Ship's fin stabilizer H/sup 8/ control under sea wave disturbance

Abstract

In the absence of random sea wave disturbance, the roll attitude control has been used in engineering by means of fin stabilizer. This paper proposes a method to design the ship's fin stabilizer roll attitude control system using the H8control theory .The problems are solved that the shi 's fin stabilizer system the characteristics of ship's fin stabilizer control system.At the same time, a new method is proposed to solve the problem that frequency band of system object almost accords with frequency band of random sea wave disturbance.

Regulation of a Manned Sea-Surface Vehicle via Stochastic Optimal Control.

“…In order to test the proposed optimal algorithm, the ship parameters (k,¯, namely) have been taken from reference Sheng et al (1999), coming from real data: k =0:4874;=0:1850 with the control parameter p set equal to 1. The sea-wave uncertainties parameters are set as follows: Roll angle without control Roll angle under control Fig.…”

“…As a matter of fact, model (1) has been widely adopted in the¯eld of active¯n control, with the purpose of ship-roll reduction (e.g. Fortuna et al (1996), Sheng et al (1999), Haipeng et al (2003, Anantha et al 2007).…”

“…Despite of its quite simple structure, it provides an exhaustive model for small roll displacements, and it has been widely adopted in the¯eld of active¯n control with the purpose of ship-roll reduction. Reference papers, among the others, areFortuna et al (1996), where a pair of compensators are proposed: one designed by using classical frequency domain techniques, one obtained as an adaptive LQ compensator; H 1 and robust adaptive H 1 controllers are proposed in Sheng et al (1999) and Haipeng et al (2003), respectively;in Anantha et al (2007) a virtual instrumentation-based¯n active control is obtained.…”

Frequency-based model validation and parameter identification of a sea-surface vehicle

“…As a matter of fact, model (2.1) has been widely adopted in the¯eld of active¯n control, with the purpose of ship-roll reduction (e.g. [9], [20], [11], [1]).…”

“…Despite of its quite simple structure, it provides an exhaustive model for small roll displacements, and it has been widely adopted in the¯eld of active¯n control with the purpose of ship-roll reduction. We may cite, among the others, [9], where a pair of compensators are proposed: one designed by using classical frequency domain techniques, one obtained as an adaptive LQ compensator; H 1 and robust adaptive H 1 controllers are proposed in [20] and [11], respectively; in [1] a virtual instrumentation-based¯n active control is obtained. A key-role in building the model is played by the external disturbance torque of the sea waves acting on the watercraft.…”