scholarly journals Analysis and Treatment of Electrical Fault of Ship Windlass

2021 ◽  
Vol 2132 (1) ◽  
pp. 012042
Author(s):  
Yanyang Wang ◽  
Chongchong Liu ◽  
Linxiang Hu ◽  
Shuai Chen
Keyword(s):  
Simple Structure ◽  
Stable Operation ◽  
Electrical Failure ◽  
Failure Investigation ◽  
Ship Safety

Abstract This paper aims at the electrical failure of the ship anchor machine, the potential causes of the failure are summarized and summarized by analyzing the electrical principle of the anchor machine. After the on-site failure investigation, the cause of the failure is accurately located, so as to put forward a feasible plan for the use and daily maintenance of the ship anchor machine. Because of its simple structure, stable operation and easy maintenance, the anchor machine is used for anchoring and maintenance of ships. Port docking is very important for ship safety and is widely used on ships.

Research on Rope-Less Hoist System Driven by PMLSM

2011 ◽  
Vol 216 ◽  
pp. 539-543 ◽  
Author(s):  
Xu Dong Wang ◽  
Hai Chao Feng ◽  
Bao Yu Xu ◽  
Xiao Zhuo Xu
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Small Volume ◽  
Simple Structure ◽  
Experimental Results ◽  
Experimental Device ◽  
Stable Operation ◽  
Operation Performance ◽  
Technical Problems ◽  
Design Scheme

Rope-less hoist system driven by permanent magnet linear synchronous motor has the advantages of simple structure, small volume, high force, unlimited hoisting height and speed. So, it is attracting more attention, increasingly becoming a research hot and difficult in the vertical hoist field. In this paper, a design scheme of direct driving high-speed elevator is proposed according to the key technical problems of rope-less hoist system driven by PMLSM, and then a small-sized home elevator prototype is built. Experimental results show the safe and stable operation performance of the experimental device, which offers the reference for the further research and the development and application of PMLSM rope-less hoist system.

Characteristic Analysis of Permanent Magnet Linear Synchronous Motor for Rope-Less Hoist System

2013 ◽  
Vol 416-417 ◽  
pp. 139-143 ◽  
Author(s):  
Hai Chao Feng ◽  
Xu Dong Wang ◽  
Bao Yu Xu ◽  
Xiao Zhuo Xu
Keyword(s):  
Permanent Magnet ◽  
Small Volume ◽  
Simple Structure ◽  
Fem Analysis ◽  
Stable Operation ◽  
The Finite Element Method ◽  
Characteristic Analysis ◽  
Operation Performance ◽  
Synchronous Motors ◽  
Linear Synchronous Motors

Permanent magnet linear synchronous motors (PMLSMs) is the best driving motor for rope-less hoist system because of the advantages of simple structure, small volume, high force, unlimited hoisting height and speed. In this paper, the finite element method (FEM) is adopted to design a PMLSM with 16-pole 15-slot as a unit for rope-less hoist system. Through the FEM analysis, the EMF constant Ke and the force constant Kf of unit motor were got. Then a direct driving elevator prototype drove by the proposed PMLSM was built. Experimental results show the stable operation performance of the experimental device, having good prospects for the development and application.

Control of Clutch on DCT during Start Process

2011 ◽  
Vol 130-134 ◽  
pp. 357-360
Author(s):  
Hui Fang Kong ◽  
Xiu Ping Li ◽  
Wei Bao
Keyword(s):  
Simple Structure ◽  
Automatic Transmission ◽  
Transmission Efficiency ◽  
Transmission System ◽  
Mechanical Transmission ◽  
Stable Operation ◽  
Dual Clutch Transmission ◽  
The Core ◽  
Clutch Control ◽  
Start Process

Dual Clutch Transmission (DCT) is a new automatic transmission system, which overcomes the shortcomings of power break when shift of the automatic mechanical transmission (AMT) and not only inherit high transmission efficiency and simple structure of AMT, but also inherit small impact of hydraulic, non-power interruption characteristics of automatic transmission (AT). The core and difficulty is the clutch control in the start process, the control targets are not only to ensure the smoothness of the start process and stable operation of the engine, but also to ensure quickness[1].

A Comparison of Simple Structure Rotation Criteria in Temporal Exploratory Factor Analysis for Event-Related Potential Data

Methodology ◽  
2019 ◽  
Vol 15 (Supplement 1) ◽  
pp. 43-60 ◽  
Author(s):  
Florian Scharf ◽  
Steffen Nestler
Keyword(s):  
Factor Analysis ◽  
Exploratory Factor Analysis ◽  
Simple Structure ◽  
Ground Truth ◽  
Event Related Potential ◽  
Suitable Alternative ◽  
Factor Rotation ◽  
Rotation Methods ◽  
Simple Structure Rotation ◽  
Temporal Overlap

Abstract. It is challenging to apply exploratory factor analysis (EFA) to event-related potential (ERP) data because such data are characterized by substantial temporal overlap (i.e., large cross-loadings) between the factors, and, because researchers are typically interested in the results of subsequent analyses (e.g., experimental condition effects on the level of the factor scores). In this context, relatively small deviations in the estimated factor solution from the unknown ground truth may result in substantially biased estimates of condition effects (rotation bias). Thus, in order to apply EFA to ERP data researchers need rotation methods that are able to both recover perfect simple structure where it exists and to tolerate substantial cross-loadings between the factors where appropriate. We had two aims in the present paper. First, to extend previous research, we wanted to better understand the behavior of the rotation bias for typical ERP data. To this end, we compared the performance of a variety of factor rotation methods under conditions of varying amounts of temporal overlap between the factors. Second, we wanted to investigate whether the recently proposed component loss rotation is better able to decrease the bias than traditional simple structure rotation. The results showed that no single rotation method was generally superior across all conditions. Component loss rotation showed the best all-round performance across the investigated conditions. We conclude that Component loss rotation is a suitable alternative to simple structure rotation. We discuss this result in the light of recently proposed sparse factor analysis approaches.

Qualitative assessment of equipment failure cause finding and removal

2018 ◽  
pp. 116-126
Author(s):  
E. A. Vakulin ◽  
A. I. Zayats ◽  
V. A. Beklemeshev ◽  
V. A. Ivashkevich ◽  
V. A. Khazhiev ◽  
...  
Keyword(s):  
Production Condition ◽  
Real Life ◽  
Open Pit Mine ◽  
Qualitative Assessment ◽  
Open Pit ◽  
Quality Level ◽  
Equipment Failure ◽  
Operation Conditions ◽  
Failure Investigation

Investigation of failures is one of the critical activities of mining and haulage equipment operability assurance in mining. Maintaining failure investigation at the required quality level, it is possible to identify provisions, rules and procedures that should be revised or changed, operation conditions that should be improved, additional personnel training, if required, etc. Investigation of failures in mines is under responsibility of machine men and electricians of maintenance and operation services. In reality, factory management and setup for production condition weak concernment of these workers in quality investigation aimed at finding of sources of equipment failures. This article describes real-life results achieved in development and use of maintenance service operation, technology and management monitoring. The requirements are substantiated for quality improvement in failure cause finding and removal in mining and haulage equipment at Chernogorsky open pit mine, SUEK-Khakassia. Causes of the present quality of failure investigation by machine men of Chernogorsky Repair and Engineering Works and Chernogorsky open pit mine are revealed. The proposed recommended practices will improve quality of mining and haulage equipment failure investigation.

Wedding Ceremony of Prekmurje Slovenes in the General Slavic Background. 1. Ritual Structure

2018 ◽  
Vol 13 (3-4) ◽  
pp. 182-195 ◽  
Author(s):  
Aleksandr V. Gura
Keyword(s):  
Simple Structure ◽  
The West ◽  
Peripheral Area ◽  
Wedding Ceremony

The prenuptial arrangement in the relatively simple structure of the Prekmurje wedding ceremony is presented in a reduced, fragmentary form. The betrothal is poorly integrated into the ritual structure, which may indicate its late inclusion in the wedding rite. It gravitates towards matchmaking or to church announcement, sometimes betrothal is completely absent, but, by the same token, it demonstrates the terminological variety of nomination models that give the most different Slavic correspondences. Also, a set of the wedding name options well-known in other Slavic areas is widely presented here. The resemblance – in structure and ritual composition – of the Prekmurje wedding on the neighboring South Slavic tradition is not as evident as on the West Slavic one, especially Slovak. In this small peripheral area, not only a significant number of linguistic Slavic archaisms is concentrated, but also a surprisingly large number of cultural “splinters” from different Slavic regions, sometimes far from Prekmurje, are present.

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