摘要
众所周知,对实际被控对象的模型辨识是进行良好控制的重要前提。本论文研究了一种开环辨识方法。被辨识的对象是膀胱恒温热灌注治疗仪模拟设备,对该对象进行了开环飞升曲线测试,根据记录的输出曲线,采用改进的面积法对被控过程的一阶惯性加时滞模型进行参数估计,得到被控对象的传递函数。然后,根据所得到的过程模型,进行PID参数整定并进行了闭环的控制试验。实验表明,此方法具有较好的辨识精度,对测量噪声不敏感,闭环控制实验也表明了该控制系统的可行性。
As well known, process identification is very important in process control. A Open-loop identification method is proposed in this paper. The identification object is a simulated facility with constant temperature hyperthermic perfusion treatment on bladder cancer. Open-loop step response is applied ,the process input and the resulted output response are logged, and the improved area method is adopted, from which the parameters of a first-order plus dead-time model can be estimated. Based on some PID tuning rule the closed loop experiments have been conducted. The experimental results have shown that the proposed method has good identification accuracy and is insensitive to the noise. Furthermore, the experiments of the closed loop control system have also indicated the design closed loop control system is valid.
出处
《自动化与信息工程》
2011年第1期5-8,共4页
Automation & Information Engineering
关键词
热灌注治疗
开环实验
模型辨识
参数整定
闭环控制
Hyperthermic Perfusion Treatment
Open-loop Control
Model Identification
Parameter Tuning
Closed Loop Control
