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Article

Zhengyu Huang, Lingyu Chen, Lianchao Zhang, Shixun Fan and Dapeng Fan

This paper aims to analyze the key factors influencing the synchronization performance of distributed motion control system and to improve the synchronization performance…

Abstract

Purpose

This paper aims to analyze the key factors influencing the synchronization performance of distributed motion control system and to improve the synchronization performance for peripherals control of this system.

Design/methodology/approach

This paper deals with the software synchronization problems of distributed motion control system based on real-time Ethernet. First, combined with communication and control tasks, the key factors affecting synchronization performance of system are analyzed. Then, aiming at key factors and considering the synchronization of system bus, protocol conversion and task scheduling, a software synchronization method based on CANopen protocol and real-time Ethernet is proposed. Finally, the feasibility of this method is verified by establishing distributed motion control system and testing the synchronization performance of terminal control signals of slaves.

Findings

Based on this method, the results show that the synchronization accuracy for peripherals control of all slaves could be about 100 ns.

Practical implications

This research provides high-precision synchronization method, which could lay a foundation for the application of distributed motion control system in the field of assembly automation, such as multi-axis assembly robots control.

Originality/value

In distributed motion control system, many factors affect the synchronization performance. At present, there is no synchronization method that could comprehensively consider these factors. This paper not only analyzes the key factors influencing the synchronization performance of system but also proposes a synchronization method. Therefore, the method proposed in this paper has certain theoretical value and engineering significance.

Details

Assembly Automation, vol. 39 no. 5
Type: Research Article
ISSN: 0144-5154

Keywords

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Article

THE AT Avonix Corp., Bus Monitor, is in fact much more than a BM as defined by MIL‐STD 1553 Specifications. It is actually a 1553 Data Bus Analyser (Logic Analyser…

Abstract

THE AT Avonix Corp., Bus Monitor, is in fact much more than a BM as defined by MIL‐STD 1553 Specifications. It is actually a 1553 Data Bus Analyser (Logic Analyser philosophy) and Recorder (DBAR), giving a Personal Computer the capability of fast, concise, informative analysis of bus traffic and, as a consequence, insight into the performance of all bus devices.

Details

Aircraft Engineering and Aerospace Technology, vol. 62 no. 6
Type: Research Article
ISSN: 0002-2667

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Abstract

Purpose

To explore people’s attitudes towards bus service quality and bus use.

Methodology/approach

The study is a natural experiment that uses primary data collected from questionnaires, which were conducted to Maltese residents. The information was collected two months before the bus service reform and one year afterwards.

Findings

Results cast doubt on whether current policy measures regarding bus service quality are adequate to contribute to a modal shift from car to bus use.

Practical implications

Provides insight on whether current policy measures are sufficient in order to obtain an increase in bus patronage.

Originality/value

The case study of the Malta bus service reform provides an opportunity to study people’s attitudes in a quasi-experimental situation. Additionally, the research sheds light on the possible impact that bus service reforms have on people’s attitudes.

Details

Sustainable Urban Transport
Type: Book
ISBN: 978-1-78441-615-7

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Article

Chen Kuilin, Feng Xi, Fu Yingchun, Liu Liang, Feng Wennan, Jiang Minggang, Hu Yi and Tang Xiaoke

The data protection is always a vital problem in the network era. High-speed cryptographic chip is an important part to ensure data security in information interaction…

Abstract

Purpose

The data protection is always a vital problem in the network era. High-speed cryptographic chip is an important part to ensure data security in information interaction. This paper aims to provide a new peripheral component interconnect express (PCIe) encryption card solution with high performance, high integration and low cost.

Design/methodology/approach

This work proposes a System on Chip architecture scheme of high-speed cryptographic chip for PCIe encryption card. It integrated CPU, direct memory access, the national and international cipher algorithm (data encryption standard/3 data encryption standard, Rivest–Shamir–Adleman, HASH, SM1, SM2, SM3, SM4, SM7), PCIe and other communication interfaces with advanced extensible interface-advanced high-performance bus three-level bus architecture.

Findings

This paper presents a high-speed cryptographic chip that integrates several high-speed parallel processing algorithm units. The test results of post-silicon sample shows that the high-speed cryptographic chip can achieve Gbps-level speed. That means only one single chip can fully meet the requirements of cryptographic operation performance for most cryptographic applications.

Practical implications

The typical application in this work is PCIe encryption card. Besides server’s applications, it can also be applied in terminal products such as high-definition video encryption, security gateway, secure routing, cloud terminal devices and industrial real-time monitoring system, which require high performance on data encryption.

Social implications

It can be well applied on many other fields such as power, banking, insurance, transportation and e-commerce.

Originality/value

Compared with the current strategy of high-speed encryption card, which mostly uses hardware field-programmable gate arrays or several low-speed algorithm chips through parallel processing in one printed circuit board, this work has provided a new PCIe encryption card solution with high performance, high integration and low cost only in one chip.

Details

Circuit World, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0305-6120

Keywords

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Article

Masoud Azarbik and Mostafa Sarlak

This paper aims to report how one can assess the transient stability of a power system by using stacked auto-encoders.

Abstract

Purpose

This paper aims to report how one can assess the transient stability of a power system by using stacked auto-encoders.

Design/methodology/approach

The proposed algorithm works in a power system equipped with the wide area measurement system. To be more exact, it needs pre- and post-disturbance values of frequency sent from phasor measurement units.

Findings

The authors have investigated the performance of the proposed method. Going through details, the authors have simulated many contingencies, and then have predicted the transient stability in each of which by using the proposed algorithm.

Originality/value

The results demonstrate that the algorithm is fast, and it has acceptable performance under different circumstances including the change of system topology and failures of telecommunication channels.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 39 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

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Article

Piotr Grzybowski, Maciej Klimczuk and Pawel Rzucidlo

This paper aims to describe the idea behind and design of a miniaturized distributed measurement system based on a controller area network (CAN) data bus.

Abstract

Purpose

This paper aims to describe the idea behind and design of a miniaturized distributed measurement system based on a controller area network (CAN) data bus.

Design/methodology/approach

The intention of the designers was to build a light and modular measurement system which can be used in remotely piloted aircraft systems and ultra-light aircraft during flight tests, as well as normal operation. The structure of this distributed measurement system is based on a CAN data bus. The CAN aerospace standard has been applied to the software as well as the hardware comprising this system. PRP-W2 software designed for PCs is an additional component of the proposed measurement system. This software supports data acquisition from a recorder unit and allows for preliminary data analysis, as well as data conversion and presentation.

Findings

The system, complete with a high-speed data recorder, was successfully installed on board of an MP-02 Czajka aircraft. A research experiment using the system and oriented on airframe high frequency vibration analysis is presented in the final part of this paper.

Research limitations/implications

This measurement system allows analysis of high-frequency vibrations occurring at selected points of the aircraft. A data set is recorded by three-axis accelerometers and gyroscopes at frequencies up to 1 kHz.

Practical implications

The use of a miniature and lightweight modular measurement system will, in many cases, be faster and less expensive than full-scale measurement and data acquisition systems, which often require a lengthy assembly process. The implementation of this class of lightweight flight test systems has many advantages, in particular to the operation of small aircraft. Such solutions are likely to become increasingly common in unmanned aerial vehicles and in other light aircraft in the future.

Originality/value

The adaptation of a distributed measuring system with a high frequency of measurements for purposes of small and miniature aircraft.

Details

Aircraft Engineering and Aerospace Technology, vol. 90 no. 8
Type: Research Article
ISSN: 1748-8842

Keywords

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Article

Merlin Stone and Eleni Aravopoulou

This case study describes how one of the world’s largest public transport operations, Transport for London (TfL), transformed the real-time availability of information for…

Abstract

Purpose

This case study describes how one of the world’s largest public transport operations, Transport for London (TfL), transformed the real-time availability of information for its customers and staff through the open data approach, and what the results of this transformation were. The purpose of this paper is therefore to show what is required for an open data approach to work.

Design/methodology/approach

This case study is based mainly on interviews at TfL and data supplied by TfL directly to the researchers. It analyses as far as possible the reported facts of the case to identify the processes required for open data and the benefits thereof.

Findings

The main finding is that achieving an open data approach in public transport is helped by having a clear commitment to the idea that the data belong to the public and that third parties should be allowed to use and repurpose the information, by having a strong digital strategy, and by creating strong partnerships with data management organisations that can support the delivery of high volumes of information.

Research limitations/implications

This research is based upon a single case study, albeit over an extensive period, so the findings cannot be applied simply to other situations, other than as evidence of what is possible. However, similar processes could be applied in other situations as a heuristic approach to open data strategy implementation.

Practical implications

The case study shows how open data can be used to create commercial and non-commercial customer-facing products and services, which passengers and other road users use to gain a better travel experience, and that this approach can be valued in terms of financial/economic contribution to customers and organisations.

Social implications

This case study shows the value that society can obtain from the opening of data in public transport, and the importance of public service innovation in delivering benefits to citizens.

Originality/value

This is the first case study to show in some detail some of the processes and activities required to open data to public service customers and others.

Details

The Bottom Line, vol. 31 no. 1
Type: Research Article
ISSN: 0888-045X

Keywords

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Article

Peter Leggate and Hilary Dyer

The first article in the series (The Electronic Library, 3, 3, July, 1985 pp. 200–209) introduced the reader to microcomputer terminology and to the main…

Abstract

The first article in the series (The Electronic Library, 3, 3, July, 1985 pp. 200–209) introduced the reader to microcomputer terminology and to the main components—hardware and software—of a microcomputer system. This second article is largely devoted to more detailed description of the main hardware components: processors, internal memory, buses, external memory, printers and communications hardware. The importance of ergonomic factors in vdu and keyboard design is stressed. Multi‐user and network configurations are compared. Finally, the discussion of the role of the operating system, introduced in the first article, is extended.

Details

The Electronic Library, vol. 3 no. 4
Type: Research Article
ISSN: 0264-0473

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Abstract

Details

Handbook of Transport and the Environment
Type: Book
ISBN: 978-0-080-44103-0

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Article

Zeenat Kotval-K

With the growing preference of the generation of ageing baby boomers to age in place, mobility has played an increasingly important role in their continued physical and…

Abstract

Purpose

With the growing preference of the generation of ageing baby boomers to age in place, mobility has played an increasingly important role in their continued physical and mental well-being. As older adults drive less, their ability to travel freely where and when they desire becomes increasingly limited. Consequences of this include the cessation of various activities and services that are necessary for daily living. Transportation immobility is known to negatively impact the quality of life through physical, mental, and social isolation. For any initiative or policy to be put in place, an assessment of the current state of transportation services, specifically for older adults, needs to be carried out. The purpose of this paper is to assess the access to public transit in the Greater Lansing, Michigan region, which has a population density of about 2,042 people per square kilometre, available to ageing adults, especially when they have to stop driving.

Design/methodology/approach

The study uses a spatial approach through the use of geographical information systems to assess the transit infrastructure available for use by older adults in the Greater Lansing region.

Findings

This paper finds a considerable gap in available options and that some of these can be addressed by quite simple actions and initiatives.

Research limitations/implications

Because the data were drawn from the US Census, the spatial analysis is limited to block-level data. The US Census (2011) defines blocks as “statistical areas bounded by visible features such as roads, streams, and railroad tracks, and by nonvisible boundaries such as property lines, city, township, school district, county limits and short line-of-sight extensions of roads”. More detailed geographical data would have enabled a more comprehensive analysis.

Practical implications

This study area is typical of many small towns in the USA and underlines the need for more policy- and community-led transit initiatives to address this critical barrier to optimal ageing.

Originality/value

This paper fulfils an identified need to study the transit infrastructure of a range of urban areas and ascertain whether it currently fulfils mobility needs of older adults who do not drive.

Details

Quality in Ageing and Older Adults, vol. 18 no. 3
Type: Research Article
ISSN: 1471-7794

Keywords

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