Vibration control for the offshore platforms with delayed control under irregular wave forces

Author

Zhang, Cheng-Ming ; Tang, Gong-You ; Liang, Yan-Jun

Author_Institution

Coll. of Inf. Sci., Ocean Univ. of China, Qingdao, China

fYear

2010

fDate

26-28 May 2010

Firstpage

1981

Lastpage

1984

Abstract

Vibration control for the offshore platforms with delayed control under irregular wave forces is investigated. By a transformation, the original system with time delay is reduced into a delay free system. The unknown external wave load disturbances are supposed to be generated by an exosystem which is estimated by using the Morison equation and ocean wave theory. The feedforward and feedback optimal active control law includes the delay memory term and can guarantee the performance and stability of the system with time delay. The effectiveness and feasibility of the presented control law is demonstrated by a numerical example of jacket-type offshore platform.

Keywords

feedback; feedforward; offshore installations; optimal control; stability; vibration control; Morison equation; delayed control; feedback optimal active control law; feedforward optimal active control law; irregular wave forces; ocean wave theory; offshore platforms; stability; vibration control; Control systems; Delay effects; Delay systems; Feedback; Force control; Ocean waves; Optimal control; Propagation delay; Stability; Vibration control;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Decision Conference (CCDC), 2010 Chinese

Conference_Location

Xuzhou

Print_ISBN

978-1-4244-5181-4

Electronic_ISBN

978-1-4244-5182-1

Type

conf

DOI

10.1109/CCDC.2010.5498864

Filename

5498864