中文摘要：

针对广泛应用的继电反馈自整定控制器辨识方法的局限性，提出一种基于锁相环原理的过程非参数模型辨识方法。以NI公司的虚拟仪器软件LabVIEW为开发平台设计了锁相环过程辨识系统，包括被控过程仿真器、PCI-6024E数据采集卡和锁相环辨识软件设计三部分。实践证明，该系统具有操作简单，辨识精度较高的特点，具有良好的应用前景。

英文摘要：

Aimed at the limitation of relay feedback identification in the auto-tuning controller, this paper proposes a non- parameter identification method based on phase-locked loop theory using LabVIEW developed by NI. The phase-locked loop identification system includes DSP, PCI-6024E board and phase-locked loop identification softwarq.＇. The practice shows that the system has the features of simple operation and high identification precision and has a good application prospect.