Grammatical evolution of technical processes

doctoral thesis

• Title (english): Gramatička evolucija tehničkih procesa
• Author: Tino Stanković
• Mentor: Dorian Marjanović (mentor)
• Committee member: Mario Štorga (predsjednik povjerenstva)
• Committee member: Dorian Marjanović (član povjerenstva)
• Committee member: Kristina Shea (član povjerenstva); strani drzavljanin: Nije dostupno
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2011-01-13, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)
• Universal decimal classification (UDC): 51 - Mathematics ; 62 - Engineering. Technology in general

Abstract

The aim of this thesis is to provide a support to the beginning of the conceptual development phase by offering designers the possibility to computationally synthesise technical processes in order to obtain operand transformation variants in the respect to known technological principles. To accomplish the aim the following objectives had to be met: a theoretical objective which considered the development of a method for generation of operand transformation variants; and an empirical objective as the implementation of the method as a computational tool built to a stage that allows verification of the research results. First, it was necessary to understand the phenomenon of problem solving and cognitive aspects of synthesis as a part of the problem solving activity. Then, the state-of-the-art review on the Computational Design Synthesis (CDS) [2] was conducted the purpose of which was the determination of theoretical and methodological background of the current research projects and the comparison and the systematization of those in order to focus this research. The efforts where turned to the exploration of the existent mathematical concepts which could be used for the modelling of technical processes and related synthesis method. Based on the findings from the field of CDS it was concluded to conceive the method as a knowledgebased with the solution emerging as a result of successive application of production rules in which the knowledge about technical processes and working principles is formalised. The theoretical objective concluded with the main scientific contribution of this thesis: (1) the creation of multigraph based formal model of technical process, (2) the definition of graphgrammar based formal model of technical process synthesis, (3) addition of stochastic search to technical process synthesis by applying grammatical evolution [3]. Within the empirical objective a computational tool was realised on the foundations of the developed method. During the research it was found that knowledge about technical processes still does not exists in the accessible open taxonomies or ontologies as per se, which required to propose (4) knowledge formalisation suggestions when defining the graph grammar of technical processes.

Abstract (croatian)

Teorija tehničkih sustava objašnjava tehničku evoluciju, konstruiranje i razvoj proizvoda kao odgovor na potrebe društva koje se mogu ostvariti tehničkim procesima. Takvo teleološko shvaćanje nalaže kao početni korak u razvoju koncepta novog proizvoda utvrđivanje tehničkog procesa kao procesa unutar kojega se sudjelovanjem tehničkoga proizvoda ostvaruju efekti potrebni za svrhovitu transformaciju operanada sukladno radnim principima na kojima se tehnički proces temelji. Cilj istraživanja u okviru izrade doktorskog rada jest kreiranje računalne podrške upravo za taj početni korak konceptualne faze razvoja proizvoda. Generiranje varijanti transformacije operanada računalnom mogu stvoriti osnovu koja će poslužiti za temeljitije razmatranje mogućnosti za realizaciju tehničkoga proizvoda. Sukladno znanstveno-istraživačkoj metodologiji prisutnoj unutar područja znanosti o konstruiranju, istraživanje u okviru ovoga rada provedeno je unutar dvije faze: teoretska faza koja obuhvaća definiranje metode za generiranje varijanti transformacije operanda temeljem poznatih radnih principa, i praktična faza koja obuhvaća razvitak računalnog alata na osnovu definirane metode do razine koja će omogućiti potvrđivanje rezultata istraživanja. Teoretska faza istraživanja zaključena je sa glavnim znanstvenim doprinosima ove disertacije: (1) definiran je formalni model tehničkog procesa, (2) definiran je formalni model sinteze tehničkih procesa temeljen na graf-gramatikama, (3) uvedena je mogućnost pretraživanja varijanti transformacije koristeći se algoritmom gramatičke evolucije [3]. Praktična faza ovoga istraživanja rezultirala je računalnom implementacijom definirane metode za generiranje varijanti transformacije operanada u okruženju za tu svrhu osmišljenog i razvijenoga računalnoga alata. Tijekom istraživanja utvrđeno je da generalizirano i sistematizirano znanje o tehničkim procesima i radnim principima unutar područja još uvijek nije dostupno u obliku dovoljno detaljne taksonomije ili ontologije za razinu koju zahtijeva definirana metoda. Iz tog razloga predložene su smjernice za graf-gramatičku formalizaciju znanja o tehničkim procesima i radnim principima (4).

• Keywords: operand transformation variants; formal model of technical process; formal model of technical process synthesi; computational design synthesis; graph-grammar and grammatical evolution
• Keywords (croatian): varijante transformacije operanada; formalni model tehničkoga procesa; formalni model sinteze tehničkoga procesa; računalom podržana sinteza proizvoda; graf gramatike; gramatička evolucija
• Language: english
• URN:NBN: urn:nbn:hr:235:365436
• Study programme: Title: Mechanical Engineering and Naval Architecture; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje tehničkih znanosti (doktor/doktorica znanosti, područje tehničkih znanosti)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-05-15 18:14:10