Abstract Natural gas odorization is a safety critical issue in natural gas distribution industries enabling early detection of leakage that lead to prevention of fatal accidents. Usually inefficient manually controlled bypass odorizers are used in most town border stations used in gas distribution networks. In this study, a feedforward control system is proposed for that comprises of three elements. A mass transfer model, correlation for bubble diameter estimation, and SVM-based model of final control element are the elements. The mass transfer model predictions are profoundly affected by bubble diameter estimation. Bubble size measurements are used to develop a correlation for bubble diameter estimation. A motor-actuated precision needle valve is used as the final control element of the control system. The valve characteristic curves were determined and used to develop an input-output model based on the support vector machine. Different experiments were conducted to evaluate the performance of the three elements separately. To assess the effectiveness of the control system, the operating conditions of a town border station was simulated experimentally for the duration of 24 h. Experimental data and controller calculations for odorant cumulative mass transfer showed a minimum and maximum relative absolute error of 0.4% and 9.10%, respectively that indicates the controller to be effective.

中文翻译：

---

天然气旁路加臭器的建模与控制

摘要 天然气加臭是天然气配送行业的一个安全关键问题，可以及早发现泄漏，从而预防致命事故。通常，在燃气分配网络中使用的大多数城镇边界站中使用效率低下的手动控制旁路加臭器。在这项研究中，提出了一个由三个元素组成的前馈控制系统。传质模型、气泡直径估计的相关性和基于 SVM 的最终控制元件模型是元素。传质模型预测深受气泡直径估计的影响。气泡尺寸测量用于开发气泡直径估计的相关性。电机驱动的精密针阀用作控制系统的最终控制元件。阀门特性曲线被确定并用于开发基于支持向量机的输入-输出模型。进行了不同的实验以分别评估三种元件的性能。为了评估控制系统的有效性，对城镇边境站的运行条件进行了 24 小时的实验模拟。气味累积传质的实验数据和控制器计算表明，最小和最大相对绝对误差分别为 0.4% 和 9.10%，表明控制器是有效的。对一个城镇边境站的操作条件进行了为期 24 小时的实验模拟。气味累积传质的实验数据和控制器计算表明，最小和最大相对绝对误差分别为 0.4% 和 9.10%，表明控制器是有效的。对一个城镇边境站的操作条件进行了为期 24 小时的实验模拟。气味累积传质的实验数据和控制器计算表明，最小和最大相对绝对误差分别为 0.4% 和 9.10%，表明控制器是有效的。