Dynamic rotating speed fine tuning method for ship speed optimization
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A speed and ship technology, applied in the ship field, can solve the problems of unable to update the calculation amount of the model in real time, high efficiency, etc., and achieve the effects of avoiding repeated calculations, fine analysis, and improving efficiency
Pending Publication Date: 2022-03-29
震兑工业智能科技有限公司
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[0005] In view of the above analysis, the embodiment of the present invention aims to provide a dynamic speed fine-tuning method for ship speed optimization to solve the existing problems of inability to update the model in real time and large amount of calculation and low efficiency
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Embodiment 1
[0048] A specific embodiment of the present invention discloses a dynamic speed fine-tuning method for ship speed optimization, such as figure 1 shown, including the following steps:
[0049] S11: Preprocessing the ship's navigation data according to a fixed time period to obtain the processed navigation data;
[0050] Specifically, through the sensors installed on the ship in advance, the ship's navigation data is obtained, including: time stamp, wind speed, wind direction angle, stern draft, bow draft, main engine fuel inlet flow, main engine fuel outlet flow, actual speed and main engine speed.
[0051] Preferably, the fixed time period is an average time for crossing a sea area, for example, the fixed time period is set to 6 hours.
[0052] The preprocessing process of ship navigation data includes:
[0054] It should be noted that during actual collection, some illegal values often...
Embodiment 2
[0138] Taking a cargo ship sailing with a full load on the route from Kojus Christi (UTC-5) in the United States to Kaohsiung (UTC+8) in China as an example, the specific method of Embodiment 1 is used to fine-tune the speed.
[0139] Since there is only one load state, when dividing the working conditions, only the relative wind speed along the navigation direction is considered, and it is divided into 6 different working conditions, and the 8th order polynomial is used, and the 6 fitting models obtained are as follows: figure 2 As shown in , the hollow circles mark the minimum points.
[0140] Based on the actual voyage data, a total of 25 speed adjustments have been made during the entire voyage, and the adjusted positions are as follows: image 3 shown. Compared with the originally planned fuel consumption, the fuel consumption after the final speed adjustment reduces the carbon dioxide emission by 342.83 tons, saves 110.08 tons of fuel, and saves 4.11% of the total fuel...
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Abstract
The invention relates to a dynamic rotating speed fine tuning method for ship speed optimization, belongs to the technical field of ships, and solves the problems that a model cannot be updated in real time, the calculation amount is large and the efficiency is low in the prior art. Comprising the steps of preprocessing ship navigation data according to a fixed time period; dividing the processed navigation data into a plurality of groups of data corresponding to different working conditions by using a clustering algorithm; based on a polynomial function, introducing an index forgetting factor, and establishing a function relationship between the marine fuel consumption and the host rotating speed in each group of data to obtain a plurality of fitting models; the method comprises the following steps: acquiring current navigation data, clustering to obtain an actual working condition, acquiring a minimum value point closest to a current main engine rotating speed in a current main engine rotating speed set range in the current navigation data according to a fitting model corresponding to the actual working condition, and if the sea oil consumption at the minimum value point is less than the current sea oil consumption obtained according to the current main engine rotating speed, determining that the sea oil consumption is not less than the current sea oil consumption. If so, adjusting the current host rotating speed to a minimum value point, otherwise, keeping the current host rotating speed unchanged. And dynamic rotating speed fine tuning is realized.
Description
technical field [0001] The invention relates to the technical field of ships, in particular to a dynamic speed fine-tuning method for ship speed optimization. Background technique [0002] The speed performance of the ship is one of the important technical performances of the operating ship. The speed of the ship has a significant impact on the safety of the ship, the operating efficiency of the enterprise, and energy saving and consumption reduction. As the speed increases, the cost of fuel consumption also increases significantly. However, in order to ensure the timely delivery of goods and the completion of navigation tasks, the speed cannot be reduced without limit. Finally, under the combined effect of the two, the speed is usually stable within a certain range and cannot be carried out. Therefore, the purpose of reducing fuel consumption through fine-tuning of speed has become an important means of cost control. [0003] The existing speed optimization methods all est...
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