机电系统控制基础课程实验中传递函数辨识方法及关键技术  

Identification method of transfer function and key technologies in Control Foundation of Electromechanical System course

作　　者：董惠娟[1] 隋明扬 王奕 彭高亮[1] 陈志刚[1] DONG Huijuan;SUI Mingyang;WANG Yi;PENG Gaoliang;CHEN Zhigang(School of Mechatronics Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学机电工程学院

出　　处：《实验技术与管理》2019年第11期36-39,44,共5页Experimental Technology and Management

基　　金：黑龙江省教育厅2017年度高等教育教学改革研究一般研究项目（SJGY20170676）

摘　　要：机电系统控制基础课程最重要的实验是机电系统传递函数的参数辨识。该文采用作者自行研制的硬件可配置、软件可编程、内容可扩展、多参数可调的设备,描述了基于扫频法获得机电系统数学模型传递函数和Bode图的辨识方法,以及影响辨识精度的3个主要关键技术:电枢电压输入与转速的标定方法、输出信号存储方法和时钟精度获取方法。给出了C#编程的关键程序代码和注释。通过该实验,揭示Bode图和机电参数的内在关联。The undergraduates majored in mechanical engineering are quite good at analyzing an engineering system from the sides of space, mechanism and motion. However, the main course, Basic Control of Mechanical and Electrical Systems, focuses on its model. The essential experiment of this course, the identification of transfer function, offers solution. In this work, the authors describe the identification method of both transfer function and Bode diagram using sweep frequency method. All experiments were carried out using a self-developed experiment device which is hardware configurable, software programmable, content expandable and multi-parameter adjustable. It is noted that there are three key technologies that affect the identification accuracy, being the calibration of voltage input and speed, the signal storage and clock accuracy acquisition. In addition, C# programmed key codes and annotations are provided by the authors. Through this experiment, the internal relationship between Bode diagram and electromechanical parameters is revealed in this work.

关 键 词：机电系统控制基础 传递函数 BODE图 扫频法 辨识精度 

分 类 号：TH-39[机械工程] TP273[自动化与计算机技术—检测技术与自动化装置]