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Article
Publication date: 6 August 2020

Liqin Zhou, Changbin Wang, Lin Li, Chengxi Zhang, Dalei Song and Chong Li

A novel fault-tolerant control (FTC) method is proposed to assure the stability of the remote-operated vehicle (ROV) by considering the thruster failure-induced model…

Abstract

Purpose

A novel fault-tolerant control (FTC) method is proposed to assure the stability of the remote-operated vehicle (ROV) by considering the thruster failure-induced model perturbations. The stability of the ROV with failures is guaranteed and optimized with the determined model perturbation set. The effectiveness of the double-boundary interval fault-tolerant control (DBIFTC) is verified through the experiments and proves that the stability is well maintained, which demonstrates a decent performance.

Design/methodology/approach

This paper studies a control problem for a multi-vector propulsion ROV by using the DBIFTC method in the presence of thruster failure and external disturbances. The ROV kinematics and dynamical models with multi-vector-arranged thruster failure are investigated and formulated for control system design.

Findings

In this paper, the authors address the FTC problem of ROV with multi-vector thrusters and propose a DBIFTC scheme. The advantage is that as the kinematic system model of ROV is preanalyzed and identified, the DBIFTC becomes more effective. The mathematical stability of the system under the proposed control scheme can be guaranteed.

Research limitations/implications

The ROV model used in this paper is based on the system identification of experimental data. Although this model has real experimental value and physical significance, the accuracy can be further improved.

Practical implications

Cable-controlled underwater ROVs are widely used in military missions and scientific research because of their flexibility, sufficient load capacity and real-time information transmission characteristics. The DBIFTC method proposed in this paper can effectively reduce the problem of underwater vehicle under propeller failure or external disturbance and save unnecessary cost.

Social implications

The DBIFTC method proposed in this paper can ensure the attitude stability of ROV or other underwater equipment operating in the event of propeller failure or external disturbance. In this way, the robot can better perform undersea work and tasks.

Originality/value

The kinematics and failure mechanisms of the ROV with multi-vector propulsion system are investigated and established. An optimized DBIFTC scheme is investigated to stabilize ROV yaw attitude under the thruster failure condition. The feasibility and effectiveness of the DBIFTC is experimentally validated.

Details

Industrial Robot: the international journal of robotics research and application, vol. 48 no. 1
Type: Research Article
ISSN: 0143-991X

Keywords

Expert briefing
Publication date: 10 March 2017

Belarus is defying Russia with varying success. It has scored a win by securing aircraft purchases rather than handing over air bases, but is hamstrung by oil and gas disputes…

Expert briefing
Publication date: 25 August 2021

Just as Zelensky's July 2019 phone call with then President Donald Trump was fading from memory, Biden's green light for the Nord Stream 2 pipeline project, in a deal with…

Details

DOI: 10.1108/OXAN-DB263693

ISSN: 2633-304X

Keywords

Geographic
Topical
Expert briefing
Publication date: 16 May 2018

US interest in Central Asia, particularly Uzbekistan and Kazakhstan, appears to be rising after several years of declining engagement. The two major Central Asian states…

Book part
Publication date: 13 December 2010

Heidi Ross, Ran Zhang and Wanxia Zhao

This chapter examines the changing state–university–student relationships in post/socialist China since the late 1980s. We begin with an introduction to four salient themes in…

Abstract

This chapter examines the changing state–university–student relationships in post/socialist China since the late 1980s. We begin with an introduction to four salient themes in scholarship on Chinese post/socialism that are highly relevant to higher education: globalization, gradualism, civic society, and a critique of holism. These themes help us explain interrelated educational trends that affect the state–university–student relationship: the globalization, “massification,” and stratification of higher education; the redefined role of the state in university governance and management; higher education marketization and privatization; and the quest for meaning and (e)quality in and through higher education. Our general argument is that during the “socialist” period the main relationship central to higher learning was between the state and students. Universities were agents of the state; from a legal point of view, indeed, universities did not have an independent status from the state. In the “post-socialist” era the university–student relationship has become more significant. We examine this reconfiguration through two case studies, one on the development of college student grievance and rights consciousness, and the other on reforms in higher education student services administration. When looked at from the point of view of the state, we see that appropriation and implementation of policies and regulations shaping student rights and services are in partial contradiction with state policies to accelerate economic growth and bolster party authority. From the point of view of universities, we see institutions grappling with how to deliver on forward-looking structures and actions while navigating between the state's policy mandates and growing expectations and demands of its student and business stakeholders. From the point of view of students, we see how constrained agency, uncertainty, and the power of the credential motivates social praxis. At all levels of the state–institution–student relationship actors are employing a kind of pragmatic improvisation (one of the salient features of post/socialism) captured by the well-known Chinese proverb “groping for stones to cross the river.” This saying is an apt metaphor for the tentative searching by state, institution, and individual for a safe foothold in the post/socialist world.

Details

Post-Socialism is not Dead: (Re)Reading the Global in Comparative Education
Type: Book
ISBN: 978-0-85724-418-5

Keywords

Abstract

Details

Understanding Mattessich and Ijiri: A Study of Accounting Thought
Type: Book
ISBN: 978-1-78714-841-3

Article
Publication date: 26 April 2019

Colin Knox and Saltanat Janenova

The purpose of this paper is to investigate the emergence of e-government in post-Soviet countries using Kazakhstan as a case study. Extant research on e-government in developing…

Abstract

Purpose

The purpose of this paper is to investigate the emergence of e-government in post-Soviet countries using Kazakhstan as a case study. Extant research on e-government in developing countries highlights significant benefits including improved public services, reduced corruption, and more open and inclusive government. The paper asserts the presence of an e-government paradox which limits its potential to improve public services.

Design/methodology/approach

Primary data were collected from a number of sources: 6 focus groups with central government agencies, local authorities and civil society organisations; 25 structured and semi-structured interviews; and participant observation.

Findings

The research finds evidence of an e-government paradox in five forms: an emphasis on technological development; transactional services are faster but have displaced attention from core public services; petty corruption has been reduced but grand corruption remains; isomorphic mimicry; and greater participation by citizens has been limited.

Research limitations/implications

The focus of the research is Kazakhstan. Applying the lessons learned to other post-Soviet countries has limitations given their different stages of development since independence.

Practical implications

The key practical implication of this research is that countries can become absorbed by e-government technology without questioning the fundamental business model which underpins how public services are delivered. Ultimately, this impacts on the social value of e-government.

Originality/value

While existing research has examined how e-government has been implemented in developing countries, this paper focusses on Kazakhstan as an authoritarian state with wider implications for post-Soviet countries.

Details

International Journal of Public Sector Management, vol. 32 no. 6
Type: Research Article
ISSN: 0951-3558

Keywords

Article
Publication date: 26 January 2023

Rodrigo Pedral Sampaio, António Aguiar Costa and Inês Flores-Colen

This paper aims to contribute to the discussion of the following questions: How can the digital transition improve the management of the operation and maintenance of…

Abstract

Purpose

This paper aims to contribute to the discussion of the following questions: How can the digital transition improve the management of the operation and maintenance of infrastructure in health-care facilities? What is the legacy for facility management (FM) teams in this post-COVID-19 management of hospital buildings?

Design/methodology/approach

Based on a literature review, this paper analyses and categorises existing research on the digital challenges for FM from 2011 until 2021 by conducting a qualitative and quantitative method of bibliometric analysis and discussing the status of digital transition impact on FM of the hospital buildings.

Findings

The trends and challenges of building information modelling, artificial intelligence and the Internet of Things identified and discussed in this paper aim to be as comprehensive as possible to grasp the situation of digital transition in the FM industry in the hospital buildings context. Regarding digital maturity, the limited number of publications highlights that control and management systems cannot fully manage the entire operational phase of hospital buildings. Giving intelligence to buildings will undoubtedly be the future. So making buildings reactive, interactive and immersive is an inevitable transformation for intelligent hospital building systems. Thus, the added value of digitalisation will help facility managers to overcome the issues pointed out in this paper to deal with the growing health demands and enable them to mitigate the impacts of a new and future pandemic.

Originality/value

The novelty of this paper is classifying and unifying facility managers' tendencies regarding high-level information management issues, which are lacking in the literature, with a focus on the approaches with potential and higher impact on FM in the hospital building context and the related steps that should be considered regarding data collection and data structures. These tendencies provide a set of new intelligent approaches and tools, which will increase the efficiency of processes, significantly impacting the potential of optimisation. Also, these trends can improve planning and management of scope, costs, environment and safety in the value chain of projects and assets, thus creating a more resilient and sustainable industry for facility managers in this post-COVID-19 management for hospital buildings.

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