On subscale flight testing : Cost-effective techniques for research and development

Rueda, Alejandro Sobrón

doi:10.3384/diss.diva-175520

Cited by 2 publications

(2 citation statements)

References 78 publications

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“…The final design was a pair of horizontal metal holders instrumented with strain-gauges. Unfortunately after installation it was discovered that the thermal expansion of the engine influenced the measurements too much [9].…”

Section: E Thrust Measurement Of Miniature Enginesmentioning

confidence: 99%

Design and testing of an in-flight thrust measurement system for a pylon-mounted miniature jet engine

Bartasevicius

Fleig

Metzner

et al. 2022

AIAA SCITECH 2022 Forum

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Optimization of aircraft's performance often requires careful consideration of aerodynamic drag. However, direct measurement of drag of a flying vehicle is not feasible. Therefore, in order to measure the change in drag for different configurations of a flying aircraft, in-flight thrust measurement is necessary, which can consequently be used to derive drag. For this reason, the design of an in-flight thrust measurement system for a pylon-mounted jet engine is presented. The system is based on the trunnion thrust method. The design process is described, including a review of state of the art as well as measurement error consideration. Calibration methods are presented. During the calibration, the thrust root-mean-square error of 0.64 N was observed. The system was flight tested and proved to work reliably in real-life conditions. Finally, the flight test data was used to generate a thrust model based on engine parameters.

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Section: E Thrust Measurement Of Miniature Enginesmentioning

confidence: 99%

Design and testing of an in-flight thrust measurement system for a pylon-mounted miniature jet engine

Bartasevicius

Fleig

Metzner

et al. 2022

AIAA SCITECH 2022 Forum

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“…Flight testing of Unmanned Aerial Vehicles (UAVs) has increased with advancements in microcontroller hardware and sensors, and the ease of integration with tools such as MATLAB/Simulink. Recent UAV flight test campaigns include [89][90][91][92][93][94][95][96][97][98][99], which also include flight testing with incremental type control laws in [100][101][102][103][104]. Subscale flight testing and system identification was performed in [105][106][107][108][109].…”

Section: Introductionmentioning

confidence: 99%

Practical System Identification and Incremental Control Design for a Subscale Fixed-Wing Aircraft

Steffensen,

Ginnell,

Holzapfel

2024

Actuators

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An incremental differential proportional integral (iDPI) control law using eigenstructure assignment gain design is tested in flight on a subscale platform to validate its suitability for fixed-wing flight control. A kinematic relation for the aerodynamic side-slip angle rate is developed to apply a pseudo full state feedback. In order to perform the gain design and assessment, a plant model is estimated using flight test data from gyro, accelerometer, airspeed and surface deflection measurements during sine-sweep excitations. Transfer function models for the actuators and surface deflections are identified both in-flight and on the ground for several different actuators and control surfaces using hall sensor surface deflection measurements. The analysis reveals a large variation in bandwidth between the different types of servo motors. Flight test results are presented which demonstrates that the plant model estimates based on tests with good frequency excitation, high bandwidth actuators and surface deflection measurements can be used to reasonably predict the closed-loop dynamic behavior of the aircraft. The closed-loop flight test results of the iDPi control law show good performance and lays the groundwork for further development.

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On subscale flight testing : Cost-effective techniques for research and development

Abstract: Along this journey, some of my fellow PhD students have become true friends and have given me unforgettable memories.

Cited by 2 publications

References 78 publications

Design and testing of an in-flight thrust measurement system for a pylon-mounted miniature jet engine

Design and testing of an in-flight thrust measurement system for a pylon-mounted miniature jet engine

Practical System Identification and Incremental Control Design for a Subscale Fixed-Wing Aircraft

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