A Fiber-Optic-Based Protocol for Manufacturing System Networks: Part I—Conceptual Development and Architecture

1992 ◽  
Vol 114 (1) ◽  
pp. 113-120 ◽  
Author(s):  
A. Ayyagari ◽  
A. Ray
Keyword(s):  
Real Time ◽  
Computer Aided Design ◽  
Conceptual Development ◽  
Manufacturing System ◽  
Fiber Optic ◽  
Mac Protocol ◽  
Computer Integrated Manufacturing ◽  
Plant Management ◽  
Machine Model ◽  
Loop Control

The goal of Computer Integrated Manufacturing (CIM) is to put together the diverse areas of engineering, design and production processes, material inventory, sales and purchasing, and accounting and administration into a single interactive closed loop control system [1]. Essential to this distributed total manufacturing system is the integrated communications network over which the information leading to process interactions, and plant management and control will flow. Such a network must be capable of handling heterogeneous real-time (e.g., data packets for inter-machine communications at the factory floor) and non-real-time (e.g., Computer Aided Design (CAD) drawings, design specifications, and administrative information) traffic. This sequence of papers in two parts presents the development and analysis of a novel fiber-optic-based medium access control (MAC) protocol for integrated factory and office communications. Its adaptation as the common MAC layer protocol in the fiber-optic-based version of Manufacturing Automation Protocol (MAP) [2] and Technical and Office Protocols (TOP) [3], will make their specifications identical up to the presentation layer; only the application layer which is user-specific could be different. This first part provides the necessary background for the reported work and details of the protocol which is represented by a finite-state-machine model. Part II [4] presents the performance analysis of the protocol using a statistical model, and a comparison of the simulation and analytical results.

A Fiber-Optic-Based Protocol for Manufacturing System Networks: Part II—Statistical Analysis

1992 ◽  
Vol 114 (1) ◽  
pp. 121-131 ◽  
Author(s):  
A. Ayyagari ◽  
A. Ray
Keyword(s):  
Statistical Model ◽  
Real Time ◽  
Conceptual Development ◽  
Fiber Optic ◽  
Discrete Event ◽  
Simulation Models ◽  
Distribution Functions ◽  
Computer Integrated Manufacturing ◽  
Event Simulation ◽  
Arrival Processes

Conceptual development, architecture, statistical and simulation models, and the results of test and verification of a fiber-optic-based protocol have been reported in a sequence of two papers. The protocol uses the unidirectional bus topology and is specifically designed for computer integrated manufacturing (CIM) networks. The architecture of the protocol is formulated in Part I [1]. In this second part, a statistical model of the proposed protocol is formulated for analyzing the network-induced delays and pertinent results of analysis and simulation are presented for different scenarios of network traffic. The major assumptions in formulating the statistical model are: (1) message arrival processes for real-time (RT) and non-real-time (NRT) modes are independent and Markov; and (2) message lengths follow independent general distributions with known statistical properties. The Laplace-Stieltjes transforms of probability distribution functions of queueing delays for RT and NRT messages have been derived. The analytical results for the first two moments of both RT and NRT queueing delays have been compared with those obtained from discrete event simulation.

Research on Machinery Manufacturing Industry's Future Development Strategy Based on CIMS

2013 ◽  
Vol 411-414 ◽  
pp. 1801-1804
Author(s):  
Yong Liu ◽  
Da Zheng Wang ◽  
Xue Shuang Len
Keyword(s):  
Development Strategy ◽  
Future Development ◽  
Computer Aided Design ◽  
Manufacturing Industry ◽  
Manufacturing System ◽  
Computer Integrated Manufacturing ◽  
Computer Aided ◽  
Micro Level ◽  
Machinery Manufacturing ◽  
Aided Design

This paper describes a strategy to fulfill the needs of the 21st century machinery manufacturing industry, especially for the industry that produces the low repetitive and high productmix components using machining centres. The approach of development strategy is emphasized in developing of computer integrated manufacturing system (CIMS). The system comprises of computer aided design (CAD) and computer aided manufacturing (CAM) modules, which is supported by common and working databases. Focuses on computer-integrated manufacturing's macro aspects and its future development strategy implications. Defines CIMS at the macro and micro level and the various factors that strongly call for the implementation of CIMS. After going into the advantages, concludes with development strategy implications for the future.

The System Software for Automatic Jam Detection and Recovery on Manufacturing System

2012 ◽  
Vol 271-272 ◽  
pp. 575-579
Author(s):  
Hwa Young Jeong ◽  
Bong Hwa Hong
Keyword(s):  
Computer Aided Design ◽  
High Performance ◽  
Manufacturing System ◽  
Recovery Process ◽  
Numerical Control ◽  
Computer Integrated Manufacturing ◽  
Integrated Manufacturing ◽  
System Engineer ◽  
Aided Design ◽  
Factory Operation

In manufacturing system, around the year 1950’s, computer aided design (CAD) and developments of NC resulted which led to the evolution of systems like computer numerical control (CNC) and direct numerical control (DNC). Today, computer integrated manufacturing is a reality. The advent of computer integrated manufacturing system has got an efficiency and high performance for production. And manufacturing system operating ratio was related by cost-efficiency of the factory operation and increasing good production. However it has still problem that the system engineer who is in the factory hard to keep watching the manufacturing system always in order to recover the manufacturing system when it has system error. In this paper, we propose system jam detection and recovery process for manufacturing system. For this process, we make and use system Jam Database and Jam Recovery Process Sequence.

A Playbook(trademark) for Real-Time, Closed-Loop Control

2005 ◽  
Author(s):  
Harry Funk ◽  
Robert Goldman ◽  
Christopher Miller ◽  
John Meisner ◽  
Peggy Wu
Keyword(s):  
Real Time ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Loop Control

scholarly journals Real-Time Energy Management of Parallel Hybrid Electric Vehicles Using Linear Quadratic Regulation

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5538
Author(s):  
Bảo-Huy Nguyễn ◽  
João Pedro F. Trovão ◽  
Ronan German ◽  
Alain Bouscayrol
Keyword(s):  
Real Time ◽  
Energy Management ◽  
Electric Vehicles ◽  
Hybrid Electric Vehicles ◽  
Engine Fuel ◽  
Linear Quadratic ◽  
Loop Control ◽  
Parallel Hybrid ◽  
Linear Quadratic Regulation ◽  
Hybrid Electric

Optimization-based methods are of interest for developing energy management strategies due to their high performance for hybrid electric vehicles. However, these methods are often complicated and may require strong computational efforts, which can prevent them from real-world applications. This paper proposes a novel real-time optimization-based torque distribution strategy for a parallel hybrid truck. The strategy aims to minimize the engine fuel consumption while ensuring battery charge-sustaining by using linear quadratic regulation in a closed-loop control scheme. Furthermore, by reformulating the problem, the obtained strategy does not require the information of the engine efficiency map like the previous works in literature. The obtained strategy is simple, straightforward, and therefore easy to be implemented in real-time platforms. The proposed method is evaluated via simulation by comparison to dynamic programming as a benchmark. Furthermore, the real-time ability of the proposed strategy is experimentally validated by using power hardware-in-the-loop simulation.

scholarly journals Evaluation of Optimal Vibrotactile Feedback for Force-Controlled Upper Limb Myoelectric Prostheses

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5209 ◽  
Author(s):  
Andrea Gonzalez-Rodriguez ◽  
Jose L. Ramon ◽  
Vicente Morell ◽  
Gabriel J. Garcia ◽  
Jorge Pomares ◽  
...  
Keyword(s):  
Real Time ◽  
Upper Limb ◽  
Closed Loop ◽  
Fine Tuning ◽  
Vibrotactile Feedback ◽  
Loop Control ◽  
Myoelectric Prostheses ◽  
Amplitude Level ◽  
Real Time Application ◽  
Selection Of

The main goal of this study is to evaluate how to optimally select the best vibrotactile pattern to be used in a closed loop control of upper limb myoelectric prostheses as a feedback of the exerted force. To that end, we assessed both the selection of actuation patterns and the effects of the selection of frequency and amplitude parameters to discriminate between different feedback levels. A single vibrotactile actuator has been used to deliver the vibrations to subjects participating in the experiments. The results show no difference between pattern shapes in terms of feedback perception. Similarly, changes in amplitude level do not reflect significant improvement compared to changes in frequency. However, decreasing the number of feedback levels increases the accuracy of feedback perception and subject-specific variations are high for particular participants, showing that a fine-tuning of the parameters is necessary in a real-time application to upper limb prosthetics. In future works, the effects of training, location, and number of actuators will be assessed. This optimized selection will be tested in a real-time proportional myocontrol of a prosthetic hand.

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