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Оптимальная траектория движения позиционного электропривода

Оптимальная траектория движения позиционного электропривода

Abstract

Определена оптимальная траектория движения позиционного электропривода на примере механизма подачи стана холодной прокатки труб. Показано, что оптимальной формой кривой скорости является треугольник, а соотношение его сторон зависит от вида нагрузочной диаграммы, в частности от влияния главного привода прокатной клети, и не зависит от наличия люфта и упругости в системе. Данный тезис, доказанный аналитически, подтверждается результатами, полученными на математической модели, учитывающей влияние главного привода на привод подачи. Проведенная статистическая обработка осциллограмм, полученных на реальном объекте, позволила дать рекомендации по оптимальному управлению электроприводом подачи стана ХПТ-450. Исходя из полученных данных о том, что момент наброса нагрузки, обусловленный попаданием трубы в валки прокатной клети, происходит в промежутке (0,6…0,75)t ц, рекомендуемым соотношением времени пуска ко времени торможения является 2:1. Проведенная оптимизация траектории движения позволяет получить до 25 % больший среднеквадратичный момент за цикл подачи, что позволит увеличить производительность стана.

The article identifies the optimal path of position electric drive on the example of the pipe cold rolling mill feeding mechanism. It is shown that the optimum speed curve has a triangle form, and its aspect ratio depends on the load diagram, in particular on the influence of roll mill main drive and doesn’t depend on the yawn and system elasticity presence. This analytically proved thesis is verified by the results of the mathematical modelling with consideration of the main drive influence on the feeding drive. Statistical analysis of the waveforms taken on the real object allowed to recommend the optimal mill HPT-450 feeding mechanism electric drive control. On the assumption of the obtained data that load-on torque caused by the pipe encounter to the rolling mill rolls, takes place in the interval of (0.6…0.75)t cycle, recommended starting time for the deceleration time ratio is 2:1. Path optimization carried on allows to get up to 25 % more rms torque during the feeding cycle, so increasing the productivity of the mill.

Keywords

ОПТИМАЛЬНАЯ КРИВАЯ СКОРОСТИ,ПОЗИЦИОННЫЙ ЭЛЕКТРОПРИВОД,OPTIMUM SPEED PATH,POSITION ELECTRIC DRIVE

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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