Appendix F: FreedomCAR and Vehicle Technologies Program inputs for FY 2008 benefits estimates

Testing of untethered subscale models, often referred to as subscale flight testing, has traditionally had a relatively minor, yet relevant use in aeronautical research and development. As recent advances in electronics, rapid prototyping and unmanned-vehicle technologies expand its capabilities and lower its cost, this experimental method is seeing growing interest across academia and the industry. However, subscale models cannot meet all similarity conditions required for simulating full-scale flight. This leads to a variety of approaches to scaling and to other alternative applications. Through a literature review and analysis of different scaling strategies, this study presents an overall picture of how subscale flight testing has been used in recent years and synthesises its main issues and practical limitations. Results show that, while the estimation of full-scale characteristics is still an interesting application within certain flight conditions, subscale models are progressively taking a broader role as low-cost technology-testing platforms with relaxed similarity constraints. Different approaches to tackle the identified practical challenges, implemented both by the authors and by other organisations, are discussed and evaluated through flight experiments.

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An Open-Source Scale Model Platform for Teaching Autonomous Vehicle Technologies

Sensors ◽

10.3390/s21113850 ◽

2021 ◽

Vol 21 (11) ◽

pp. 3850

Author(s):

Bastien Vincke ◽

Sergio Rodriguez Rodriguez Florez ◽

Pascal Aubert

Keyword(s):

Open Source ◽

Autonomous Vehicles ◽

Autonomous Vehicle ◽

Constrained Systems ◽

Scale Model ◽

Technical Students ◽

Vehicle Technologies ◽

Model Platform ◽

High Level ◽

Time And Energy

Emerging technologies in the context of Autonomous Vehicles (AV) have drastically evolved the industry’s qualification requirements. AVs incorporate complex perception and control systems. Teaching the associated skills that are necessary for the analysis of such systems becomes a very difficult process and existing solutions do not facilitate learning. In this study, our efforts are devoted to proposingan open-source scale model vehicle platform that is designed for teaching the fundamental concepts of autonomous vehicles technologies that are adapted to undergraduate and technical students. The proposed platform is as realistic as possible in order to present and address all of the fundamental concepts that are associated with AV. It includes all on-board components of a stand-alone system, including low and high level functions. Such functionalities are detailed and a proof of concept prototype is presented. A set of experiments is carried out, and the results obtained using this prototype validate the usability of the model for the analysis of time- and energy-constrained systems, as well as distributed embedded perception systems.

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Safety improvements by intelligent connected vehicle technologies: A meta-analysis considering market penetration rates

Accident Analysis & Prevention ◽

10.1016/j.aap.2021.106234 ◽

2021 ◽

Vol 159 ◽

pp. 106234

Author(s):

Guiming Xiao ◽

Jaeyoung Lee ◽

Qianshan Jiang ◽

Helai Huang ◽

Mohamed Abdel-Aty ◽

...

Keyword(s):

Meta Analysis ◽

Connected Vehicle ◽

Market Penetration ◽

Vehicle Technologies

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Taurus - Small launch vehicle technologies development

10.2514/6.1995-3623 ◽

1995 ◽

Author(s):

T Stevens ◽

P Lockwood ◽

J McInerney

Keyword(s):

Launch Vehicle ◽

Vehicle Technologies

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Direct and Indirect Vibro-Acoustic Measurements for Road Noise NVH Predictions

Volume 1: 20th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C ◽

10.1115/detc2005-85633 ◽

2005 ◽

Author(s):

Alessandro Zanarini ◽

Filip De Coninck ◽

Krzysztof Mendrok ◽

Paul Sas

Keyword(s):

Complex Structure ◽

Indirect Measurement ◽

Acoustic Measurements ◽

Road Noise ◽

Indirect Measurements ◽

Direct Measurements ◽

Path Direction ◽

Vehicle Technologies ◽

Structure Measurement ◽

Reverse Path

This paper describes vibro-acoustic direct and indirect measurements for road noise NVH predictions from a complete car. Attention is devoted to the dynamic response of the structure and interior pressure field toward tire patch displacement inputs. The direct measurements exploited the Team Corporation CUBE™ high frequency 6 degree-of-freedom (DOF) shaker recently installed at the KULeuven Vehicle Technologies Laboratory; the input was provided directly at the tire contact patch, while the responses were measured as accelerations and pressures on the structure. In the indirect measurements a low-mid frequency volume velocity source (LMFVVS) was used to acoustically excite the structure in the reverse path direction from the inside of the interior car cavity, while accelerations on the car and forces/torques where acquired by a 6-DOF dynamometer at the tire patch. From both types of excitations Frequency Response Functions (FRF) were calculated in the frequency range [0–500 Hz]. The non-linearity of the full car system was investigated with different direct and indirect measurement tests, in order to assess the feasibility of the reciprocity principle in such a complex structure. Measurement set-ups, results and comparisons are described and discussed in detail.

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