Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. EPFL thesis
  4. Distributed State Estimation and Cooperative Path-Following Under Communication Constraints
 
doctoral thesis

Distributed State Estimation and Cooperative Path-Following Under Communication Constraints

Fernandes Castro Rego, Francisco  
2018

The main topics of this thesis are distributed estimation and cooperative path-following in the presence of communication constraints, with applications to autonomous marine vehicles. To this end, we study algorithms that take explicitly into account the constraints imposed by the communication channel, either by reducing the total number of messages per unit of time or quantizing the information with a reduced number of bits and transmitting it at a fixed rate. We develop a cooperative path following (CPF) algorithm with event-triggered communications and show both through simulations and sea trials with Medusa-class marine vehicles that the self-triggered cooperative path-following algorithm proposed yields adequate performance for formation control of autonomous marine vehicles, while reducing substantially the communications among the vehicles. By exploiting tools from quantized consensus theory, we also provide a method for cooperative path-following with quantized communications, and an algorithm for distributed estimation and control with quantized communications. The performance of the resulting systems is illustrated in simulations. A new methodology for the design of distributed estimators for linear systems is proposed that yields guaranteed stability in the case of collectively observable systems. The resulting algorithm only requires the broadcasting of each nodeâ s state estimate at each discrete time instant. We show via simulations that for some particular conditions the algorithm has a lower estimation error norm than other methods that use the same bandwidth and yields stable estimation errors for unstable systems. This thesis also proposes a distributed estimation and control algorithm with progressive quantization. We show that with an appropriate parameter choice and given that the system is collective detectable, the algorithm proposed yields a bounded estimation error and state for every agent, with bounds proportional to the process and measurement noise of the system. Finally, it is shown in tests with model cars that distributed estimation with quantized consensus is a feasible strategy for formation control using only range measurements between the vehicles.

  • Files
  • Details
  • Metrics
Type
doctoral thesis
DOI
10.5075/epfl-thesis-8626
Author(s)
Fernandes Castro Rego, Francisco  
Advisors
Jones, Colin Neil  
•
dos Santos Pascoal, António Manuel  
Jury

Prof. Alcherio Martinoli (président) ; Prof. Colin Neil Jones, Prof. António Manuel dos Santos Pascoal (directeurs) ; Prof. João Manuel Lage de Miranda Lemos, Prof. Fernando Manuel Ferreira Lobo Pereira, Prof. Alexandre Seuret (rapporteurs)

Date Issued

2018

Publisher

EPFL

Publisher place

Lausanne

Public defense year

2018-05-28

Thesis number

8626

Total of pages

257

Subjects

Distributed state estimation

•

Cooperative path-following

•

Quantized consensus

•

Event-triggered communications

•

Input-to-state stability

Note

Co-supervision with Instituto Superior Técnico (IST) da Universidade de Lisboa, Doutoramento em Engenharia Electrotécnica e de Computadores

EPFL units
LA3  
Faculty
STI  
School
IGM  
Doctoral School
EDRS  
Available on Infoscience
September 25, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/148575
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés