Applications of convex optimization in naval engineering

Antti Ritari

Applications of convex optimization in naval engineering

Julkaisun otsikon käännös: Konveksin optimoinnin sovelluksia laivanrakennustekniikassa

Tutkimustuotos: Doctoral Thesis › Collection of Articles

Abstrakti

Konveksi optimointi on epälineaarisen optimoinnin tyyppi, jolla on monia hyödyllisiä teoreettisia ja laskennallisia ominaisuuksia. Globaali optimi voidaan ratkaista erittäin tehokkaasti. Konveksin optimoinnin numeeriset menetelmät eivät edellytä alkuarvauksia tai parametrien säätöä. Tässä väitöskirjassa sovelletaan konveksia optimointia eräisiin epälineaarisiin optimointiongelmiin laivasuunnittelussa. Luvussa 2 esitetään työn teoreettinen tausta. Väitöskirja on kirjoitettu artikkelikokoelmana ja seuraavissa luvuissa esitetään tiivistelmät artikkeleiden tuloksista. Luvussa 3 esitetään laivan konseptisuunnitteluvaiheen mitoitusongelma geometrisena optimointiongelmana. Vaikka geometriset optimointiongelmat ovat ei-konvekseja, ne voidaan muuntaa suoraan konvekseiksi optimointiongelmiksi tinkimättä tarkkuudesta. Tämä muunnos luo mahdollisuuden nopeaan järjestelmätason optimointiin. Luvussa 4 tarkastellaan optimaalisten liikeratojen muodostamista energiarajoitteisille pinta-aluksille. Tässä luvussa esitetyt menetelmät mahdollistavat vakaiden konveksien optimointimenetelmien soveltamisen reaaliaikaisessa ympäristössä, jossa on tiukat suoritusaika- ja luotettavuusvaatimukset. Luvuissa 5 ja 6 mallinnetaan ongelmia, jotka sisältävät diskreettejä päätöksiä. Ensimmäinen ongelma liittyy laivan elinkaaren polttoaine- ja koneistojärjestelmän suunnitteluun ja toinen hybridivoimalähteen energianhallintaan.

Julkaisun otsikon käännös	Konveksin optimoinnin sovelluksia laivanrakennustekniikassa
Alkuperäiskieli	Englanti
Pätevyys	Tohtorintutkinto
Myöntävä instituutio	Aalto-yliopisto
Valvoja/neuvonantaja	Tammi, Kari, Vastuuprofessori Salazar, Mauro, Ohjaaja, Ulkoinen henkilö Coraddu, Andrea, Ohjaaja, Ulkoinen henkilö
Kustantaja	Aalto University
Painoksen ISBN	978-952-64-1970-1
Sähköinen ISBN	978-952-64-1971-8
Tila	Julkaistu - 2024
OKM-julkaisutyyppi	G5 Artikkeliväitöskirja

Tutkimusalat

konveksi optimointi
optimisäätö
laivanrakennustekniikka
merenkulku
energiajärjestelmien mallinnus

Pääsy asiakirjaan

http://urn.fi/URN:ISBN:978-952-64-1971-8

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title = "Applications of convex optimization in naval engineering",

abstract = "Convex optimization is a class of nonlinear optimization with many useful theoretical and computational properties. The global optimum can be computed very efficiently, even for largescale problems. The numerical solvers for convex optimization require no initial guesses or parameter tuning. This thesis focuses on applying convex optimization to model several important nonlinear problems in naval engineering. Chapter 2 presents the theoretical background for this work. The thesis is written as a collection of articles, and the remaining chapters summarize the results of the articles. Chapter 3 formulates conceptual-stage marine vessel design problems as geometric programs. Although geometric programs are nonconvex, they can be reformulated as convex problems with no sacrifice in fidelity. This reformulation creates a novel possibility for fast systemlevel design optimization. Chapter 4 considers the problem of generating time-optimal trajectories for energy-limited surface vessels. The convexification techniques developed in this chapter lay the path for employing computationally robust convex optimization methods in a real-time environment with strict runtime and reliability requirements. Chapters 5 and 6 model problems that include discrete decisions. The first problem deals with lifetime fuel and power system selection, and the second problem involves hybrid power source energy management.",

keywords = "convex optimization, optimal control, ship design, maritime transportation, energy system modeling, konveksi optimointi, optimis{\"a}{\"a}t{\"o}, laivanrakennustekniikka, merenkulku, energiaj{\"a}rjestelmien mallinnus, convex optimization, optimal control, ship design, maritime transportation, energy system modeling",

author = "Antti Ritari",

year = "2024",

language = "English",

isbn = "978-952-64-1970-1",

series = "Aalto University publication series DOCTORAL THESES",

publisher = "Aalto University",

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address = "Finland",

school = "Aalto University",

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TY - BOOK

T1 - Applications of convex optimization in naval engineering

AU - Ritari, Antti

PY - 2024

Y1 - 2024

N2 - Convex optimization is a class of nonlinear optimization with many useful theoretical and computational properties. The global optimum can be computed very efficiently, even for largescale problems. The numerical solvers for convex optimization require no initial guesses or parameter tuning. This thesis focuses on applying convex optimization to model several important nonlinear problems in naval engineering. Chapter 2 presents the theoretical background for this work. The thesis is written as a collection of articles, and the remaining chapters summarize the results of the articles. Chapter 3 formulates conceptual-stage marine vessel design problems as geometric programs. Although geometric programs are nonconvex, they can be reformulated as convex problems with no sacrifice in fidelity. This reformulation creates a novel possibility for fast systemlevel design optimization. Chapter 4 considers the problem of generating time-optimal trajectories for energy-limited surface vessels. The convexification techniques developed in this chapter lay the path for employing computationally robust convex optimization methods in a real-time environment with strict runtime and reliability requirements. Chapters 5 and 6 model problems that include discrete decisions. The first problem deals with lifetime fuel and power system selection, and the second problem involves hybrid power source energy management.

AB - Convex optimization is a class of nonlinear optimization with many useful theoretical and computational properties. The global optimum can be computed very efficiently, even for largescale problems. The numerical solvers for convex optimization require no initial guesses or parameter tuning. This thesis focuses on applying convex optimization to model several important nonlinear problems in naval engineering. Chapter 2 presents the theoretical background for this work. The thesis is written as a collection of articles, and the remaining chapters summarize the results of the articles. Chapter 3 formulates conceptual-stage marine vessel design problems as geometric programs. Although geometric programs are nonconvex, they can be reformulated as convex problems with no sacrifice in fidelity. This reformulation creates a novel possibility for fast systemlevel design optimization. Chapter 4 considers the problem of generating time-optimal trajectories for energy-limited surface vessels. The convexification techniques developed in this chapter lay the path for employing computationally robust convex optimization methods in a real-time environment with strict runtime and reliability requirements. Chapters 5 and 6 model problems that include discrete decisions. The first problem deals with lifetime fuel and power system selection, and the second problem involves hybrid power source energy management.

KW - convex optimization

KW - optimal control

KW - ship design

KW - maritime transportation

KW - energy system modeling

KW - konveksi optimointi

KW - optimisäätö

KW - laivanrakennustekniikka

KW - merenkulku

KW - energiajärjestelmien mallinnus

KW - convex optimization

KW - optimal control

KW - ship design

KW - maritime transportation

KW - energy system modeling

M3 - Doctoral Thesis

SN - 978-952-64-1970-1

T3 - Aalto University publication series DOCTORAL THESES

PB - Aalto University

ER -

Applications of convex optimization in naval engineering

Abstrakti

Tutkimusalat

Pääsy asiakirjaan

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