Shaft power measurement for marine propulsion system based on magnetic resonances

Qin, Li; Zhou, Xincong; Yan, Gao; Cao, Pengju; Quan, Jianzhou; Li, Zhixiong

doi:10.1587/elex.9.1260

Cited by 7 publications

(7 citation statements)

References 2 publications

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“…The wave loading system can simulate the varying wave loads from vertical, horizontal and axial directions. The signal acquisition system adopts the Kongsberg Shaft Power Meter (MetaPower) to measure the shaft torque and power transferred from the main engines to the propellers [23]. Fig.…”

Section: Methodsmentioning

confidence: 99%

Robust global sliding model control for water-hull-propulsion unit interaction systems - Part 1: System boundary identification

Yan

Qin

et al. 2015

Teh. vjesn.

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Original scientific paper Unexpected severe hull deformation caused by the wave loads would significantly influence the dynamical behaviours of the propulsion system in large scale ships, resulting in degradation of the ship control performance. A new global sliding model control (GSMC) for marine water-hull-propulsion unit systems is proposed to obtain more accurate control performance in this paper. The GSMC was firstly employed to establish the marine propulsion control model with nonlinear uncertainties. In the GSMC model, the saturation function method is applied to eliminate chattering on the sliding surface. Then the Lyapunov stability criterion is adopted to confirm the stability of the control system. Following, for the first time, the boundary problem of the nonlinear model uncertainties were investigated quantitatively. The bounded nonlinear model uncertainties required in the proposed GSMC model, involving engine torque loss / variations, power transfer for various load conditions and shaft rotational speeds, were derived based on the experiments carried out on a marine shaft-line test-bed of the integrated propulsion system as well as a sea trial implemented for a running bulk carrier. An upper boundary of 1,85 % for the model uncertainty has been obtained, which would be introduced into the GSMC for the integrated marine propulsion system to derive the total control law realising the robust control of the system.Keywords: global sliding model control; nonlinear control model; marine propulsion system; uncertainties in marine propulsion system; water-hullprolusion unit interactions; Upravljanje izdržljivim globalnim kliznim modelom za interakcijske sustave voda-trup-pogonska jedinica -Dio 1: Prepoznavanje granice sustavaIzvorni znanstveni članak Nepredviđene jake deformacije trupa uzrokovane težinom valova mogle bi značajno utjecati na dinamičko ponašanje pogonskog sustava velikih brodova, rezultirajući slabljenjem upravljačke funkcije broda. U ovom se radu predlaže upravljanje novim globalnim kliznim modelom (GSMC) za brodske sustave voda-trup-pogonska jedinica u svrhu poboljšanja upravljačkih performansi. Taj GSMC najprije je primijenjen u razvijanju modela za upravljanje brodskim pogonom s nelinearnim nesigurnostima. U GSMC modelu primijenjena je metoda funkcije zasićenja za isključenje podrhtavanja na kliznoj površini. Zatim je pomoću Lyapunova kriterija stabilnosti potvrđena stabilnost upravljačkog sustava. Po prvi puta, granični problem nesigurnosti nelinearnog modela kvantitativno je istražen. Nesigurnosti graničnog nelinearnog modela potrebne u predloženom GSMC modelu, uključujući gubitak /varijacije zakretnog momenta motora, prijenos energije za različite uvjete opterećenja i brzine rotacije osovine, dobivene su na temelju eksperimenata provedenih na liniji brodski osovinski vod -probni stol integriranog pogonskog sustava kao i pokusne plovidbe na moru broda za prijevoz rasutog tereta. Postignuta je gornja granica od 1,85 % za nesigurnost modela, i ona bi se trebala unijeti u GSMC za integr...

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Section: Methodsmentioning

confidence: 99%

Robust global sliding model control for water-hull-propulsion unit interaction systems - Part 1: System boundary identification

Yan

Qin

et al. 2015

Teh. vjesn.

Self Cite

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“…The plotted figure is generally called a Nyquist diagram. Figure 1 shows battery chemical impedance on equivalent circuit elements both with a resistor component R and with a capacitance component C. Equation (1) shows the battery chemical impedance Z in Fig. 1 [4] and [5] .…”

Section: Principle Of Battery Equivalent Circuitmentioning

confidence: 99%

“…The battery is focused on a Ni-MH battery. A general purpose secondary battery which is widely used in marine use electric power equipment and devices can be replaceable from primary (disposable single-use) battery [1] . Major battery deterioration parameters are enumerated a battery load rate and cumulative energy amount, a battery state of charge (SOC) and a battery temperature.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Impedance and Statistical Voltage Analysis - Marine Use Application: Energy Storage Life Cycle

Sakamoto

2016

Marine Engineering

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“…Meanwhile, ships suffer from the wind, waves, and other kinds of excitation during navigation. As a result, the shaft-hull deformation coupled vibrations may be excited and, hence, the shaft responses are enlarged simultaneously [8]. Therefore, these external and internal excitations will complicate the dynamical response of the marine propulsion shaft.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Lumped-Mass Method on Coupled Torsional-longitudinal Vibrations for a Marine Propulsion Shaft with Impact Factors

Huang

Liu

Cao

2019

JMSE

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Severe vibrations of the marine propulsion shaft can evidently affect the dynamical response of the propulsion system and degrade the performance of a ship. As the vibration forms couples which interact with each other, a better understanding of the coupled vibrations is essential for dynamic prediction to improve the efficiency and reliability of the marine propulsion system. Thus, an investigation of the lumped-mass method for coupled torsional-longitudinal vibrations of the shaft is proposed. First, a theoretical solution for the coupled ordinary differential equations demonstrates the accuracy of the proposed lumped-mass model. This model allows for the bifurcation diagram and the Poincare surface, and transient accelerations of the coupled vibrations are numerically calculated. Furthermore, the impact factors including various length-diameter ratios, coupling stiffness coefficients, and damping coefficients are respectively discussed. These impact factors are found to affect the coupled vibrations to different extents through the comparison of the transient accelerations. Finally, an accurate and applicative lumped-mass method for the coupled torsional-longitudinal vibrations of the marine propulsion shaft has been obtained. An optimal design and vibration reduction of the shaft, considering the above-mentioned impact factors, can be achieved.

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Shaft power measurement for marine propulsion system based on magnetic resonances

Cited by 7 publications

References 2 publications

Robust global sliding model control for water-hull-propulsion unit interaction systems - Part 1: System boundary identification

Robust global sliding model control for water-hull-propulsion unit interaction systems - Part 1: System boundary identification

Electrochemical Impedance and Statistical Voltage Analysis - Marine Use Application: Energy Storage Life Cycle

Investigation of Lumped-Mass Method on Coupled Torsional-longitudinal Vibrations for a Marine Propulsion Shaft with Impact Factors

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