In the process industry, control valve stiction causes oscillations in the control loop, and this results in deterioration of control performance. Therefore, the sticking control valves are repaired during a scheduled plant shutdown maintenance. Until such permanent solutions are used, it is expected that the oscillations can be reduced with a low-cost approach; PID control parameter re-tuning is a suitable approach in this case. This study involves a method of compensating for control valve stiction. In particular, it aims to improve the control performance by tuning the parameters of normal PID controllers. We propose a method to search for the optimal PID parameter values based on control simulation using a stiction model. First, the stiction model and the process model are identified. Next, simulation is performed using a combination of the stiction model, process model and PID controller. Finally, the PID parameter values are optimized based on the assessment.

在过程工业中，控制阀的静摩擦会引起控制回路的振荡，从而导致控制性能下降。因此，在定期的工厂停工维护期间修复卡住的控制阀。在使用此类永久解决方案之前，预计可以通过低成本方法减少振荡；在这种情况下，重新调整 PID 控制参数是一种合适的方法。本研究涉及一种补偿控制阀静摩擦的方法。特别是，它旨在通过调整普通 PID 控制器的参数来提高控制性能。我们提出了一种基于使用静摩擦模型的控制仿真来搜索最佳 PID 参数值的方法。首先，确定静摩擦模型和过程模型。下一个，使用静摩擦模型、过程模型和 PID 控制器的组合进行模拟。最后，基于评估优化 PID 参数值。