In-Flight Testing of MEMS Pressure Sensors for Flight Loads Determination

Raab, Christian; Rohde-Brandenburger, Kai

doi:10.2514/6.2020-0512

Cited by 11 publications

(11 citation statements)

References 13 publications

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“…The flight test program included flight test maneuvers with static loads as well as maneuvers where the load was dynamically changing. A first evaluation of the static flight test maneuvers, trimmed horizontal flight and steady turns, showed that the shear forces measured by the SG and the pressured based measuring system were in good accordance [13]. A second phase of the evaluation of the experimental data dealt with the dynamic flight maneuvers e.g.…”

Section: Focus Of Study: Dynamic Maneuversmentioning

confidence: 99%

“…The main part of the test program consisted of steady maneuvers, such as trimmed wings-level horizontal flights and steady turn maneuvers with different bank angles. These were used for the investigation of steady load conditions presented [13]. All maneuvers were performed at different initial speeds of 100, 120, 160 km/h.…”

Section: Dynamic Test Maneuversmentioning

confidence: 99%

“…A detailed summary of the total flight test program can be found in [13]. It should be mentioned that a maximum load factor of +4 g and a minimum load factor of −0.4 g was achieved with the test maneuvers.…”

Section: Dynamic Test Maneuversmentioning

confidence: 99%

“…1. More details about the calculation of the pressure distributions and a comparison of both methods can be found in [13]. For the analysis of steady load conditions like the trimmed horizontal flight and the constant turn maneuvers, the data processing method was performed on the total averaged measurements of one maneuver time slice.…”

Section: Determination Of Aerodynamic Wing Shear Forces From Pressure Distributionsmentioning

confidence: 99%

“…The evaluation of the shear force based on the optimized XFOIL calculation was not considered for the analysis of the dynamic flight maneuvers, because the model is not able to reproduce realistic aerodynamic flow conditions during high angles of attack. This leads to high inaccuracies in the calculated pressure distributions especially in the leading edge parts of the airfoil [13]. Unsteady flow conditions like e.g.…”

Section: Determination Of Aerodynamic Wing Shear Forces From Pressure Distributionsmentioning

confidence: 99%

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Dynamic flight load measurements with MEMS pressure sensors

Raab

Rohde-Brandenburger

2021

CEAS Aeronaut J

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The determination of structural loads plays an important role in the certification process of new aircraft. Strain gauges are usually used to measure and monitor the structural loads encountered during the flight test program. However, a time-consuming wiring and calibration process is required to determine the forces and moments from the measured strains. Sensors based on MEMS provide an alternative way to determine loads from the measured aerodynamic pressure distribution around the structural component. Flight tests were performed with a research glider aircraft to investigate the flight loads determined with the strain based and the pressure based measurement technology. A wing glove equipped with 64 MEMS pressure sensors was developed for measuring the pressure distribution around a selected wing section. The wing shear force determined with both load determination methods were compared to each other. Several flight maneuvers with varying loads were performed during the flight test program. This paper concentrates on the evaluation of dynamic flight maneuvers including Stalls and Pull-Up Push-Over maneuvers. The effects of changes in the aerodynamic flow characteristics during the maneuver could be detected directly with the pressure sensors based on MEMS. Time histories of the measured pressure distributions and the wing shear forces are presented and discussed.

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Section: Focus Of Study: Dynamic Maneuversmentioning

confidence: 99%

Section: Dynamic Test Maneuversmentioning

confidence: 99%

Section: Dynamic Test Maneuversmentioning

confidence: 99%

Section: Determination Of Aerodynamic Wing Shear Forces From Pressure Distributionsmentioning

confidence: 99%

Section: Determination Of Aerodynamic Wing Shear Forces From Pressure Distributionsmentioning

confidence: 99%

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Dynamic flight load measurements with MEMS pressure sensors

Raab

Rohde-Brandenburger

2021

CEAS Aeronaut J

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A diaphragm secondary stress utilization method for increasing the sensitivity of piezoresistive pressure sensors without sacrificing linearity

Zhang,

Liu,

Wang

et al. 2025

Measurement

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Aerosense: Long-Range Bluetooth Wireless Sensor Node for Aerodynamic Monitoring on Wind Turbine Blades

Polonelli

Deparday

Müller

et al. 2022

J. Phys.: Conf. Ser.

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Predictive maintenance and structural health monitoring are challenging and promising research fields today. In particular, cost-effective and long-term monitoring of wind turbines has been proven to be one of the key elements to successfully increase their efficiency. Accurate numerical modeling and real-time control-in-the-loop play an increasingly prominent role in understanding and optimizing blade aerodynamic and acoustic performances. A non-intrusive and modular measurement system is a prerequisite for long-term measurement campaigns in existing and future wind turbines. Current methods of performing aerodynamic and acoustic field measurements are cumbersome and expensive, leading to a shortage of aerodynamic and acoustic datasets on operating wind turbines. This paper demonstrates the ability of the new Aerosense system to operate successfully in the field. Aerosense is a long-lasting battery-operated and flexible wireless sensor node that can directly measure aerodynamic and acoustic effects on wind turbine blades. It consists of an array of state-of-the-art Micro-Electro-Mechanical Systems (MEMS) sensors, including 40 barometers and 10 microphones, combined with an ultra low power system-on-chip with wireless transmission over Bluetooth 5.1. Experimental results demonstrate the possibility of continuously acquiring data for up to four months on a single lithium battery of 8.7 Ah, featuring an absolute accuracy of 10Pa and an audio bandwidth of 6kHz.

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In-Flight Testing of MEMS Pressure Sensors for Flight Loads Determination

Cited by 11 publications

References 13 publications

Dynamic flight load measurements with MEMS pressure sensors

Dynamic flight load measurements with MEMS pressure sensors

A diaphragm secondary stress utilization method for increasing the sensitivity of piezoresistive pressure sensors without sacrificing linearity

Aerosense: Long-Range Bluetooth Wireless Sensor Node for Aerodynamic Monitoring on Wind Turbine Blades

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