turn
Pg 25 of 39AGI www.agiuc.com
Procedures
⢠Landingâ Approach altitudeâ Level off maneuverâ Initial approach fix rangeâ Glideslopeâ Use runway terrain
Pg 26 of 39AGI www.agiuc.com
Point to point flight
⢠Procedures employ point to point flightâ Holding and Arc procedures
⢠Fly from end of the previous procedureâ To holding pointâ To start of Arc
⢠Procedures over-fly waypointsâ Specify heading at waypoint
Pg 27 of 39AGI www.agiuc.com
Point to point flight
⢠Position/heading to position/heading
⢠Turns computed to minimize total heading change
⢠Acceleration performance modelâ Determines bank angle for level, steady turns
⢠Turnsâ Constant radiusâ First turnâ Second turnâ Turn radius
⢠Turn bank angleâ May vary
Pg 28 of 39AGI www.agiuc.com
Translating a great arc aircraft
⢠New aircraft from an existing great arc aircraft
⢠Position and velocity vectors computed the same
⢠Attitude window is usedâ Moving average algorithm
Pg 29 of 39AGI www.agiuc.com
Performance models and procedures
⢠Procedure/performance model exceptionsâ GtArc Procedure
⢠Same logic as âoldâ great arc propagator
â Basic Point to Point⢠Unconstrained behavior desired
â Constant hold segment speed⢠Speed at which aircraft arrives at holding point⢠Specified time per holding turn
Pg 30 of 39AGI www.agiuc.com
Earth surface height model
⢠Major analysis capability improvementsâ Objects close to surfaceâ WGS84 and MSL surfaces differ by tens of meters
⢠AMM uses Mean Sea Level as altitude reference
⢠WGS84 or MSL globe optionsâ Set the globe surface to MSL!
Pg 31 of 39AGI www.agiuc.com
DAFIF
⢠Obtain DAFIFâ Limited distributionâ Versions 7 & 8 supported
⢠DAFIF locationâ ToolsâOptionsâFile FindâDAFIF
⢠Verify your DAFIF
Pg 32 of 39AGI www.agiuc.com
Scripting and customization
⢠Connect is supportedâ Connect is documented
⢠COM is supportedâ Native implementationâ All interaction is through COM interfacesâ Custom user interfaces created with 4DX
Pg 33 of 39AGI www.agiuc.com
Coordinate system
⢠Current proceduresâ Generated in a flat earth coordinate systemâ Altitude is referenced to MSLâ Mapping preserves great arc motionâ Mapped to ECF coordinates
⢠Extensibility modelâ Does not require a flat earthâ Any coordinate system is supported
Pg 34 of 39AGI www.agiuc.com
Level off maneuvers
⢠Desired altitude unattainable
⢠Vertical spiral
⢠Override automatic LOM logic
⢠Delay climb and descent
Pg 35 of 39AGI www.agiuc.com
Vertical plane motion
⢠Arbitrary climb and descent profilesâ Smooth curve
⢠Terrain Followingâ Same type of curve for vertical trajectory
⢠Other vertical plane maneuversâ Constant radius arcsâ Straight line segments
Pg 36 of 39AGI www.agiuc.com
Climb and descent transitions
⢠Performance modelsâ Generate individual climb, cruise and descent profiles
⢠âStitchedâ together by procedures
⢠Climb/descent angleâ Intercepted using a constant radius arc
⢠Trajectory follows the climb/descent angleâ Aircraft changes velocity
⢠Determined by acceleration performance model
Pg 37 of 39AGI www.agiuc.com
Bank angle
⢠Accounts for the total aircraft accelerationâ Horizontal turn radiusâ Vertical plane accelerationâ Speedâ Climb angle
Pg 38 of 39AGI www.agiuc.com
Validation & verification
⢠Performed by Sensis Corporationâ Generated 747-200 external performance model
⢠BADA⢠Compared to flight trajectory generated by STK
â Feedbackâ Implementation
Pg 39 of 39AGI www.agiuc.com
Future
⢠Business partnershipâ Aircraft performance model catalogs
⢠New procedures and performance model categories
⢠V/STOL - T/O, Hover and Landing
⢠Carrier T/O and Landing
⢠Formation Flight
⢠Aerial Refueling
⢠Air Intercept
⢠Guided Missiles