Owner's manual





7430‐0131‐01Rev.F
NAV440UserManual Page105


AppendixB. ApplicationExamples
Thissectionprovidesrecommendedadvancedsettingsfortailoringthe440Seriesunitofinertialsystemsto
differenttypesofapplicationandplatformrequirements.
FixedWingAircraft
Afixed‐wingaircraftisaheavier‐than‐aircraftwheremovementofthewingsinrelationtotheaircraftisnotusedto
generatelift.Thetermisusedtodistinguishfromrotary‐wingaircraft,wherethemovementofthewingsurfaces
lane
relativetotheaircraftgenerateslift.Thef
ixedwingaircraftcanrangeinsizefromthesmallestexperimentalp
tothelargestcommercialjet.
Thedynamiccharacteristicsofthefixedwingaircraftdependonthetypeofaircraft(suchasglider,propeller
aircraft,andjetaircraft)andmissionphases(suchaslaunch,landing,andmaneuver).Forbestresultsperdynamic
condition,theappropriatesettingsmustbeapplied.
Table99belowshowsfourexamplesofdynamicconditions
withrecommendedconfigurations.
Table99RecommendedSettingsforFixedWingAircraft
DynamicConditionRecommended
Settings
Pre‐launchorknown
straightandlevelun‐
eleratedflight
acc
Launch

Normal
Dynamics
fault)
(De
HighDynamics
UseMags ON ON ON ON
UseGPS ON ON(<4g) ON ON(<4g)
FreelyIntegrate OFF OFF
1
OFF OFF(<2g)
StationaryYawLock OFF OFF OFF OFF
RestartOverRange ON OFF OFF OFF
DynamicMotion OFF ON ON ON
TurnSwitchThreshold 0.5deg/s 0.5deg/s 0.5deg/s 0.5deg/s
ZFilterAccel 5Hz 5Hz 5Hz
4
15Hz
FilterRateSensor 20Hz 20Hz 20Hz
4
20Hz
Rotorcraft
Rotorcraftisacategoryofheavier‐than‐airflyingmachinesthatuseliftgeneratedbyrotors.Theymayalsoinclude
theuseofstaticliftingsurfaces,buttheprimarydistinguishingfeaturebeingliftprovidedbyrotatingliftstructures.
Rotorcraftincludeshelicopters,autogyros,gyrodynesandtiltrotors.
Therotorbladedynamicsarefasterthanthefixedwingaircraftandcontainhighfrequencycomponents;however,it
maycauseseverevibrationsontheairframe.Theoveralldynamics(translationalandrotationalmotion)oftherotor
craftaremuchslowerthanthefixedwingaircraft.Also,therotorsgeneratesignificantaerodynamicforcesand
amplesofdynamicconditionsandtherecommendedconfigurations.
moments.Table100showstwoex



1
FreelyIntegrateshouldonlybesettoONforseverelaunchconditions.Normaltakeoffdynamicsthatastandardaircraftwould
experiencewillseethebestperformancewiththissettinginthe
OFFposition.