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Article
Publication date: 5 October 2015

Roberto Sabatini, Francesco Cappello, Subramanian Ramasamy, Alessandro Gardi and Reece Clothier

The purpose of this paper is to design a compact, light and relatively inexpensive navigation and guidance system capable of providing the required navigation performance (RNP) in…

753

Abstract

Purpose

The purpose of this paper is to design a compact, light and relatively inexpensive navigation and guidance system capable of providing the required navigation performance (RNP) in all phases of flight of small unmanned aircrafts (UA), with a special focus on precision approach and landing.

Design/methodology/approach

Two multi-sensor architectures for navigation and guidance of small UA are proposed and compared in this paper. These architectures are based, respectively, on a standard extended Kalman filter (EKF) approach and a more advanced unscented Kalman filter (UKF) approach for data fusion of global navigation satellite systems (GNSS), micro-electro-mechanical system (MEMS)-based inertial measurement unit (IMU) and vision-based navigation (VBN) sensors.

Findings

The EKF-based VBN-IMU-GNSS-aircraft dynamics model (ADM) (VIGA) system and the UKF-based system (VIGA+) performances are compared in a small UA integration scheme (i.e. AEROSONDE UA platform) exploring a representative cross-section of this UA operational flight envelope, including high-dynamics manoeuvres and CAT-I to CAT-III precision approach tasks. The comparison shows that the position and attitude accuracy of the proposed VIGA and VIGA+ systems are compatible with the RNP specified in the various UA flight profiles, including precision approach down to CAT-II.

Originality/value

The novelty aspect is the augmentation by ADM in both architectures to compensate for the MEMS-IMU sensor shortcomings in high-dynamics attitude determination tasks. Additionally, the ADM measurements are pre-filtered by an UKF with the purpose of increasing the ADM attitude solution stability time in the UKF-based system.

Details

Aircraft Engineering and Aerospace Technology: An International Journal, vol. 87 no. 6
Type: Research Article
ISSN: 0002-2667

Keywords

Book part
Publication date: 26 June 2024

Valentina Cucino, Rosangela Feola and Andrea Piccaluga

In the current context of increasing awareness about dramatic societal challenges, a growing number of businesses, including both small enterprises and large corporations, are…

Abstract

In the current context of increasing awareness about dramatic societal challenges, a growing number of businesses, including both small enterprises and large corporations, are increasingly embracing more socially oriented behaviors and aligning their innovative strategies and business models to address specific societal needs. Widespread expectations toward more inclusive and sustainable forms of entrepreneurship are determining the need to prioritize objectives toward individuals, society, and stakeholders, beyond mere profit. This study advocates a human-centered perspective in entrepreneurial theory, recognizing human capital’s relevance in the contemporary economic landscape.

Employing a qualitative approach, the authors investigated 17 Italian innovative start-ups with a strong social orientation. Through the Gioia methodology, the authors examined the antecedents of three dimensions within the humane entrepreneurship framework – Sustainable Orientation, Entrepreneurial Orientation, and Human Resources Orientation – and their role in fostering Humane Entrepreneurial Orientation. Innovative start-ups’ outcomes reveal that three antecedents – namely, prior engagement in voluntary activities, connections within the local community, and adept relational skills – exert influence on the development of humane entrepreneurship.

Book part
Publication date: 26 June 2024

Rossella Canestrino, Pierpaolo Magliocca and Marek Ćwiklicki

Global environmental and social threats challenge humans’ well-being and the survival of posterity. Industry 4.0 (I4.0) transformed the industry sector, enabling process…

Abstract

Global environmental and social threats challenge humans’ well-being and the survival of posterity. Industry 4.0 (I4.0) transformed the industry sector, enabling process automation and scalability, increasing manufacturers’ productivity, efficiency, and profitability, and supporting manufacturing innovation and firms’ competitive advantage. Despite this, the I4.0 paradigm, as currently conceived, does not fit for purpose in the context of the climate crisis and planetary emergency, nor does it address deep social tensions.

Therefore, a new revolution focusing on human and environmental needs is strongly required to address society’s economic and social problems. Combining digitalization and social purposes may address local, national, and international issues by involving a human-centered perspective in traditional business-oriented entrepreneurship.

Depending on the above, this chapter provides an in-depth understanding of Digital Entrepreneurship (DE), Digital Social Entrepreneurship (DSE), and how entrepreneurs may employ digital technologies to reach business and social aims.

Article
Publication date: 19 October 2018

Teresa Donateo and Roberto Totaro

The purpose of this paper is to analyze real-world flight data of a piston engine training aircraft collected from an internet-based radar service, along with wind data provided…

195

Abstract

Purpose

The purpose of this paper is to analyze real-world flight data of a piston engine training aircraft collected from an internet-based radar service, along with wind data provided by a weather forecast model, and to use such data to design a hybrid electric power system.

Design/methodology/approach

The modeling strategy starts from the power demand imposed by a real-world wind-corrected flight profile, where speed and altitude are provided as functions of time, and goes through the calculation of the efficiency of the powertrain components when they meet such demand. Each component of the power system and, in particular, the engine and the propeller, is simulated as a black box with an efficiency depending on the actual working conditions. In the case of hybrid electric power system, the battery charging and discharging processes are simulated with the Shepherd model.

Findings

The variability of power demand and fuel consumption for a training aircraft is analyzed by applying the proposed methodology to the Piper PA-28-180 Cherokee, a very popular aircraft used for flight training, air taxi and personal use. The potentiality of hybridization is assessed by analyzing the usage of the engine over more than 90 flights. A tentative sizing of a hybrid electric power system is also proposed. It guarantees a fuel saving of about 5%.

Originality/value

The scientific contribution and the novelty of the investigation are related to the modeling methodology, which takes into account real-world flight conditions, and the application of hybridization to a training aircraft.

Details

Aircraft Engineering and Aerospace Technology, vol. 91 no. 2
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 6 July 2023

Suneel Kumar, Varinder Kumar, Isha Kumari Bhatt, Sanjeev Kumar and Kamlesh Attri

This article analyzes research on digital transformation in the tourism sector, providing insights into leading work, authors, journals, trends and future research opportunities…

1143

Abstract

Purpose

This article analyzes research on digital transformation in the tourism sector, providing insights into leading work, authors, journals, trends and future research opportunities. However, limited in-depth research exists on this topic, and the existing studies lack an understanding of its development, scope and relevant areas.

Design/methodology/approach

The study utilized the Scopus database to identify 61 articles on digital transformation in the tourism sector. The research employed VOSviewer software to analyze publication and citation structure, incorporating bibliometric variables like co-authorship, co-citation network, keywords co-occurrence network and bibliographic coupling.

Findings

The study yielded valuable insights from top-cited articles, revealing their contributions to digital transformation in tourism research. It also highlighted publication trends and the impact of authors, journals and studies and conducted co-occurrence, co-authorship and bibliographic analyses to identify key trends and issues in the tourism sector. The study calls for further examination of the digital revolution in tourism research and outlines future opportunities for researchers in this area.

Research limitations/implications

To enhance the comprehensiveness of data collection, it is recommended that researchers consider including publications from databases such as WOS (Web of Science), Dimensions and PubMed in addition to the Scopus database. This broader inclusion of sources can provide different network structures and valuable insights from the field of digital transformation in the tourism sector.

Originality/value

The research provides substantial value to the study of digital transformation in tourism by focusing on bibliometric data from the Scopus database for the period from 2017 to 2022. By analyzing this data, it identifies significant trends in digital transformation within tourism research. Additionally, the study uncovers new areas of digitization in the tourism sector, further enhancing its value and relevance.

Details

Journal of Hospitality and Tourism Insights, vol. 7 no. 3
Type: Research Article
ISSN: 2514-9792

Keywords

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