arrow_back_ios

Main Menu

See All Acoustic End-of-Line Test Systems See All DAQ and instruments See All Electroacoustics See All Software See All Transducers See All Vibration Testing Equipment See All Academy See All Resource Center See All Applications See All Industries See All Insights See All Services See All Support See All Our Business See All Our History See All Our Sustainability Commitment See All Global Presence
arrow_back_ios

Main Menu

See All Actuators See All Combustion Engines See All Durability See All eDrive See All Production Testing Sensors See All Transmission & Gearboxes See All Turbo Charger See All DAQ Systems See All High Precision and Calibration Systems See All Industrial electronics See All Power Analyser See All S&V Hand-held devices See All S&V Signal conditioner See All Test Solutions See All DAQ Software See All Drivers & API See All nCode - Durability and Fatigue Analysis See All ReliaSoft - Reliability Analysis and Management See All Test Data Management See All Utility See All Vibration Control See All Acoustic See All Current / voltage See All Displacement See All Load Cells See All Pressure See All Strain Gauges See All Torque See All Vibration See All LDS Shaker Systems See All Power Amplifiers See All Vibration Controllers See All Accessories for Vibration Testing Equipment See All Training Courses See All Articles See All Acoustics See All Asset & Process Monitoring See All Custom Sensors See All Data Acquisition & Analysis See All Durability & Fatigue See All Electric Power Testing See All NVH See All Reliability See All Smart Sensors See All Vibration See All Weighing See All Automotive & Ground Transportation See All Calibration See All Installation, Maintenance & Repair See All Support Brüel & Kjær See All Release Notes See All Compliance See All Our People
arrow_back_ios

Main Menu

See All CANHEAD See All GenHS See All LAN-XI See All MGCplus See All Optical Interrogators See All QuantumX See All SomatXR See All Accessories See All BK Connect / Pulse See All API See All Microphone Sets See All Microphone Cartridges See All Acoustic Calibrators See All Special Microphones See All Microphone Pre-amplifiers See All Sound Sources See All Accessories for acoustic transducers See All Experimental testing See All Transducer Manufacturing (OEM) See All Accessories See All Non-rotating (calibration) See All Rotating See All CCLD (IEPE) accelerometers See All Charge Accelerometers See All Impulse hammers / impedance heads See All Cables See All Accessories See All Electroacoustics See All Noise Source Identification See All Environmental Noise See All Sound Power and Sound Pressure See All Noise Certification See All Industrial Process Control See All Structural Health Monitoring See All Electrical Devices Testing See All Electrical Systems Testing See All Grid Testing See All High-Voltage Testing See All Vibration Testing with Electrodynamic Shakers See All Structural Dynamics See All Machine Analysis and Diagnostics See All Calibration Services for Transducers See All Calibration Services for Handheld Instruments See All Calibration Services for Instruments & DAQ See All On-Site Calibration See All Resources See All Software License Management

Next generation aircraft: Composite structures research with optical strain gauges

Japan Aerospace Exploration Agency, japan

Introduction

The Japan Aerospace Exploration Agency (JAXA) has relied on HBK’s data acquisition technology to investigate the structural health of recently developed aircraft made with composite materials. The research looked at the development of small to medium-sized jet passenger planes and was undertaken by JAXA as part of a collaborative project with the Tokyo Metropolitan Government and the Tokyo Metropolitan University (TMU).

chevron_left
chevron_right

HBK’s optical strain gauge systems were first used to undertake the structural testing of the ATD’s canard wing design by applying variable loads to the wing using a hydraulic actuator. One of the aims of the project was to monitor the effects of impact damage on the canard wing using 18-channel optical strain gauges. Researchers are also focusing on the development of a Health Monitoring System (HMS) for new wing structures using optical strain gauges.

The decision to utilize optical strain gages, as opposed to mechanical devices, was to minimize the possibility of any risk of explosion while ensuring that electromagnetic effect (EME) concerns did not impact on the results. A total of 20 optical strain gages were distributed on the wing to give the coverage needed for the stress calculations.

Researchers working on the project were able to save a significant amount of time in fitting the optical strain gauges with HBK’s patch over the time taken to fit standard mechanical strain gauges. The optical strain gauges are suitable for both dynamic and static tests on the structure.

In addition researchers used HBK's MGCplus in combination with three of HBK’s DI410 optical strain gauge interrogators. These are 4-channel devices with a capacity of up to 1,000 measurements/sec. Two of HBK’s M416 multiplexers were also used for connecting up to 320 optical measuring points to provide fully synchronized measurement in real time. Data capture and analysis was carried out with HBK’s catman Enterprise software connected to all the devices.

JAXA’s research focused on both developing the advanced composite structures as well as the smart technology for this next generation of aircraft. In parallel with JAXA’s research, the TMU undertook research into likely future avionics developments. The research involved two phases, both of which utilized HBK’s equipment for the testing regime. The first phase, which was undertaken in 2011, developed an Advanced Technology Demonstrator (ATD) as a business jet for up to 8 passengers. The second phase, which took place during 2012, looked at developing a regional jet for 120 passengers. Following the success of the tests on the ATD’s canard wing, a bigger composite structure for a wing in the region of 5 m long was built and static tests undertaken to examine the integrity of the fuel tanks that are located in the aircraft’s main wing. Both aircraft feature specially developed advanced carbon fiber reinforced laminates (CFRP). The high impact resistant laminates are reinforced by Vectran fiber through-the-thickness stitching to reduce any loss of structural strength through delamination.

JAXA

The Japan Aerospace Exploration Agency (JAXA) was born through the merger of three institutions, namely the Institute of Space and Astronautical Science (ISAS), the National Aerospace Laboratory of Japan (NAL) and the National Space Development Agency of Japan (NASDA). It was designated as a core performance agency to support the Japanese government's overall aerospace development and utilization. JAXA, therefore, can conduct integrated operations from basic research and development, to utilization.

More about JAXA

Technology Used

Related Case Studies