Multi-dimensional variational mode decomposition for bearing-crack detection in wind turbines with large driving-speed variations

Li, Zhixiong; Yu, Jiang; Guo, Qiang; Hu, Chao; Peng, Zhongxiao

doi:10.1016/j.renene.2016.12.013

Cited by 140 publications

(93 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(a) Engine parameter design. More than 98% of sea going ships are equipped with diesel engines as the main power sources [18]. The rated power and design voyage speed are key parameters in the proposed estimation method.…”

Section: Parameter Designmentioning

confidence: 99%

See 1 more Smart Citation

Estimation of Vessel Emissions Inventory in Qingdao Port Based on Big data Analysis

et al. 2018

Self Cite

View full text Add to dashboard Cite

Exhaust emissions from vessels have increasingly attracted attention in the continuously growing marine transport world trade market. The International Maritime Organization (IMO) has introduced a number of measures designed to reduce exhaust emissions from global shipping. As one of the busiest ports in the world, Qingdao port has been studied to propose possible support to the development of efficient emission reduction. In this study, a large amount data of emissions inventory in Qingdao port was used to predict its annual exhaust emissions, and hence, to help understand maritime pollution in Qingdao port. Bigdata analysis methodology was employed to perform accurate predictions on vessel emissions. The analysis results show that the emissions were dominated by container ships, oil tankers, and bulk cargo ships. The comparison between Qingdao port and other ports in emission control areas demonstrates the necessity of control measures for exhaust emissions. The adoption of shore power and efficient cargo handling seems to be a potential solution to reduce exhaust emissions. The findings of this study are meaningful for maritime safety administration to understand the current emission situation in Qingdao port, propose corresponding control measures, and perform pollution prevention.Symmetry 2018, 10, 452 2 of 11 technical data for regional ships and national sea transport, and the establishment of new specific fuel consumption (SFC) figures and emission factors for ship engines in general.Currently, the activity-based method has been applied for emission prediction in vessels [8]. Jalkanen et al. [9] computed the exhaust emissions of marine traffic in the Baltic Sea area based on the relationship of the instantaneous speed to the design speed, and the detailed technical information of the engines of the ships. An in-port ship activity-based methodology was applied by Tzannatos [10] for maneuvering and berthing of coastal passenger ships and cruise ships calling at the passenger port of Piraeus (Greece), in order to estimate the emission of the main ship exhaust pollutants (NO X , SO 2 , and PM 2.5 ) over a twelve-month period in 2008 and 2009. Shipping emissions in Candarli Gulf, Turkey, were calculated based on the energy consumptions of ships for every different stage which was called operation modes (cruising, maneuvering and hotelling), and detailed real-time activity data were used for calculations of shipping emissions in this study [11]. To estimate the exhaust emission from ocean-going vessels in Hong Kong, Yau et al. [12] collected complete data sets of ship activities, including arrival, departure, and activities during shifts between berths within the Hong Kong territory. The operational modes, including cruising, slow cruising in reduced speed zones, maneuvering and hotelling, were categorized based on the vessel speeds. Another Automatic Identification System (AIS) based emission inventory in Tianjin Port using a bottom-up approach was developed in 2016 [13]. The inter-monthly emission variations ...

show abstract

Section: Parameter Designmentioning

confidence: 99%

“…(b) Load factor. The load factor of ME was estimated based on the Propeller Law by Equation (4) [18].…”

Section: Parameter Designmentioning

confidence: 99%

Estimation of Vessel Emissions Inventory in Qingdao Port Based on Big data Analysis

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…They do not require guidance systems for wind, have low inertia, which allows them to take advantage of wind occurring in strong gusts and are very good in using the wind blowing in different planes. They do not also have the need of special bearings or gears, which are prone to failure in larger scale [23]. Therefore, the set up APS will consist of prototype carousel wind turbine with a 5-bladed rotor with active surface of 1.2 m 2 and a power of 500 W. The wind turbine has a structure consisting of the 5 blades of a characteristic shape attached to the axis of the turbine.…”

Section: Secondary Power Sourcementioning

confidence: 99%

The Concept of Autonomous Power Supply System Fed with Renewable Energy Sources

Fedak¹,

Anweiler²,

Ulbrich³

et al. 2017

J. sustain. dev. energy water environ. syst.

View full text Add to dashboard Cite

Sustainable economic development requires the use of renewable energy sources in a rational and thoughtful way. In Polish conditions the use of several types of renewable energy sources on a single setup is a new issue. In particular, hybrid devices in conjunction with intelligent energy systems, such as lighting systems are generally not used. Therefore, the Polish energy production still relies on the burning of coal. Despite their advantages, renewable energy sources are characterized by seasonality and considerable instability. Access to renewable energy varies daily and seasonally, hence activities promoting the use of autonomous, hybrid power systems must be intensified. The presented research aims at the development of the Autonomous Power Supply (APS) system based on the so-called energy mix. Such a system works in an isolated arrangement and serves to reliably supply electricity from renewable sources for small residential or public utility devices in an urban area. Systems with up to 3 kW power consist of modules, whose modular design allows the combination of various power configurations and types of renewable energy used. The basic system consists of a primary power source, additional power source, emergency power source, energy storage device, weather station and controller. The energy mix depends on the geographical location of the system. The emergency source can be implemented as an on-grid connector or fuel power generator with the participation of 100% until the primary or accessory power source failure is removed. The energy storage system consists of batteries or supercapacitors. The proposed system can be combined to create a local network that automatically responds to energy shortages in various network nodes by adjusting the supply of electricity within the network depending on its needs. For Poland realistic solutions in this article are the new and modern answer to these requirements.

show abstract

“…Owing to the high nonlinearity and coupling characteristics, the dynamic knowledge cannot be obtained exactly in many applications. 14 In this article, a robust adaptive control scheme is designed based upon TSM technique and radius basis function (RBF) neural network. In this scheme, the TSM combines position tracking error with velocity tracking error.…”

Section: Introductionmentioning

confidence: 99%

Neural network–based terminal sliding mode applied to position/force adaptive control for constrained robotic manipulators

Cao

Wang

Cao³

et al. 2018

Advances in Mechanical Engineering

View full text Add to dashboard Cite

This study considers the control problem of constrained robotic manipulators with dynamic uncertainties. A new force/ position control strategy is proposed based upon terminal sliding mode and neural network. The terminal sliding mode combines position tracking with velocity tracking, and the neural network estimates unknown dynamics. Then, an adaptive control law is utilized to ensure finite-time convergent performance of position tracking and boundedness of contacting force tracking. Compared with existing force/position control strategies, the proposed strategy ensures the convergent performance without nominal model of the system dynamics. Simulation analysis verifies that the proposed strategy is effective.

show abstract

Multi-dimensional variational mode decomposition for bearing-crack detection in wind turbines with large driving-speed variations

Cited by 140 publications

References 34 publications

Estimation of Vessel Emissions Inventory in Qingdao Port Based on Big data Analysis

Estimation of Vessel Emissions Inventory in Qingdao Port Based on Big data Analysis

The Concept of Autonomous Power Supply System Fed with Renewable Energy Sources

Neural network–based terminal sliding mode applied to position/force adaptive control for constrained robotic manipulators

Contact Info

Product

Resources

About