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Gripen development

Gripen development. staffan.bogg@saab.se presented at Meeting No. 96 SAE Aerospace Control and Guidance System Committee Hilton Head, SC October 19-21 2005. Wake vortex.

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Gripen development

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  1. Gripen development staffan.bogg@saab.sepresented at Meeting No. 96SAE Aerospace Control and Guidance System CommitteeHilton Head, SCOctober 19-21 2005 SAAB AEROSYSTEMS

  2. Wake vortex • Problem- AoA vanes might sense reduction in AoA/Nz initially at vortex passage- Elevons put in worse positions (compared to a/c without active FCS) • Wake vortex transient reduction functionality- Implemented in OFP R14:6- Detection filter based on current AoA-information- Instant switching to complementary filtered AoA (instead of AoA based primarily on vanes position) at wake vortex detection- Ordinary AoA monitoring (CBIT) bypassed • Flight Test- FQ Level 1 previously proved with filtered AoA- All vortex passages detected and FCS reconfigured to filtered AoA as designed- Flight tests to verify models rather than characteristics- Detection filter behaviour at low level flight (less than 150 ft) with turbulence to be explored SAAB AEROSYSTEMS

  3. New functionality • Improved Maneuver Load Limiting function- New export external stores- Heavier a/c and more aft c.g.- Basic design stores combinations, ”care free” characteristics for all derivatives (nominal weapon release) • Coupled Control functionality- Automatic navigation- Automatic/optimized climb • Enhanced ALT mode- All attitudes (previoulsy limited to pitch angles of +/- 60 deg)- Increased authority (roll rate/nz) at ”unnormal” attitudes- Pilot Activated Fly Up SAAB AEROSYSTEMS

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