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首页> 外文期刊>Journal of Chemical Engineering of Japan >Timing analysis and a modified PID control algorithm of the fieldbus control system
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Timing analysis and a modified PID control algorithm of the fieldbus control system

机译:现场总线控制系统的时序分析和改进的PID控制算法

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摘要

The fieldbus control system (FCS) has been increasingly used in the process control area. This paper first shows the timing analysis of the fieldbus control loop by considering both communication and control tasks at the same time. As a result, the fieldbus control loop time was formulated, and the stability condition of the loop operation was represented with the loop time in the FCS. Then a modified PID control algorithm that is suitable for fieldbus devices was proposed to overcome varying communication delays. Finally, a fieldbus control loop was modeled and simulated to validate the timing analysis and the control algorithm. The simulation results showed that the control algorithm works well for the common processes having a first-order model with dead time and the stability of the fieldbus control loop can be assured under the unpredictable and varying time delays caused by the fieldbus.
机译:现场总线控制系统(FCS)已越来越多地用于过程控制领域。本文首先介绍了同时考虑通信和控制任务的现场总线控制回路的时序分析。结果,制定了现场总线控制回路时间,并以FCS中的回路时间来表示回路运行的稳定性条件。然后提出了一种适用于现场总线设备的改进型PID控制算法,以克服变化的通信延迟。最后,对现场总线控制回路进行建模和仿真,以验证时序分析和控制算法。仿真结果表明,该控制算法适用于具有死区时间的一阶模型的常见过程,并且在由现场总线引起的不可预测且变化的时延下,可以确保现场总线控制回路的稳定性。

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