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Article
Publication date: 31 May 2022

Junlin Cheng, Peiyu Ma, Qiang Ruan, Yezhuo Li and Qianqian Zhang

The purpose of this paper is to propose an overall deformation rolling mechanism based on double four-link mechanism. The double quadrilateral mobile mechanism (DQMM) has…

Abstract

Purpose

The purpose of this paper is to propose an overall deformation rolling mechanism based on double four-link mechanism. The double quadrilateral mobile mechanism (DQMM) has two switchable working modes which can be used to traverse different terrains or climb over obstacles.

Design/methodology/approach

The main body of the DQMM is composed of a double four-link mechanism which sharing a public link and two symmetrical steering platforms which placed at both ends of the four-link mechanism. The steering platforms give the DQMM not only steering ability but also reconnaissance ability which can be achieved by carrying sensors such as cameras on steering platforms. By controlling the deformation of the DQMM, it can switch between two working modes (tracked rolling mode and obstacle-climbing mode) to achieve the functions of rolling and obstacle-climbing. Dynamic simulation model was established to verify the feasibility.

Findings

Based on the kinematics analysis and simulation results of the DQMM, its moving function is realized by the tracked rolling mode, and the obstacle-climbing mode is used to climb over obstacles in structured terrains such as continuous stairs. The feasibility of the two working modes is verified on a physical prototype.

Originality/value

The work of this paper is a new exploration of applying “overall closed moving linkages mechanism” to the area of small mobile mechanisms. The adaptability of different terrains and the ability of obstacle-climbing are improved by the combination of multi-modes.

Details

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

Keywords

Article
Publication date: 23 May 2022

Xuemei Xie, Huimiao Zhang and Cristina Blanco

Family businesses often lack sufficient knowledge about digital business model innovation digital business model innovation (BMI). This study's purpose was to analyze how…

Abstract

Purpose

Family businesses often lack sufficient knowledge about digital business model innovation digital business model innovation (BMI). This study's purpose was to analyze how and when organizational readiness for digital innovation exerts a positive impact on family businesses' digital BMI. To do so, the authors examined the mediating effect of the familiness learning mechanism and the moderating effect of family involvement on this relationship.

Design/methodology/approach

A quantitative survey method was used to collect the data for this study. Using a sample of 282 family businesses involved in manufacturing in China, the authors conducted hierarchical regression analyses to evaluate the authors' theoretical model.

Findings

The results of this work demonstrate a positive relationship between organizational readiness for digital innovation and family businesses' digital BMI, and the find that the familiness learning mechanism mediates this relationship. The findings also show that second-generation family involvement in management moderates the direct effect of organizational readiness for digital innovation on the familiness learning mechanism, as well as the indirect effect of organizational readiness for digital innovation on digital BMI via the familiness learning mechanism. Moreover, the results establish that family involvement in ownership moderates the direct effect of the familiness learning mechanism on digital BMI, as well as the indirect effect of organizational readiness for digital innovation on digital BMI via the familiness learning mechanism.

Practical implications

This study provides practical contributions to the literature on family businesses and to public policy, providing concrete suggestions for fostering digital innovation in family enterprises. This study also enriches our understanding of the unique conditions by which family businesses can successfully implement digital BMI.

Originality/value

This research confirms that organizational readiness for digital innovation is an antecedent of digital BMI. This finding offers a new perspective that helps explain what might lead family businesses to engage in digital BMI. This study also places the familiness learning mechanism into a theoretical framework, which expands the current understanding of how organizational readiness for digital innovation facilitates digital BMI. Moreover, this work provides new insights into the boundary conditions by which organizational readiness for digital innovation affects the digital BMI of family businesses in terms of second-generation family involvement in management and family involvement in ownership.

Details

International Journal of Entrepreneurial Behavior & Research, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1355-2554

Keywords

Article
Publication date: 14 June 2022

Jamal El Baz, Pietro Evangelista, Sadia Iddik, Fedwa Jebli, Ridha Derrouiche and Temidayo Akenroye

There have been several reviews of green, ecological and sustainable innovations, but a thorough assessment of green innovation (GI)'s mechanisms in a supply chain setting…

Abstract

Purpose

There have been several reviews of green, ecological and sustainable innovations, but a thorough assessment of green innovation (GI)'s mechanisms in a supply chain setting has not been attempted yet. The purpose of this paper is to review how GI was investigated in supply chains through the lens of a multilevel framework of innovation mechanisms.

Design/methodology/approach

The authors provide a comprehensive assessment of prior studies using a systematic literature review approach and content analysis of 136 papers identified from the Web of Science Core Collection database.

Findings

Current literature on green innovation supply chains (GISC) has been categorized according to three main causal mechanisms: situational, action-formation and transformational mechanisms. Three different levels of analysis were considered for the three mechanisms: macro, meso and micro. In addition, the authors have also assessed the value creation and appropriation outcomes of GI. The authors identified relevant research gaps in the extant literature and a set of propositions that may guide future research in this area.

Research limitations/implications

This review provides a novel perspective on GISC based on a multilevel theoretical framework of mechanisms.

Practical implications

The causal mechanisms assessment of GISC can be adopted by organizations to convince their SC partners to engage in collaborative and more ambitious initiatives in the field.

Social implications

The findings of this review could serve as an argument for more encompassing and ambitious GISC initiatives which can be of benefit to society.

Originality/value

A thorough assessment of the interacting mechanisms in GISC has not been attempted before. The authors identify gaps in current literature and provide several propositions for further research avenues based on causal mechanisms framework.

Details

The International Journal of Logistics Management, vol. 33 no. 3
Type: Research Article
ISSN: 0957-4093

Keywords

Article
Publication date: 19 January 2015

Masashi Konno, Yutaka Mizota and Taro Nakamura

This paper aims to develop a wave-transmitting mechanism for a travelling-wave-type omnidirectional mobile robot. Existing omnidirectional mechanisms are prone to movement…

Abstract

Purpose

This paper aims to develop a wave-transmitting mechanism for a travelling-wave-type omnidirectional mobile robot. Existing omnidirectional mechanisms are prone to movement instability because they establish a small contact area with the ground. The authors have developed a novel omnidirectional mobile robot that achieves stable movement by a large ground-contact area. The proposed robot moves by a wave-transmitting mechanism designed for this purpose.

Design/methodology/approach

To achieve stable movement, a spiral-type travelling-wave-propagation mechanism that mimics the locomotion mechanism of a snail was developed. The mechanism was applied to an omnidirectional mobile robot.

Findings

The practicality of magnetic attraction was verified in experiments of the wave-transmitting mechanism. Moreover, omnidirectional movement was confirmed in a robot prototype adopting this mechanism.

Research limitations/implications

The proposed robot will eventually be deployed in human spaces such as factories and hospitals. A mechanically improved version of the robot will be evaluated in load-driving experiments and equipped with control systems.

Originality/value

This paper proposes an omnidirectional mobile robot with a large ground contact area that moves by continuous travelling waves. The practicability of this mechanism was experimentally confirmed, and a prototype robot achieved omnidirectional movement.

Details

Industrial Robot: An International Journal, vol. 42 no. 1
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 12 October 2012

Zhang Han‐jiang and Luo Duan‐hong

The purpose of this paper is to describe how the performance of a system is determined.

1788

Abstract

Purpose

The purpose of this paper is to describe how the performance of a system is determined.

Design/methodology/approach

Systems with the same structure or function often have different performances. What makes the difference? Within a system, the various actors make their decisions by their own and their actions depend on the mechanism of the system. The actors' strategy selection under different mechanisms and the mechanism design are precisely in the range of Game Theory. This paper compares two different pricing mechanisms, the Stackelberg Game and Cournot Game, in a linear supply chain. And the obtained result of the different behavior (Pm*, Pr*) and different performance (Um*, Ur*) of the supply chain obviously approves our proposition that the operational mechanism is of great importance to the performance of the system, the same as structure.

Findings

It is the structure of the system and operational mechanism which determines the performance of the system.

Research limitations/implications

The paper's limitations lie in the fact that it is not yet based on experimental evidence from real‐world systems.

Practical implications

Game Theory is one of the most effective methods to study the systematic mechanism, especially the mechanism designs, because it reveals the inherent nature of the systematic mechanism.

Originality/value

This paper points out that the mechanism which restricts each behavioral subject determines the performance of these systems. It puts forward a new region for the research of general system theory.

Details

Kybernetes, vol. 41 no. 9
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 4 October 2011

Yonghua Chen and Chen Zhezheng

The main purpose of this study is to develop a systematic method that can minimize joint clearance for non‐assembly mechanism fabrication using a layer‐based fabrication…

1590

Abstract

Purpose

The main purpose of this study is to develop a systematic method that can minimize joint clearance for non‐assembly mechanism fabrication using a layer‐based fabrication technology.

Design/methodology/approach

Joint clearance is one of the key factors affecting a mechanism's performance. Hertz theory is adopted to analyze the joint clearance‐penetration displacement relationship and the impact force‐displacement relationship. This analysis has indicated the importance of reducing joint clearance. To reduce joint clearance in layer‐based fabrication, a drum‐shaped roller is proposed for pin joint design in non‐assembly mechanism fabrication. Compared to cylindrical pin joint design, a drum‐shaped roller joint results in less impact force in mechanism operation. Furthermore, the joint clearance can also be drastically reduced.

Findings

Large joint clearance could introduce instability into the dynamic behaviour of a mechanism. By applying a drum‐shaped roller, the instability could apparently be alleviated. This has been demonstrated by both simulation and fabrication of a number of mechanisms with and without drum‐shaped pin joints.

Practical implications

Since the proposed joint design can reduce the joint clearance in rapid fabrication of non‐assembly mechanisms, it is possible to expand layer‐based rapid fabrication techniques for more mechanism design applications.

Originality/value

Layer‐based fabrication technologies have two distinct advantages: building parts without geometry restriction; and building sub‐systems (static or mobile) without the need for assembly. Only very few previous studies have investigated the applications that can benefit from the second advantage due to the limited accuracy of layer‐based technologies in making joints of a mechanism. Through the proposed drum‐shaped roller pin joint design together with the proposed joint design guidelines, joint clearance can be reduced significantly. Thus, sub‐systems or mechanisms built using layer‐based technologies could have accuracy close to the design specification. This will expand the application of layer‐based technologies to more mechanism or mobile mechanical system studies.

Details

Rapid Prototyping Journal, vol. 17 no. 6
Type: Research Article
ISSN: 1355-2546

Keywords

Article
Publication date: 27 April 2012

Chu Xiaobing, Gao Feng and Ge Hao

The purpose of this paper is to present the direct kinematic analysis of a heavy‐payload forging manipulator. In the grasping stage, the manipulator is equivalent to a…

Abstract

Purpose

The purpose of this paper is to present the direct kinematic analysis of a heavy‐payload forging manipulator. In the grasping stage, the manipulator is equivalent to a 3‐DOF under‐actuated mechanism. In order to deal with the direct position kinematics of the under‐actuated mechanism, the analysis is performed in two steps.

Design/methodology/approach

The paper analyzes the direct position kinematics of the 3‐DOF under‐actuated mechanism as follows: first, the authors add a virtual constraint on the mechanism, convert it to a 2‐DOF fully actuated mechanism and calculate the direct kinematics of the constrained mechanism. Then, the constraint is applied to many different positions and the corresponding direct kinematics of the constrained mechanism are calculated, respectively. Finally, the mechanism with lower gravitational potential energy than any other constrained mechanism is chosen, and its direct position is what is needed for the 3‐DOF underactuated mechanism.

Findings

The paper provides a solution for the direct kinematic analysis of a heavy‐payload forging manipulator in the grasping stage. Furthermore, the simulation and experiment results confirm the effectiveness of the solution.

Originality/value

The paper proposes a methodology to deal with the direct position kinematics of the 3‐DOF under‐actuated mechanism in two steps.

Details

Industrial Robot: An International Journal, vol. 39 no. 3
Type: Research Article
ISSN: 0143-991X

Keywords

Abstract

Details

Organisational Roadmap Towards Teal Organisations
Type: Book
ISBN: 978-1-78756-311-7

Book part
Publication date: 27 June 2015

Michael W. Stebbins and Judy L. Valenzuela

This chapter describes two change efforts involving participatory action research within the pharmacy operations division of Kaiser Permanente. Focus is on a parallel…

Abstract

This chapter describes two change efforts involving participatory action research within the pharmacy operations division of Kaiser Permanente. Focus is on a parallel learning mechanism that has been used to support communications and change during two large-scale information technology interventions. It begins with basic background information on participatory action research in organizations. Since the case setting is Kaiser Permanente, the chapter provides some information on the U.S. healthcare industry context and then shifts to Kaiser’s communication forum, a learning mechanism that has been in place for 35 years. Cognitive, structural, and procedural aspects of the learning mechanism are explored, and the chapter features interviews with some of the key forum players. Both in the forum’s infancy and in its current more institutionalized state, the pharmacy organization has been in crisis. Implications for the use of parallel learning structures on a long-term basis to support long-term participatory action research are explored along with contributions to theory on insider/outsider action research.

Book part
Publication date: 4 August 2015

Byungchae Jin and David A. Kirsch

Why do some ventures grow to become dominant market players while most new ventures that do not fail limp along more modest trajectories? In comparison with our knowledge…

Abstract

Why do some ventures grow to become dominant market players while most new ventures that do not fail limp along more modest trajectories? In comparison with our knowledge regarding determinants of venture creation or survival, the phenomenon of venture growth has been relatively neglected, both theoretically and empirically. Venture growth is a multi-level phenomenon co-occurring at different analytical and temporal levels. In this chapter we develop a theoretical model that accounts for venture growth as a process, drawing upon the mechanism-based theorizing approach. We offer nine social mechanisms that lead to venture growth, providing a foundation for empirical exploration and further theory building.

Details

Entrepreneurial Growth: Individual, Firm, and Region
Type: Book
ISBN: 978-1-78560-047-0

Keywords

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