Fuzzy-Variable Gain PI Mode Control Applied to a Brushless AC Motor Drive
Fanambinantsoa Philibert Andriniriniaimalaza,
Nirinarison Jean Razafinjaka,
Charles Bernard Andrianirina
Issue:
Volume 4, Issue 1, February 2019
Pages:
1-10
Received:
10 December 2018
Accepted:
11 January 2019
Published:
27 February 2019
Abstract: More strategies were developed to control a Brushless Motor’s Speed. Among them, vector control is one of widely used. Variable Gain PI controller is developed and gives a performed control result. Fuzzy logic control is proposed to optimize the control system. In this paper, the system combines the performance of the Variable Gain PI and fuzzy logic controllers. All these strategies were simulated with Matlab and Simulink for comparison. Behind this, the main objective is to improve the best performance of the Fuzzy-Variable Gain PI mode control applied to a Brushless AC Motor drive where implementations, to an MSK23335 Board with a PM50 module and a 90W BLAC Motor, are shown to improve the result.
Abstract: More strategies were developed to control a Brushless Motor’s Speed. Among them, vector control is one of widely used. Variable Gain PI controller is developed and gives a performed control result. Fuzzy logic control is proposed to optimize the control system. In this paper, the system combines the performance of the Variable Gain PI and fuzzy log...
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Comparative Economic Analysis of Offshore Platform Decommissioning Methods
Saturday Ebigenibo Genuine,
Amusat Waheed Olaide
Issue:
Volume 4, Issue 1, February 2019
Pages:
11-15
Received:
21 January 2019
Accepted:
25 February 2019
Published:
18 March 2019
Abstract: In this work, three basic approaches for removing offshore facilities-piece small, piece large and single lift methods were considered and applied to six different platforms (A, B, C, D, E and F) using data obtained from Proserv Offshore. The aim is to ascertain the decommissioning costs, salvage values and the onshore real value of each platform in the future when decommissioning will take place. The decommissioning cost for piece large obtained was used to generate piece small and single lift decommissioning costs exploiting analytical method/using relevant relations. The annual interest rate was derived from the data which was provided for 2010 and 2014 and the future decommissioning costs for each method was estimated for all the six platforms. The decommissioning costs (in million US dollars (M$)) for the six platforms A, B, C, D, E and F with respective weights 2012, 15128, 42100, 54660, 112392 and 130178 tons for piece small method are respectively 25.1, 164.5, 851.7, 1321.3, 5051.4 and 6196.5. The salvage values (in M$) for these platforms using the piece small method are 105.76, 217.87, 468.04, 570.64, 1099.47 and 1169.77 respectively while the onshore real values after decommissioning are 80.66, 53.37, -383.66, -750.66, -3951.93 and -5026.73. Results were also obtained for the other two methods. Comparing the results of the different methods it was observed that the most appropriate decommissioning option for Nigeria offshore is piece large with decommissioning cost, salvage Value and onshore real value of 16.7 M$, 100.2 M$ and 83.5 M$ respectively for platform A.
Abstract: In this work, three basic approaches for removing offshore facilities-piece small, piece large and single lift methods were considered and applied to six different platforms (A, B, C, D, E and F) using data obtained from Proserv Offshore. The aim is to ascertain the decommissioning costs, salvage values and the onshore real value of each platform i...
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Discussion on Safety Management of Immersed Tunnel in Hong Kong-Zhuhai-Macao Bridge
Issue:
Volume 4, Issue 1, February 2019
Pages:
16-20
Received:
13 January 2019
Accepted:
26 March 2019
Published:
9 May 2019
Abstract: In the course of construction of Hong Kong-Zhuhai-Macao Bridge, many works were proceeded simultaneous, such as ballast water tanks and steel seal door removal and transshipment, ballast concrete pouring, site clearance, ventilation, lighting installation and so on. In this paper, we combined with the construction of the immersed tunnel to discuss the safety management, which can be a reference for similar projects.
Abstract: In the course of construction of Hong Kong-Zhuhai-Macao Bridge, many works were proceeded simultaneous, such as ballast water tanks and steel seal door removal and transshipment, ballast concrete pouring, site clearance, ventilation, lighting installation and so on. In this paper, we combined with the construction of the immersed tunnel to discuss ...
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