Boundary Control of a Marine Riser Assuming Linear and Exponential Profiles for Surface Current

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AZIMI ARASTOO; SALEHI MANOUCHEHR; BAKHTIARI NEJAD FIROOZ

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Journal Paper

Paper Information

Journal: JOURNAL OF VIBRATION AND SOUND Year:2020 | Volume:9 | Issue:18 Page(s): 91-105

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Information Journal Paper

Title

Boundary Control of a Marine Riser Assuming Linear and Exponential Profiles for Surface Current

Author(s)

AZIMI ARASTOO | SALEHI MANOUCHEHR | BAKHTIARI NEJAD FIROOZ | Issue Writer Certificate

Keywords

Boundary Control

marine riser

Lyapunov&rsquo

s Method

Linear Profile

Exponential Profile

Abstract

This paper presents the use of Lyapunov direct method to Boundary Control of the upper end of the riser so as to reduce the top angle and transverse vibration of the riser during time-varying disturbances. Two cases are taken into account for analysis. In the first case, the surface current of sea is assumed to be linearly reduced from the sea surface to the sea bed; while, in the second case, the declination is exponential. In both cases, it is assumed that the current decreases to almost zero. To address the problem, a distributed parameter system is modeled with partial differential equation constrained to boundary conditions. As all control signals can be measured using sensors and/or can be calculated using the backward difference algorithm, the Boundary Control has the potential to be practically implemented. The Lyapunov direct method has also been utilized for stability analysis of the closed-loop system. Eventually, the efficiency and robustness of the proposed controller is verified, and a comparison is made between the related results of linear and Exponential Profiles.

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APA: Copy

AZIMI, ARASTOO, SALEHI, MANOUCHEHR, & BAKHTIARI NEJAD, FIROOZ. (2020). Boundary Control of a Marine Riser Assuming Linear and Exponential Profiles for Surface Current. JOURNAL OF VIBRATION AND SOUND, 9(18 ), 91-105. SID. https://sid.ir/paper/413432/en

Vancouver: Copy

AZIMI ARASTOO, SALEHI MANOUCHEHR, BAKHTIARI NEJAD FIROOZ. Boundary Control of a Marine Riser Assuming Linear and Exponential Profiles for Surface Current. JOURNAL OF VIBRATION AND SOUND[Internet]. 2020;9(18 ):91-105. Available from: https://sid.ir/paper/413432/en

IEEE: Copy

ARASTOO AZIMI, MANOUCHEHR SALEHI, and FIROOZ BAKHTIARI NEJAD, “Boundary Control of a Marine Riser Assuming Linear and Exponential Profiles for Surface Current,” JOURNAL OF VIBRATION AND SOUND, vol. 9, no. 18 , pp. 91–105, 2020, [Online]. Available: https://sid.ir/paper/413432/en

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