Experience of the Application of Intelligent Control Paradigms to Real Manufacturing Processes

1995 ◽  
Vol 209 (4) ◽  
pp. 293-308 ◽  
Author(s):  
A A West ◽  
D J Williams ◽  
C J Hinde
Keyword(s):  
Intelligent Control ◽  
Printed Circuit Boards ◽  
Time Constraints ◽  
Manufacturing Processes ◽  
Circuit Boards ◽  
Proportional Control ◽  
Printed Circuit ◽  
Knowledge Based ◽  
Real Process ◽  
Neural Network Controllers

The application of conventional and intelligent control paradigms to the dispensing of adhesive in the manufacture of mixed technology printed circuit boards, a real process with real time constraints and error conditions, is outlined in this paper. A description of the process and its various operation and error states is followed by a brief discussion of the application of conventional (system identification and incremental proportional control) and intelligent (knowledge-based, fuzzy logic and neural network) controllers to the system. Comments on the control and timing performance of each paradigm are given.

A Solution Methodology for the Multiple Batch Surface Mount PCB Placement Sequence Problem

1994 ◽  
Vol 116 (4) ◽  
pp. 282-289 ◽  
Author(s):  
Yu-Wen Huang ◽  
K. Srihari ◽  
Jim Adriance ◽  
George Westby
Keyword(s):  
Printed Circuit Boards ◽  
Solution Method ◽  
Identification Problem ◽  
Circuit Boards ◽  
Surface Mount ◽  
Printed Circuit ◽  
Knowledge Based ◽  
Sequence Identification ◽  
Placement Machine ◽  
Solution Methodology

The placement of surface mount components is a time consuming and critical task in the assembly of surface mount Printed Circuit Boards (PCBs). The focus of this research was the identification of “near optimal” solutions for the placement sequence identification problem. The factors considered include the placement machine and the specific PCB, the feeder space available, the need for tooling and nozzle changes, and the actual traveling path of the placement head. Expert (or knowledge based) systems were used as the solution method for this problem. The system developed can cope with single PCBs, panels, 180 deg offset boards (panels), and multiple PCB batches. The prototype knowledge based system developed in this research identifies solutions in (almost) realtime.

An Object-Oriented Knowledge-Based System for Assembly of Printed Circuit Boards

1991 ◽  
Author(s):  
Sisir K. Padhy ◽  
S. N. Dwivedi
Keyword(s):  
Knowledge Base ◽  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Object Oriented ◽  
Circuit Board ◽  
Design Stage ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Knowledge Based System ◽  
Knowledge Based

Abstract In this paper, Printed Circuit Board Assembly Advisor (PCAAD), an object-oriented knowledge-based system is described. The system aims to aid the designer by suggesting design modifications that will lead to a better design for assembly of the Printed Circuit Boards. To account for the new trends in the printed circuit board production, hybrid technology, i.e. combination of both the through-hole mounted technology and surface mounted technology, is taken into consideration in developing the knowledge base. The assembly constraints as well as various limitations of different techniques and processes are considered to formulate the rules and guidelines. Moreover, a hierarchical rule structure has been employed in creating the knowledge base. Smalltalk-80, the object-oriented language and Surface Percept Description Language (SPDL) are used for the creation of knowledge base. The system provides a high-level user interface and reasoning capability to solve complex problems. It is capable of ranking different designs and suggesting design modifications to the designer during the design stage to eliminate assembly problems in the latter phase of board production.

Slit Effect of Common Ground Patterns in Affecting Cross-Talk Noise between Two Parallel Signal Traces on Printed Circuit Boards

2008 ◽  
Vol 128 (11) ◽  
pp. 657-662 ◽  
Author(s):  
Tsuyoshi Maeno ◽  
Yukihiko Sakurai ◽  
Takanori Unou ◽  
Kouji Ichikawa ◽  
Osamu Fujiwara
Keyword(s):  
Cross Talk ◽  
Printed Circuit Boards ◽  
Common Ground ◽  
Circuit Boards ◽  
Printed Circuit
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