Search results
1 – 10 of over 101000Muhammad A. Ayub, Ruziyati Tajuddin and Michael R. Jackson
In the garment industry, web lace fabric material must be tensioned and placed at the right position and orientation prior to the cutting process. In order to avoid a bottleneck…
Abstract
Purpose
In the garment industry, web lace fabric material must be tensioned and placed at the right position and orientation prior to the cutting process. In order to avoid a bottleneck, the speed of material handling must be relatively fast compared to the laser cutting speed so that the use of a laser for rapid prototyping of two‐dimensional (2D) cutting shapes is feasible. The purpose of this paper is to describe the development of a novel gripping system for handling flexible web materials.
Design/methodology/approach
The manner in which this intelligent material handling system operates will be discussed in this paper. This includes its system configuration, errors that may occur during the web handling operation, and sequential operations of web distortion control. The material handling system uses a machine vision system coupled with a self‐tuning motion control strategy to assist the material handling system in controlling the web tension, adjusting the web deformation parameters and transporting the web materials.
Findings
The online image analysis and a novel mechanical design concept, coupled with the motion controller, are the key issues in the mechatronic integration of this intelligent web‐based material handling system.
Originality/value
The paper presents a novel approach to designing and realizing an intelligent gripping system, which has not previously been attempted.
Details
Keywords
A key task in the material handling system design process is the selection and configuration of equipment for material transport and storage in a facility. Material handling…
Abstract
A key task in the material handling system design process is the selection and configuration of equipment for material transport and storage in a facility. Material handling equipment selection is a complex, tedious task. However, there are few tools other than checklists to assist engineers in the selection of appropriate, cost‐effective material handling equipment. This paper describes the development of an intelligent material handling equipment selection system called MHESA (Material Handling Equipment Selection Advisor). The MHESA is composed of three modules: a database to store equipment types with their specifications; a knowledge‐based expert system for assisting material handling equipment selection; and an analytic hierarchy process (AHP) model to choose the most favorable equipment type. The concept proposed in this paper can automate the design of material handling equipment selection system, and provides artificial intelligence in the decision‐making process.
Details
Keywords
Antonio C. Caputo and Pacifico M. Pelagagge
This paper aims to discuss some relevant issues in the design and operation of material handling and storage systems (MH&SS) characterized by complex material flows and…
Abstract
Purpose
This paper aims to discuss some relevant issues in the design and operation of material handling and storage systems (MH&SS) characterized by complex material flows and high‐traffic intensity. The paper seeks to provide solution examples and an analysis methodology to face large increases of materials flows through a redesign of the material handling and storage system.
Design/methodology/approach
At first, possible strategies to improve system performances when facing strong increments of material flows are presented and discussed. A significant case study is then analyzed in order to present a practical application of the proposed methodology. Resorting to discrete‐events simulation, the alternatives are verified, correct design choices are identified, and the resources are properly sized to develop a streamlined layout.
Findings
The paper recognises that design and upgrade of intensive material handling systems is a complex task asking for a careful study of alternatives and detailed system analysis, otherwise capacity problems and bottleneck phenomena may not be effectively solved.
Research limitations/implications
This work focuses on a specific case study. The paper, therefore, will be of interest mainly to managers and designers of similar plants and large – intensive material handling systems.
Practical implications
The paper shows how the correct planning and analysis of design alternatives integrated with a detailed system simulation enable a drastic reduction of bottleneck phenomena, thus meeting the required capacity improvement goals when upgrading and redesigning complex and high‐volume material handling systems.
Originality/value
The paper, while providing insights to practitioners engaged in design and management of complex MH&SS, outlines a methodological approach which can be useful when facing major capacity improvement projects.
Details
Keywords
IN a departure from usual practice this issue concentrates to a large extent upon a single subject — Mechanical Handling. It coincides with that industry's exhibition at Earls…
Abstract
IN a departure from usual practice this issue concentrates to a large extent upon a single subject — Mechanical Handling. It coincides with that industry's exhibition at Earls Court from the 9th to 19th of this month, to be opened by the Rt. Hon. Christopher Chataway, M.P., Minister for Industrial Development. In consequence it was necessary to defer some regular features for a time, for which we apologise.
Tom Cerni, Guy J. Curtis and Susan H. Colmar
The purpose of this paper is to examine how the rational and experiential systems according to the cognitive‐experiential self theory (CEST) are related to conflict‐handling…
Abstract
Purpose
The purpose of this paper is to examine how the rational and experiential systems according to the cognitive‐experiential self theory (CEST) are related to conflict‐handling styles.
Design/methodology/approach
Using a correlational design, data were collected using an on‐line survey system examining CEST information‐processing systems and five conflict‐handling styles. A total of 426 undergraduate students, with paid jobs, complete the on‐line survey.
Findings
Results showed that the rational system, experiential system and constructive thinking had significant positive relationships with both the integrating and compromising conflict‐handling styles. Additionally, the rational system had a positive relationship with the dominating conflict‐handling style and the experiential system and constructive thinking had a positive relationship with the obliging conflict‐handling style. The rational system and constructive thinking had a negative relationship with the avoiding conflict‐handling style.
Research limitations/implications
The study established a positive connection between CEST information‐processing systems and conflict‐handling styles among undergraduate students, however the results of the study may not be as directly comparable with real and established leaders.
Originality/value
Being the first study to examine the connection between the CEST information‐processing systems and the five conflict‐handling styles, the paper offers interesting insights about how the choice of information‐processing systems can influence the choice of conflict‐handling styles across a wide range of situations.
Details
Keywords
John Gattorna, Abby Day and John Hargreaves
Key components of the logistics mix are described in an effort tocreate an understanding of the total logistics concept. Chapters includean introduction to logistics; the…
Abstract
Key components of the logistics mix are described in an effort to create an understanding of the total logistics concept. Chapters include an introduction to logistics; the strategic role of logistics, customer service levels, channel relationships, facilities location, transport, inventory management, materials handling, interface with production, purchasing and materials management, estimating demand, order processing, systems performance, leadership and team building, business resource management.
Details
Keywords
THIS country is suffering from a serious shortage of skilled workers. This fact was brought into sharp focus when John Brown, the famous shipbuilders, announced two weeks ago that…
Abstract
THIS country is suffering from a serious shortage of skilled workers. This fact was brought into sharp focus when John Brown, the famous shipbuilders, announced two weeks ago that it had been necessary for them to decline a £5 million order because of a lack of labour in the steel and allied trades. The firm and the size of the potential order ensured national attention, but it cannot be accepted as an isolated instance. When the Ministry of Labour tells us that although 3,124 mostly skilled men entered shipbuilding and marine engineering during the last five weeks for which figures are available, but that there remained 2,860 unfilled jobs, or that 3,264 taken into metal manufacturing left 4,637 vacancies, there is need for concern and investigation.
Louwrens J. Butler and Glen Bright
This paper aims to examine the structure of the control strategy that is being deployed on the control of the mobile materials handling platform, from the higher level onboard…
Abstract
Purpose
This paper aims to examine the structure of the control strategy that is being deployed on the control of the mobile materials handling platform, from the higher level onboard interface software to the low‐level control system that is tasked with the dynamic stability of the platform.
Design/methodology/approach
The application of the principle of the inverted pendulum in mobile robotics has only recently been made possible by advances in the technology of electronics. A mobile materials handling platform has been designed and built for use in manufacturing systems of the future. The principle of the inverted pendulum has been incorporated into the design. This means that the platform is able to maintain dynamic stability during specific periods of operation. The mechatronic engineering approach was adopted in the design of the platform, which produced an integrated embedded system.
Findings
Open source software being implemented onboard the platform for interfacing between the platform and remote client computers is found to be easily customisable according to the requirements of one's application. A solution to the problem of nonholonomic motion constraints that concern any differential drive mobile robot was found in a nonlinear state transformation algorithm. The algorithm was implemented on an intermediate level between the interface software and the low‐level control system. The low‐level feedback control system was designed using a linear quadratic regulator design method. Simulations of this control system showed that it was robust enough to reject predetermined disturbances in system characteristics.
Originality/value
The application of a mobile platform specifically designed for materials handling based on the principle of the inverted pendulum has not been attempted to date.
Details
Keywords
The purpose of this paper is to propose a “Reconfiguration Methodology” in manufacturing systems that they can become more economically sustainable and can operate efficiency and…
Abstract
Purpose
The purpose of this paper is to propose a “Reconfiguration Methodology” in manufacturing systems that they can become more economically sustainable and can operate efficiency and effectively. This methodology will allow customized flexibility and capacity not only in producing a variety of products (parts) and with changing market demands, but also in changing and reengineering the system itself.
Design/methodology/approach
Reconfigurable manufacturing system (RMS) is a philosophy or strategy which was introduced during the last decade to achieve agility in manufacturing systems. Until now, the RMS philosophy was based changing activities such routing, planning, programming of machines, controlling, scheduling, and physical layout or materials handling system. But the RMS concept can be based on the needed reconfiguration level (NRL), operational status of production systems, and new circumstances (NC). The NRL measure is based on the agility level of the manufacturing systems which is based on technology, people, management, and manufacturing strategies. The components of the manufacturing system design (MSD) consist of production system design, plant layout system, and material handling system. Operational status of production systems includes machine capability (flexibility) and capacity (reliability), production volume or demand, and material handling equipment in addition to the plant layout. The NC are also consisting of new product, developing the existing ones, and changing in demand.
Findings
Reconfiguration manufacturing systems from one period to another period is highly desired and is considered as a novel manufacturing philosophy and/or strategy toward creating new sustainable manufacturing systems. A new reconfiguration methodology for the manufacturing systems will be analyzed and proposed. Two Case studies will be introduced.
Originality/value
The suggestion of a new methodology of reconfiguration including the NRL (configurability index) and the operational status of manufacturing systems with respect to any circumstance is highly considered. The reconfiguration methodology also provides a framework for sustainability in the manufacturing area which mainly focussed on manufacturing systems design.
Details
Keywords
Santhanam Harit, G. Don Taylor and C. Ray Asfahl
Describes a user‐friendly decision support tool to select near optimal containers for specific manufacturing scenarios relative to all the constraints associated with the use of…
Abstract
Describes a user‐friendly decision support tool to select near optimal containers for specific manufacturing scenarios relative to all the constraints associated with the use of the container. Guides the user through a dialogue to input constraints and scenario‐specific information. Shows how the decision support tool iterates between an expert system and a simulation model, to produce a near optimal container with respect to internal and external dimensional requirements. Explains the methods by which the system is tested and validated in a realistic environment. Discusses future research directions.
Details