可持续压缩空气系统的气动故障监测与控制

Massimo Borg, Paul Refalo, Emmanuel Francalanza
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引用次数: 0

摘要

近年来,为实现碳中和工业,工业领域的可持续发展得到了广泛探索。压缩空气系统广泛应用于工业领域。在这一范围内,已经研究了许多节能改进措施,因为泄漏导致这些系统效率低下。尽管如此,如何利用不同的优化技术来减轻故障影响仍有待观察。本研究展示了如何利用不同的时域指标(包括平均值和标准偏差)对多执行器系统进行故障监测。随后还探讨了在执行压力和流量控制策略时的系统行为,以最大限度地减少故障影响。使用指标数据进行故障监测取得了成功。例如,当发生 1 毫米泄漏时,消耗量增加了 34%,压降的标准偏差降低了 6%,平均启动时间缩短了 13%。虽然压降平均值有助于故障监测,但包括标准偏差在内的其他压力指标也提供了额外的监测能力。在监测过程中还发现,传感器精度的提高可减少读数变化,获得更确凿的结果,并识别出更小的故障。由于故障得到了准确识别和定性,因此可以通过调整压力和流量来减轻其影响。结果证明是有希望的,因为这两项措施分别使空气消耗量减少了 16% 和 11%。虽然这种调整使生产率降低了 2-5%,但前面提到的节约效果超过了这一降幅。这项工作凸显了开发故障监测和控制系统的必要性,这些系统可以保持气动系统的生产率和能源性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Pneumatic Fault Monitoring and Control for Sustainable Compressed Air Systems

Sustainable development in the industrial sector has been widely explored in recent years, to achieve a carbon-neutral industry. Compressed air systems are widely used in the industrial sector. Numerous energy-saving improvements have been studied within this scope, as leaks make these systems inefficient. Nevertheless, it has yet to be seen how different optimisation techniques can be utilised to mitigate fault effects. This study shows how fault monitoring was performed on a multi-actuator system, using different time domain indicators including, mean and standard deviation. This was followed by exploring the system behaviour when pressure and flowrate control strategies were executed to minimize fault impacts. Fault monitoring, using the indicator data, was successful. For instance, as a 1 mm leak was induced and the consumption increased by 34%, the standard deviation in pressure drop reduced by 6% and the mean actuation time decreased by 13%. Though the mean in pressure drop was useful for fault monitoring other pressure indicators, including standard deviation, provided additional monitoring capabilities. During this monitoring exercise, it was also found that improved sensor accuracy resulted in less reading variations, obtaining more conclusive results and identifying faults of smaller sizes. As faults were accurately identified and characterised, it was then possible to mitigate their effects via pressure and flowrate adjustments. Results proved promising, as both contributed to air consumption decreases of 16% and 11%, respectively. Although such modifications decreased the production rate by 2-5%, the previously mentioned savings outweighed this decrease. This work highlights the need for development of fault monitoring and control systems which maintain the productivity and energy performance of pneumatic systems.

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