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Aermacchi M346 Advanced Trainer20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Test ActivitiesEnvironmental Qualification for Airborne Black Boxes20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Environmental Qualification for Airborne Black BoxesTEST PURPOSE:Cover the Preliminary Safety of Flight mechanical requirementsfor black boxes manufactured by AerMacchi following the testsprocedure:• Vibration (Functional and Endurance Test)• Mechanical Shock (Procedure I)As per MIL-STD-810E and M346 requirements20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Environmental Qualification for Airborne Black BoxesFunctional and Endurance LevelFFFFPSD Point1:+ZPSD Point2:+ZPSD Point3:+ZPSD Point4:+Z(g 2 /Hz)Accelerometers response [g rms]Hz20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Environmental Qualification for Airborne Black BoxesOBTAINED RESULTS:Using the following LMS Test.Lab modules:• LMS Environmental (Sine, Random and Shock control)• LMS Desktop• LMS Structures (Modal Analysis and Cada-X T.Mon)it was possible to perform the required tests and fulfils theSafety of Flight mechanical requirements for all the airborneblack boxes20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Test ActivitiesFatigue Test Simulating Buffet Conditions20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Fatigue Test Simulating Buffet ConditionsBUFFET:Aeroelastic structural response due to unsteady aerodynamicinputTEST PURPOSE:Provide for Horizontal Tail, the clearance for the first prototypeinitial flight testing activities;Investigate its fatigue strength capability simulating loadspectra for one equivalent flight lifetime.20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Fatigue Test Simulating Buffet ConditionsSimulating the RealityControl RoomTest Set-UpDynamically representativestiffness rod20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Fatigue Test Simulating Buffet ConditionsSimultaneously excitation of two different vibration modes:• First Bending (Shaker n.1)• Rigid Rotation (Shaker n.2)20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Fatigue Test Simulating Buffet ConditionsOBTAINED RESULTS:Using the following LMS Test.Lab modules:• LMS Spectral Acquisition! Throughput Data File Recording• LMS DesktopIt was defined the input load (simulating the most criticalflight conditions) from the strain gauges andaccelerometers response, this sensor were used also fordetecting and follow the resonance frequency during thetest. At the end of the test a more deep knowledge of theHorizontal Tail structure and constrain behaviour wasachieved.20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Test ActivitiesInertial Platform “Modal Installation Testing”20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Inertial Platform “Modal Installation Testing”TEST PURPOSE:Measure the Inertial Platform dynamic characteristics withrespect to the supporting frame, in order to verify theinstallation stiffness requirements.20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Inertial Platform “Modal Installation Testing”Acquisition and Real TimeLevel Response MonitoringFRF Point2:+Z/Point16:-ZFRF Point3:+Z/Point16:-ZFRF Point5:+Z/Point16:-ZFRF Point6:+Z/Point16:-ZFRF Point8:-Z/Point16:-ZFRF Point10:-X/Point16:-ZFRF Point11:-Y/Point16:-ZFRF Point12:+X/Point16:-ZFRF Point13:+Y/Point16:-ZFRF Point14:-X/Point16:-ZFRF Point4:-Z/Point16:-Z(g/N)Control PanelHz20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Inertial Platform “Modal Installation Testing”Post Analysis Modal Shape(Use of Slave degree of freedom)20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Inertial Platform “Modal Installation Testing”OBTAINED RESULTS:Using the following LMS Test.Lab modules:• LMS Spectral Acquisition! Throughput Data File Recording• LMS Desktop• LMS Modal Analysisthe inertial platform installation natural frequencies (andmode shape) were evaluated along each of the A/C axeswith respect to the supporting frame to meet FlightControl System requirements20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Test ActivitiesReal Time Monitoring During Flight Test20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Real Time Monitoring During Flight TestsTEST PURPOSE:Substantiate the mathematical model forecast during first seriesof flutter test flights and manage possible critical phenomenafor flight safety20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Real Time Monitoring During Flight Tests20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Real Time Monitoring During Flight TestsCustomized graphical user interfaceLong or short time slicesdedicated for each flightmanoeuvres, i.e.Flutter or Buffet20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Real Time Monitoring During Flight TestsOBTAINED RESULTS:Using the following LMS Test.Lab modules:• LMS Spectral Acquisition! Throughput Data File Recording• LMS Desktop• LMS T.Mon Cada-Xwere monitored the noticeable frequencies (related totheir possible evolution). First flights safety has beencleared.20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

Test Improvement Using LMS System20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

TEST IMPROVMENT USING LMS SYSTEMAdvantages:– One front-end (4 PQFA and 1VDAC Boards) used for all activities.– Easy data transfer (Desktop Floating) and reporting– All different modules suitable for use on same Project• Fast analysis performed immediately after the test (SineControl" Modal Analysis)– Environmental modules (Sine, Shock and Random Control) userfriendly, fast and easy both for beginner and expert users– The system keep you away from making unintentional mistake20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA

20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRALesson Learned

LESSON LEARNEDI like to demonstrate how even using only one LMSSystem (and a bit of “common sense”), it is possible toapproach and solve some problems related to theaeronautical world greatly appreciating the resourcesprovided by LMS.Thank you for your attention20 Settembre 2005 AIDAA - XVIII CONGRESSO NAZIONALE - VOLTERRA