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Analysis and Compensation of Delays in FF H1 Fieldbus Control Loop Using Model Predictive Control

机译:基于模型预测控制的FF H1现场总线控制回路中的延迟分析和补偿

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摘要

In this paper, delays in data acquisition, conversion, and transmission of measurements in Foundation Fieldbus channels are analyzed in detail. The bounds for these delays are established. For measurements used in open-loop applications (e.g. monitoring), proper time calibration of the received signals should be made to consider the delays. However, if the measurements are intended for feedback control purposes, appropriate compensation schemes have to be used to reduce the effects of the delays. Thus, for feedback control, sources of delay for a Foundation Fieldbus (FF) H1 network and DeltaV Distributed Control System (DCS) are identified and analyzed. A model predictive control (MPC) scheme is developed to compensate the delays. The effectiveness of the proposed scheme is demonstrated on a test bench consisting of industrial grade FF H1 devices and a controller under different network parameter configuration (hence, different delays). It is demonstrated that the MPC is a viable solution to compensate network induced delays in industrial control systems.
机译:在本文中,将详细分析Foundation Fieldbus通道中数据采集,转换和测量传输中的延迟。确定了这些延迟的界限。对于开环应用中的测量(例如监控),应对接收信号进行适当的时间校准以考虑延迟。但是,如果测量旨在用于反馈控制目的,则必须使用适当的补偿方案来减少延迟的影响。因此,对于反馈控制,基金会现场总线(FF)H1网络和DeltaV分布式控制系统(DCS)的延迟源得以识别和分析。开发了模型预测控制(MPC)方案来补偿延迟。在由工业级FF H1设备和控制器在不同网络参数配置下(因此,具有不同的延迟)组成的测试台上证明了该方案的有效性。实践证明,MPC是补偿工业控制系统中网络引起的延迟的可行解决方案。

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