ENGR 2310 lecture notes

ENGR 2310 lecture - University of Ontario Institute of Technology Landing Gear Presentation Gary Ataman MBA M Eng P Eng Manager of Product

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: University of Ontario Institute of Technology Landing Gear Presentation Gary Ataman MBA, M. Eng., P. Eng. Manager of Product Improvement Messier Bugatti Dowty 2011 09 28 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 0 The Knack This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 1 Messier Bugatti Dowty Messier Bugatti Dowty (MBD) is part of Safran. Safran is about 60,000 employees strong. We design, manufacture, assemble, test and repair. This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 2 Messier Bugatti Dowty This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 3 Messier Bugatti a World Wide Organization Messier Dowty Dowty Is a World Wide Company http://www.safranmbd.com This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 4 Messier Bugatti a World Wide Organization Messier Dowty Dowty located in Ajax 574 Monarch Avenue Ajax This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 5 Airbus Business Unit A300/A310 A319/A320/A321 A330/A340 A340-500/600 A380 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 6 Boeing and Military Business Unit EADS AGUSTA/WESTLAND AGUSTA/SIAI MARCHETTI ALENIA / AERMACCHI / EMBRAER BAE SYSTEMS BELL / BOEING BOEING CASA DASSAULT AVIATION DENEL EUROCOPTER EUROFIGHTER KAMAN KAI PANAVIA SEPECAT This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 7 Business And Regional Aircraft Business Unit ATR AVRO BELL / AGUSTA BOMBARDIER CASA CASA/IPTN DASSAULT FALCON FAIRCHILD DORNIER EMBRAER FOKKER PIAGGIO RAYTHEON SOCATA This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 8 35,000 Takeoffs and Landings a Day This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 9 Major Milestones Over the Last Year This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 10 Landing - when things go wrong Buffalo DHC-5 landing at air show This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 11 Landing - when things go right Boeing 747 landing in Hong Kong This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 12 Some of the programs we have worked on in the last 10 years This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 13 Some of the programs we have worked on in the last 10 years This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 14 Airbus A340 - 600 Build Sequence This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 15 Airbus A380 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 16 Airbus A380 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 17 Airbus A380 NLG Steering Testing in Ajax This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 18 Boeing 787 Main and Nose Landing Gear This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 19 Boeing 787 Main Landing Gear This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 20 F-18 E/F Hornet This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 21 F-18 E/F Hornet This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 22 V- 22 Tiltrotor This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 23 BA-609 MLG This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 24 Bell / Augusta BA-609 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 25 BA-609 at Bell Helicopter Textron This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 26 BA-609 at Bell Helicopter Textron This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 27 BA-609 at Bell Helicopter Textron This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 28 BA-609 at Bell Helicopter Textron Flight Testing This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 29 Bombardier BD100 Continental This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 30 Bombardier BD100 Continental This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 31 Bombardier BD100 Continental This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 32 Bombardier BD100 Continental This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 33 Aircraft Center of Gravity B D 1 0 0 L o n g itu d in a l C G E n v elo p e 40000 38000 Aircraft Weight (lb) 36000 34000 32000 P o rtio n o f e n ve lo p e w h ich g e n e ra te s le s s th a n 1 5 5 0 lb . o n th e n o s e . 30000 28000 26000 24000 22000 20000 1 5 .0 0 % 2 0 .0 0 % 2 5 .0 0 % 3 0 .0 0 % 3 5 .0 0 % 4 0 .0 0 % 4 5 .0 0 % Lo n g itu d in a l C G F u s e la g e Sta tio n (% M AC ) This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 34 Preliminary Work to Position the Landing Gear This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 35 Preliminary Work to Determine the Landing Gear Arrangement This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 36 Preliminary Work to Size the Landing Gear Shock Strut Energy equation (mv2/2) = Force x distance During landing, the shock absorber & tire must absorb the sum of kinetic and potential energy of a/c. This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 37 Preliminary Work to Size the Landing Gear Shock Strut When the wheels touch the ground on landing, dynamic loads are generated as the wheels spinup while shock absorbers are working to dissipate the kinetic energy due to sink speed. This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 38 Other Design factors Landing Case (civil (10fps), military (16fps), aircraft carrier (24 fps)) Space (belly, wing, fuselage, etc.) Airloads (aiding or against) Field conditions (concrete, paved, grass, dirt/sand, obstacles(cables)) Loads in airframe (1.5g, 2 g, 3g or more) Tire loading Brakes Steering Tail hook and catapult launch Fatigue life (80,000 flight cycles or 7000 cycles (military)) Etc. This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 39 Bombardier BD100 Continental A/C 20001 in Montreal Microsoft Word Document This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 40 Major Design Features - Main Landing Gear This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 41 Major Design Features - Main Landing Gear This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 42 Major Design Features MLG Shock Strut MLG SHOCK STRUT This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 43 Major Design Features - Uplock This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 44 MLG Harness and Hydraulic Hose Interface This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 45 MLG Harness and Hydraulic Hose Interface Mock up activities This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 46 MLG Brake, Wheel and Tire This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 47 Major Design Features - NLG Forwa rd This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 48 Major Design Features - NLG This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 49 Major Design Features - NLG This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 50 Design Load Cases CASE SPIN UP SPRING BACK MVR RESERVE ENERGY DRIFT LANDING DYNAMIC BRAKING REVERSE BRAKING TURNING TO RUN WITH ENGINE THRUST T.O. RUN (3PT) BRAKED ROLL 3 PT NOSE WHEEL YAW NOSE WHEEL YAW ENG. THRUST UNSYSM. ENG. THRUST SYM. TOWING (0 DEGREE) TOWING (45 DEGREE) JACKING STEERING TORQUE BOTH TIRES INFLATED VERT (lb) DRAG (lb) SIDE (lb) 10800 8800 0 9600 -7900 0 10800 8600 0 12600 0 0 8700 3500 ±2200 22400 0 0 3000 0 0 4500 0 ±2250 9650 0 0 9000 0 0 10550 0 0 4500 0 ±3600 7200 0 ±2300 5750 0 ±1450 9600 0 0 4500 HORIZ LOAD = 9700 LB 4500 HORIZ LOAD = 4850 LB 6650 HORIZ LOAD = 1650 LB 6000 TORQUE = 18900 LB-IN VAT (in) 2.99 5.19 3.14 13.76 9.81 14.0 8.54 10.50 12.82 12.68 12.98 10.50 12.20 11.52 12.81 10.50 10.50 N/A 10.50 RR (in) N/A N/A N/A N/A 7.76 N/A 8.87 8.54 7.47 7.58 7.32 8.54 7.92 8.26 7.48 8.54 8.54 N/A N/A This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 51 Model gear and apply load cases to the gear structure This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 52 Finite Element Analysis of individual parts This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 53 Major Design Features - NLG Doors Moments This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 54 Major Design Features - NLG Doors Pin (1/4”) M.S. = 1.59 (Bend & Shr) (no sideslip, gear ext. @250 kts) Link M.S. = 0.18 (Lug) (10 deg sideslip gear ext. @250 kts) Pin (3/8”) M.S. = 0.23 (Bend & Shr) (10 deg sideslip, gear ext. @ 250 kts) Rod M.S. >2 (no sideslip gear ext. @ 250 kts) Pin (1/4”) M.S. = 0.64 (Bend & Shr) (10 deg. Sideslip, gear ext. @ 250 kts) Rod M.S. = 1.22 (Lug) (10 deg. Sideslip gear ext. @ 250 kts) Swivel (3/8”) M.S. = 1.56 (Bend & Shr) (10 deg. Sideslip gear ext. @ 250 kts) This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 55 Major Design Features - NLG Shimmy NLG Shimmy Performance The current preliminary analysis demonstrates that the NLG does not exhibit any shimmy with the following assumptions Infinite A/C attachment stiffness 8x5.5 8pr bias tire inflated to 78 psig Gas spring inflation pressure of 185 psig Input disturbance of 3 degrees Strokes of 2.5 and 9.5 inches Speeds ranging from 20 to 234 knots (180*1.3=234) With and without 0.5 degrees of free-play Provisions will be made to allow for the addition of a shimmy damping control device This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 56 NLG Shimmy Performance Problems March 25, 03 20001 F346 NLG Shudder Man Rev Landing March 25, 2003 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 57 NLG Shimmy Performance Solutions April 24, 03 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 58 Steering Control Schematic Aircraft 28 VDC Power Supply Pressure from Landing Gear Selector Valve Down Port when Gear is selected Down Return PBA Aircraft Hydraulic System 3000 psi. Steering Control Unit Steering Mechanism Compensator Handwheel Control Unit Rudder Pedal Part of Built-InTest Shock Strut Steering Selector Valve Driver Steering Selector Valve PSEU Steering Collar Rotation Servo-amp NLG Down & Locked Input Signal Processing & Built In Test L V D T WOW Electro-Hydraulic Servo Valve Pressure Switch Steering Actuator / Rack and Pinion +/- 65 Deg. Full Travel +/- 7 Deg. Via Rudder Nosewheel Rotation +/- 65 Deg. Full Travel +/- 7 Deg. Via Rudder Hydraulic Manifold RDC NOSE STEER FAIL FDR EICAS Part of Input Signal Processing Dual Feedback RVT NWS Overtravel Switch NOSE STEER SSV OPEN RS232 Maintenance Interface MICROCONTROLLER MAINTENANCE DISPLAY PSEU This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 59 Hydraulic Schematic of Landing Gear System NOSE LANDING GEAR 1003220001-001 40610-101 (L1003220001) RH. MLG UPLOCK 1003230004-102 40500-102 (L1003211001) CYLINDER I.D.= 1.5000 STROKE= 3.421 x 2 LG SELECTOR VALVE 41220-101 (L1003230005) UNLOCK LOCK C48103 J1 J2 -4 C48102 -4 (P TO C1) (C2 TO R) (P TO C2) (C1 TO R) 135 LOHMS (REF.) C45201 -6 135 LOHMS -8 C1 DOWN C48104 -8 AD -4 SEQUENCING CANISTER 1003230007-001 41160-101 (L1003230007) Vswept= 2.0 in 3 (REF.) -4 P -8 P -4 NOSE LANDING GEAR STEERING MANIFOLD -4 C -4 R -8 C45202 C2 -8 UP -8 1C3308(601R75153-5) VD -4 -6 -6 -4 -8 -6 -6 AU VU -6 R -6 -8 -4 -4 -8 -4 -4 -6 -4 C41204 C -4 -4 -6 -6 -4 -4 -6 -4 DUMP VALVE AND MANUAL SELECTOR VALVE ASSY. 41360-101 (L1003234003) -6 P R HYDRAULIC SYSTEM NO.2 R -4 P -4 -6 -8 -4 -4 DOWN NLG DRAG BRACE 40900-101 (L1003220001) (REF.) 1C3304 (601R75153-1) (INTEGRAL WITH 41360-101) P -4 R C41205 -4 HYDRAULIC SYSTEM N0.1 -8 C41207 CYLINDER I.D.= 1.116 PISTON O.D.= .873 STROKE= .525 R -8 RUN-AROUND & DUMP VALVE MLG 41330-101 (L1003234003) R STEERING SELECTOR VALVE (L1003250003) P -8 DOWN STEERING EHSV -6 R -8 R C41206 (REF.) -4 P P -8 UP CYLINDER I.D.= 3.378 PISTON O.D.= 2.371 STROKE= 21.6 ASSUME 10.0 TO 12.0 SECONDS TO FULLY RETRACT OR EXTEND LANDING GEARS C55201 -8 PRESSURE SW ITCH (L1003250004) SEL B DOWN C41203 GEAR DOWN RH SIDE BRACE ACTUATOR 40300-101 (L1003211001) SEL A UP CYLINDER I.D.= 0.925 PISTON O.D.= 0.435 STROKE = 0.450 ASSUME 7 SECONDS TO FULLY STEER END TO END -4 -8 C UP UNLOCK (REF.) LH SIDE BRACE ACTUATOR 40300-101 (L1003211001) -4 -4 CYLINDER I.D.= 2.243 PISTON O.D.= 1.123 STROKE = 8.509 CYLINDER I.D.= 3.378 PISTON O.D.= 2.371 STROKE = 21.6 GEAR DOWN RESTRICTION (L1003230010) C42103 UP -6 -4 -4 -4 DOWN NLG RET. ACTUATOR 40700-101 (L1003220001) C42104 LOCK CYLINDER I.D.= 1.202 PISTON O.D.= 0.4994 STROKE = 0.3995 (REF.) -4 -4 NLG UPLOCK 1003230003-001 40800-101 (L1003220001) LOCK -4 -4 UNLOCK MANUAL RELEASE SYSTEM S1003234001 41300 (PULL TO MRS MODE) (REF.) LH. MLG UPLOCK 1003230004-001 40500-101 (L1003211001) CYLINDER I.D.= 0.925 PISTON O.D.= 0.435 STROKE = 0.450 (REF.) -4 AUXILIARY EXTEND ACTUATOR RH MLG 1003230003-001 40250-101 (L100321001) CYLINDER I.D.= 1.565 PISTON O.D.= 0.747 STROKE = 3.983 AUXILIARY EXTEND ACTUATOR ASSY. LH MLG 1003230003-001 40250-101 (L100321001) (REF.) UNLOCK BD-100 LGS HYDRAULIC SCHEMATIC FLIGHT TEST PARAMETER INSTRUMENTATION - PRESSURE TRANSDUCERS AND FLOWMETER LOCATIONS Prelimnary Issue GEAR DOWN -4 -4 GEAR DOWN C46201 DATE: JULY 16, 1999 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 60 Manual (Emergency) Release Mechanism This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 61 Manual (Emergency) Release Mechanism Performance L oa d (lb s ) MRS Handle Load Diagram 35.000 30.000 25.000 20.000 15.000 10.000 5.000 0.000 0.00 0.06 0.30 0.90 1.50 2.10 2.70 3.30 3.90 4.50 5.10 Stroke (in) This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 62 MRS Hydraulic Valve Actuation MLG LEVER, VALVES AND MLG UPLOCK CABLE This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 63 Runaround and Dump Hydraulic Valve This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 64 Landing Gear Cockpit Retr./Extension Control Handle This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 65 Landing Gear Control Schematic This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 66 Brake Control Control Schematic This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 67 Brake Control Control Schematic Control Laws This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 68 Cold Weather Flight Testing – Churchill January 2003 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 69 Safety of First Flight Testing Safety of Flight Requirements Drop Testing Main and Nose Landing Gear Static Spring Curve All limit drop test cases Static Strength Test, Nose Landing Gear All limit load cases Fatigue Test, no requirements for SOF, one life complete on NLG prior to A/C certification Retraction Extension, Landing Gear System 1000 retract / extend cycles Alternate Extension, Manual Release System All cycles in advance of first flight Nose wheel steering system test Brake Control testing Brake/Wheel/Tire testing This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 70 787 NLG Drop Testing This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 71 Landing Gear System Test Rig (LGSTR) Landing Gear System Test Rig (LGSTR) Objective To conduct system functional performance, failure simulation, stability and control, and endurance testing. To eliminate or minimize the need for development and certification test in the aircraft To detect design deficiencies in components before entrance into service This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 72 Landing Gear System Test Rig (LGSTR) This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 73 Landing Gear System Test Rig (LGSTR) This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 74 Landing Gear System Test Rig This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 75 Spring Analysis This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 76 Spring Analysis This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 77 Spring Simulation This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 78 Spring Testing This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 79 Spring Testing This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 80 Flight Test Parameters List This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 81 Reliability, Maintainability And Safety PDR Deliverables per CDRD/Master Schedule Dispatch/Mission Reliability Analysis Preliminary System Safety Analysis for Software Justification Fault Tree Analysis FMEA Bird Strike System Effects RMS Program Plan Fire Hazard Analysis FRACAS Plan This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 82 Reliability, Maintainability And Safety Mission/Dispatch Analysis RM-100-290 Mission Reliability Prediction 99.9980% Requirement 99.9846% Dispatch Reliability Prediction 99.9770% Requirement 99.9666% PSSA for Software Justification MD/BA-27 SCU “...microcontroller with its embedded software performs maintenance and fault isolation functions that are independent of the steering control, monitor and cockpit annunciation functions. Anomalous behavior of the embedded software cannot cause the loss or incorrect operation of these functions.” Software Level E, per DO178B This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 83 Reliability, Maintainability And Safety Fault Tree Analysis (FTA) F A I L U R E C O N D IT I O N FH A IT E M # R E Q U IR E D p e r F lig h t H o u r P R E D I C T E D p er F lig h t H o u r U n an n u n c ia te d fa ilu re to e x te n d b o th m a in la n d in g g e a rs o r a ll th ree la n d in g g e ars (F als e d o w n lo c k a n d fa ilu re to e x te n d 3 2 -1 0 -0 1 1 x 1 0 -7 7 .7 2 x 1 0 -1 6 A n n u n c ia te d fa ilu re to ex te n d b o th m a in g e ars o r a ll th re e la n d in g g e a rs 3 2 -1 0 -0 3 1 x 1 0 -7 7 .7 2 x 1 0 -8 C o llap s e o f eith er le ft o r rig h t m a in lan d in g g e a r (In lc u d e s u n c o m m a n d e d re trac tio n ) 3 2 -1 0 -0 4 1 x 1 0 -7 5 .0 6 x 1 0 -1 2 U n an n u n c ia te d fa ilu re to e x te n d a n d lo c k d o w n a n y o n e m a in lan d in g g e a r 3 2 -1 0 -0 5 1 x 1 0 -7 3 .1 3 x 1 0 -1 6 U n an n u n c ia te d fa ilu re to e x en d a n d lo c k d o w n th e n o s e la n d in g g e a r (in clu d es u n c o m m an d e d re tra c tio n ) 3 2 -1 0 -0 6 1 x 1 0 -7 8 .0 6 x 1 0 -1 5 U n co m m a n d e d g e ar ex te n s io n 3 2 -1 0 -0 7 1 x 1 0 -5 /1 x 1 0 -7 3 .9 8 x 1 0 -6 A n n u n c ia te d fa ilu re to ex te n d a n d lo c k d o w n a n y o n e m a in la n d in g g e a r 3 2 -1 0 -0 8 1 x 1 0 -7 2 .8 3 x 1 0 -7 A n n u n c ia te d fa ilu re to ex te n d a n d lo c k d o w n th e n o s e la n d in g g e a r 3 2 -1 0 -0 9 1 x 1 0 -6 8 .0 6 x 1 0 -6 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 84 Reliability, Maintainability And Safety Failure Mode & Effects Analysis (FMEA) No catastrophic single failures identified “Failure to extend” single failures limited to seized/jammed components Inadvertent extension, possible single failure in landing gear selector valve, detailed FMEA to focus on this possibility Bird Strike MD/BA-24 Standard M-DI landing gear design practices, locating sensors/targets, harnesses, brake lines etc. behind structure where possible Metal cover protecting steering feedback linkage This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 85 System Weight Weight Summary ASSEMBLIES WEIGHT EST CALC ACT 40100-101 MAIN LANDING GEAR SYSTEM 532.1 28% 68% 5% 40600-101 NOSE LANDING GEAR SYSTEM 160.4 42% 41% 17% 41100-101 STEERING CONTROL SYSTEM 9.6 0% 100% 0% 41200-101 LANDING GEAR CONTROL HARDWARE 9.5 68% 32% 0% 41300-101 MANUAL RELEASE SYSTEM 21.8 100% 0% 0% LANDING GEAR SYSTEM CURRENT 733.4 33% 60% 7% LANDING GEAR SYSTEM GNTEW 735.0 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 86 BD100 - Another Successful program This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 87 References Currey, N.S., Aircraft Landing Gear Design: Principles and Practice, AIAA 1988 This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 88 Questions? Thanks This document and the information contained are Messier-Dowty property and shall not be copied or disclosed to any third party without Messier-Dowty prior written authorization. 89 ...
View Full Document

This note was uploaded on 12/12/2011 for the course MECH ENG ENGR 2310 taught by Professor Dr.remon during the Fall '11 term at UOIT.

Ask a homework question - tutors are online