Robust mixed H2/H∞ active control for offshore steel jacket platform

This paper presents a robust mixed H 2 / H ∞ control method for wave-excited offshore jacket platforms. Its objective was to design a controller that minimizes the upper bound of the H 2 performance measure on platform dynamics satisfying some H ∞ norm bound constraint simultaneously. Based on mixed...

Full description

Saved in:
Bibliographic Details
Published in:Nonlinear dynamics 2014-10, Vol.78 (2), p.1503-1514
Main Author: Yang, Jia Sheng
Format: Article
Language:English
Subjects:
Automotive Engineering
Classical Mechanics
Control
Dynamical Systems
Engineering
Mechanical Engineering
Original Paper
Vibration
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents a robust mixed H 2 / H ∞ control method for wave-excited offshore jacket platforms. Its objective was to design a controller that minimizes the upper bound of the H 2 performance measure on platform dynamics satisfying some H ∞ norm bound constraint simultaneously. Based on mixed H 2 / H ∞ control theory and linear matrix inequality techniques, a novel approach to stabilize offshore platform vibration with constrained H 2 / H ∞ performances is proposed. Uncertainties of the wave excitation are considered in dynamic performance analysis of offshore platforms. A reduced mode offshore platform structure under wave excitation is analyzed, and simulations are used to verify the effectiveness of the proposed approach. Compared with existing H ∞ control methods, the proposed approach makes a significant improvement for dynamic performances of offshore platforms under random wave excitation.
ISSN:0924-090X
1573-269X
DOI:10.1007/s11071-014-1531-x