Driving Rotary Simulator Effectiveness through Improved ... · Who are we? •Nova Systems Europe...
Transcript of Driving Rotary Simulator Effectiveness through Improved ... · Who are we? •Nova Systems Europe...
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Driving Rotary Simulator Effectiveness through Improved Standards
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Who are we?
• Nova Systems Europe• Fixed & Rotary Flight Test
• Simulation Test• P3 Orion, A330 MRTT, E-7A Wedgetail, C130H/J, F/A18E/F
• Blackhawk, AW101, Sea King
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Who are we?
• Nigel Gates• Royal Navy
• ETPS
• EASA TP
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Who are we?
• Steve Camporeale• Australian Army
• ETPS FTE
• CEO
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Why are we here?
• Flight test background
• Experience of RW simulation test• FSTD(H), CFR 60
• Demonstrate shortfalls in standards
• Suggest improvements
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The Need
• Increased synthetic training• Reduce cost
• Increase safety
• More “Negative Training” potential
• Legacy Standards• EASA FSTD(H), FAA 14 CFR60
• Teetering / articulated heads
• Derived from Fixed Wing
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Deficiencies
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1. Acceleration Response
• Precision Hover• Pilot control of long / lat acceleration
• Attitude change secondary
• Acceleration response essentialto fidelity
• Matched?
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1. Acceleration Response
• FSTD(H) 2.b.(3):
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X
X
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1. Acceleration Response
• Lack of acceleration test• Critical response not matched
• Difficult to maintain position
• “Nobody can hover the simulator”• Changed control strategy
• Reduced training effectiveness
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2. Tolerance Size
• Current tolerances OK for Teetering / articulated• Poor for rigid / semi-rigid
• FSTD(H) 2.b.(1):
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2. Tolerance Size
• Sideways flight, 5% Hinge Offset• Tolerance = 75% of Longitudinal / Lateral variation from hover to 42 kts
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G/S LON % LAT % PED % COLL %
±5 % ±5 % ±5 % ±5 %
0 40.5 51.6 60.7 54.9
20 39.5 54.3 64.1 58.2
32 40.8 58.4 69.2 53.5
42 46.2 58.3 73.4 50.8
Variation 6.7 6.7 12.7 7.4
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2. Tolerance Size
• Large mismatch allowed• Trends corrupted
• Control by “feel” impaired
• Negative training• IFR
• Cat A
• Engine Off Landings
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3. Optional Tolerances
• Standards allow for % or absolute tolerances
• But - no guidance on minimum aircraft response• Lateral control response:
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3. Optional Tolerances
• Hover, Lateral response• Tolerance = ±10% or ±30
• 85% of aircraft response
• Model inaccuracy could be significant
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Target Measured
Roll 3.53 4.66
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4. Mission Tasks
• Take off / Landing:• Tight tolerance on Tq, large tolerance on controls
• Modified control strategy to match Tq – value?
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5. Other issues……
• Input sizes & rates• ERGA – “Collective step inputs”• Adverse / Proverse yaw – “Moderate cyclic input rate”• Autorotational Entry – “…..a rapid power reduction to idle”
• Systems testing• “FFS….Systems shall be operative to the extent that normal, abnormal, and
emergency operating procedures appropriate to the simulator application can be accomplished ”
• “Accurate replication of helicopter systems functions should be checked at each flight crew member position ”
• Sufficient for integrated FMS / PBN / HTAWS / SVS / EFVS / Radar?
• No AFCS Actuator positions
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Suggested changes
• Low speed control response
• Trimmed Flight Control Positions
• Forward flight control response
• Mission Tasks
• Systems
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Low Speed Control Response
• Lateral & Longitudinal acceleration tests• Step acceleration response
• Frequency domain testing
• Mission Task Elements - HQR / SFR• Sidestep
• Accel / decel
• Reposition & hold
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Trimmed Flight Control Positions
• Match suitable datum• Hover position / Min Power position within ± X%
• Match control delta from datum position• Small fixed tolerance (eg 1%) plus
• ±Y% of control delta
• X / Y selected appropriate to Rotor Head
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Trimmed Flight Control Positions
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Aircraft Data
±5% Tolerance
Simulator
“Delta” Tolerance
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Forward Flight Control Response
• Minimum aircraft response to step inputs
• Appropriate to role, eg• Transport / Utility / SAR – 20 deg
• Attack / Recce – 30 deg
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Mission Tasks
• ADS-33 MTE style tests• Autorotation - Pitch / Nr / Airspeed control
• Landing – Position / height capture
• OEI reject – Tq / Speed / Height control
• HQRs / Sim Fidelity Rating Scale
• Tolerances appropriate to role / augmentation
• Define input parameters for Auto Entry test• Lever start / end positions & timescale
• Eg Cruise to MPOG, 1 second
• Nr response
• Open loop pitch / roll• Cross coupling response
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Systems Testing
• Proof of match data from aircraft / integration rig• Menu structures
• Screenshots – FMS, PFD, Navigation screens
• System performance – Weather radar, HTAWS, EFVS etc• EG Video - known location / condition
• Guidance for ATP construction• Method / considerations for system test
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AFCS
• Actuator positions should be provided by default• Imperfect trim states
• Automatic trim systems
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Summary
• Certification Standards could be improved• Precision hover matching
• Application of tolerances
• Assessment of Mission Tasks
• Systems testing
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