Automated Synthesis of MEMS Fabrication Sequences Using Graph Grammars

2007 ◽  
Author(s):  
Saneet A. Jawalkar ◽  
Matthew I. Campbell
Keyword(s):  
Expert System ◽  
Machine Tool ◽  
Mechanical Systems ◽  
Automated Synthesis ◽  
Manufacturing Constraints ◽  
Graph Grammars ◽  
Mems Fabrication ◽  
Grammar Rules ◽  
Design Software ◽  
Automated Process

The design of any MEMS component is subject to stringent manufacturing constraints. The knowledge about these constraints seems to be available to designers who have experienced the details of MEMS fabrication. In this paper, we put forth the idea of automatically generating a fabrication sequence for surface micro-machined MEMS components using the knowledge stored in grammar rules. As an analogy to CAD tools used in mechanical systems, we envision creating a tool which has the Pro-Engineer approach of determining fabrication sequences for a machine tool based on the final part shape. This tool could be an integral addition to the current MEMS design software so that the designers can freely draft devices and then allow an automated process to determine the fabrication sequence. In this paper we give a brief introduction about the graph grammars. Data from already designed MEMS components is extracted in the form of rules to create an expert system. We have also included an example of generation of the fabrication sequence for several MEMS components.

Graphical Fault Diagnosis Expert System of CNC Machine Tool Based on B/S

2014 ◽  
Vol 945-949 ◽  
pp. 1707-1712
Author(s):  
Bin Shen ◽  
Shu Yu Zhao ◽  
Jia Hai Wang ◽  
Juergen Fleischer
Keyword(s):  
Fault Diagnosis ◽  
Expert System ◽  
Machine Tool ◽  
Case Based Reasoning ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Rule Based ◽  
Detailed Case ◽  
Case Based ◽  
Remote Fault Diagnosis

Based on the authors previous work of developing an expert system for fault diagnosis of CNC machine tool, this paper studied the theory and method of CNC remote fault diagnosis expert system based on B/S, and presents schema and structure of the expert system in detailed. Case based reasoning is used for the multi-alarm diagnosis, and rule based reasoning is used for single-alarm diagnosis. At last fault diagnosis expert system was designed and developed making use of C# and ASP.NET.

MS Windows GUI for Linear Spring Design

1993 ◽  
Author(s):  
T. Gary Yip ◽  
Ajay Patel
Keyword(s):  
Expert System ◽  
Design Process ◽  
User Interfaces ◽  
Graphical User Interfaces ◽  
Linear Spring ◽  
Design Software ◽  
Screen Space

Abstract Two versions of a Windows-based linear spring design software have been developed. They are presented here to illustrate how graphical user interfaces can enhance the flow of control of a design process. The software also demonstrates that optimized usage of screen space can make an expert system based design software more intuitive. The two software presented here illustrate that well conceived GUI’s can improve the productivity of a design engineer.

scholarly journals Using a graph grammar system in the finite element method

2013 ◽  
Vol 23 (4) ◽  
pp. 839-853 ◽  
Author(s):  
Barbara Strug ◽  
Anna Paszynśka ◽  
Maciej Paszynśki ◽  
Ewa Grabska
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Graph Grammar ◽  
Graph Grammars ◽  
The Finite Element Method ◽  
Computational Mesh ◽  
Composite Graph ◽  
Initial Mesh ◽  
Grammar Rules ◽  
Element Method

Abstract The paper presents a system of Composite Graph Grammars (CGGs)modelling adaptive two dimensional hp Finite Element Method (hp-FEM) algorithms with rectangular finite elements. A computational mesh is represented by a composite graph. The operations performed over the mesh are defined by the graph grammar rules. The CGG system contains different graph grammars defining different kinds of rules of mesh transformations. These grammars allow one to generate the initial mesh, assign values to element nodes and perform h- and p-adaptations. The CGG system is illustrated with an example from the domain of geophysics.

An expert system for hydro/aero-static spindle design used in ultra precision machine tool

2014 ◽  
Vol 30 (2) ◽  
pp. 107-113 ◽  
Author(s):  
Yingchun Liang ◽  
Wanqun Chen ◽  
Yazhou Sun ◽  
Nan Yu ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Expert System ◽  
Machine Tool ◽  
Precision Machine ◽  
Ultra Precision

Response Prediction of Static Modal Testing on Milling Machine Tool

2014 ◽  
Vol 606 ◽  
pp. 131-135 ◽  
Author(s):  
Norlida Jamil ◽  
Ahmad Razlan Yusoff ◽  
Muhammad Hatifi Mansor
Keyword(s):  
Machine Tool ◽  
3D Model ◽  
Natural Frequencies ◽  
Mechanical Test ◽  
Response Prediction ◽  
Modal Testing ◽  
The Finite Element Method ◽  
Excited Vibration ◽  
Good Consistency ◽  
Design Software

Milling is one of the most common manufacturing processes for automotive component, but its productivity is limited by chatter. This form of chatter is undesirable because it results in premature tool wear, poor surface finish on the machined component and the possibility of serious damage to the machine itself. Modal testing is a form of vibration testing which is able to determine the Frequency Response Function (FRF) of the mechanical test structures. In this paper, the main focus is to obtain natural frequency values for machine tool components in order to establish better conditions in the cutting process on the machine tool. For this purpose, a 3D model of the machine tool’s part is made using design software and exported to analysis software. Later on, the Finite Element Method (FEM) modal analysis was used to obtain the natural frequencies. The model is evaluated and corrected through an experimental modal test. In the experiment, the machine tool vibration is excited by impact hammer and the response of excited vibration is recorded. In the end, the result of both FEM and experimental shows a good consistency in comparison.

scholarly journals Improving design grammar development and application through network-based analysis of transition graphs

2016 ◽  
Vol 2 ◽  
Author(s):  
Corinna Königseder ◽  
Tino Stanković ◽  
Kristina Shea
Keyword(s):  
Spoken Language ◽  
Language Design ◽  
Automated Synthesis ◽  
Formal Representation ◽  
Support Design ◽  
Rule Application ◽  
Grammar Rules ◽  
Novel Method ◽  
Transition Graphs ◽  
Grammar Development

Design grammars enable the formal representation of a vocabulary and rules that describe how designs can be synthesized just as the grammar rules of a spoken language define how to formulate valid, i.e., grammatically correct, sentences. Design grammars have been successfully applied in numerous engineering disciplines and enable the automated synthesis of designs within a defined design language. Design grammar development, however, is challenging and lacks methodological support. In this paper, a novel method is presented that supports the development and application of design grammars using transition graphs. In these, nodes represent generated designs and edges represent grammar rules that transform one design into another. Rather than using a tree structure to represent the possible application of rules, transition graphs are automatically generated and used to help designers better understand the developed grammar. The grammar designer is given feedback on (a) the rules, and (b) rule application sequences. This feedback can be used to (a) improve the grammar, and (b) apply it more efficiently. Two case studies, a gearbox synthesis task and a sliding tile puzzle, demonstrate the method. The results show the feasibility of the method to support design grammar development and application.

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