Showing items 1 - 3 of 3

Your selections:

Cyclic production for robotic cells served by multi-function robots with resumable processing regime

- Foumani, Mehdi, Ibrahim, Yousef, Gunawan, Indra

  • Authors: Foumani, Mehdi , Ibrahim, Yousef , Gunawan, Indra
  • Date: 2013
  • Type: Text , Conference paper
  • Relation: 2013 IEEE International Conference on Industrial Engineering and Engineering Management, Bangkok, (10 - 13 December 2013) p. 551-555
  • Full Text: false
  • Reviewed:
  • Description: This paper addresses the problem of finding the optimal robot move cycle to minimise the cycle time of two-machine cells. The earlier robot's function was mainly moving parts between machines in a manufacturing process. We lift this assumption on robot tasks and assumed a special robot, namely multi-function, which performs a unique operation in transit. This robot starts performing this operation after unloading a part from input buffer and finishes it before loading the part to the output buffer. The processing mode on robot is “stop resume”. Thus, regardless of the gap interrupts during the operation, the robot continues processing on part when it is reloaded to the robot without any loss in time. The focus of this study is on one-unit cycles since they are very popular in industry. The cycle time of two possible one-unit cycles is obtained, and the optimality condition of them is determined.

On reliability evaluation of multistate weighted k -out-of- n system using present value

- Khorshidi, Hadi, Gunawan, Indra, Ibrahim, Yousef

  • Authors: Khorshidi, Hadi , Gunawan, Indra , Ibrahim, Yousef
  • Date: 2015
  • Type: Text , Journal article
  • Relation: Engineering Economist Vol. 60, no. 1 (2015), p. 22-39
  • Full Text: false
  • Reviewed:
  • Description: A new reliability evaluation methodology for multistate weighted k-out-of-n systems is presented in this article. The present value of the cash flow generated by the system components is used as a reliability value. We take a financial view of reliability and consider functioning periods and the time value of money in system reliability analysis. Two approaches, the universal generating function (UGF) and recursive algorithm, are applied to evaluate the reliability of the multistate weighted k-out-of-n system. An illustrative example is calculated based on the proposed system reliability evaluation methodology. It is shown that this evaluation method can also be used to find the value of the maintenance policy. Finally, the UGF and recursive algorithm approaches are compared with each other for large system reliability assessment. [ABSTRACT FROM AUTHOR] Copyright of Engineering Economist is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Quantifying the impact of using multi-function robots on productivity of rotationally arranged robotic cells

- Foumani, Mehdi, Ibrahim, Yousef, Gunawan, Indra

  • Authors: Foumani, Mehdi , Ibrahim, Yousef , Gunawan, Indra
  • Date: 2015
  • Type: Text , Conference paper
  • Relation: 2013 IEEE International Conference on Industrial Engineering and Engineering Management , Bangkok, 2013 p. 1194-1198
  • Full Text: false
  • Reviewed:
  • Description: This paper investigates the scheduling of a rotationally arranged robotic cell with the Multi-Function Robot (MFR). The earlier known robotic study in this area assumed that the robot only moves the part between machines. We lift this assumption on robot tasks and assumed a special class of robots which is also able to perform a special operation in transit. The aim is to find a minimum cycle time for identical part production. Considering additive and constant travel-time, the distance between any two machines is varying or constant based on the robot acceleration/deceleration for incompact and compact cells. The lower bound of the cycle time is deduced to evaluate the optimality of two practical permutations namely uphill and downhill. It also identifies the regions where using a Multi-Function Robotic Cell (MFRC) is more economical than a Single-Function Robotic Cell (SFRC).
  • 1