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在流程工业生产中,由于执行机构存在非线性,如迟滞、死区等,限制的控制回路的性能;控制回路中大约30%的振荡是由于执行机构引起的,而执行机构的迟滞现象是在流程工业中最普遍的问题;到目前为止,尽管已经有很多对迟滞现象的建模以及检测的尝试,但还是缺少在控制回路中对迟滞控制的研究。为了有效地降低迟滞现象对回路性能的影响,在已有迟滞模型的基础之上提出了开环噪声控制方法,滞环控制方法,PI控制方法3种最大限度地降低回路振荡的方法。前两种的基于补偿的思想。同时也分别讨论了这些方法的优缺点。仿真表明了这些方法的准确性与有效性,值得在实际工程中推广应用。
In process industrial production, the performance of the control loop is limited due to non-linearity in the actuator, such as hysteresis, dead zone, etc. About 30% of the oscillations in the control loop are due to the actuator, which hysteresis is caused by The most common problem in the process industry; until now, there has been a lack of research into hysteretic control in the control loop, despite the many attempts at modeling and testing hysteresis. In order to reduce the effect of hysteresis on loop performance effectively, three methods of open-loop noise control, hysteresis control and PI control are proposed to minimize the loop oscillation based on the existing hysteresis model. The first two are based on the idea of compensation. The advantages and disadvantages of these methods are discussed separately. The simulation shows the accuracy and validity of these methods and is worth popularizing and applying in practical engineering.