作　　者： ; ; ; ; ;

机构地区： 广东电网公司

出　　处： 《中国电机工程学报》 2012年第29期116-122,I0017,共8页

摘　　要： 频域分析法是控制系统设计、分析和参数调整最经典的方法之一。理论上,对象或系统频域特性是通过以正弦波或余弦波频率信号为激励信号的频率响应实验获得。由于实际生产过程条件所限,经典的频率响应实验法难以实施,致使过程控制系统频率特性难以发挥其理论指导工业实践的优势。在计算机技术高度发展的今天,传统的频率响应以及系统或对象频率特性获取的方法得到了根本性的突破。该文提出了一种采用数字无源LCR振荡器从时域过程响应数据提取对象或系统的频率特性的方法,该方法为过程控制系统频率特性分析提供了一种较为简便和有效手段。仿真实验和实际应用结果表明了该方法的正确性和有效性。 Frequency domain analysis is one of the essential methods for control system design, performance analysis and parameter adjustment. Generally, plants and systems frequency characteristics can be obtained via the frequency responses with a series of sine or cosine excitation signal. Due to the limitation of actual situations, frequency response experiment is difficult to carry out. It leads to the result that frequency characteristic analysis can not play a key role of theoretical guidance in industrial applications. It has been achieved fundamental breakthrough in the traditional method of frequency responses, because the computer and electronic technology develop rapidly nowadays. A new method of frequency domain analysis was proposed, which can identify the frequency characteristics of plants or system from the data of process responses in time domain utilizing digital passive LCR resonators. The method recommended in this paper is more simply and effective. Simulations and applications results indicate that the method is valid and correct.

关 键 词： 频率特性 频域分析 无源 振荡器 阶跃响应 过程控制系统

领　　域： [自动化与计算机技术] [自动化与计算机技术]