面向虚实结合的线性系统理论实验教学模式探索

Experimental Teaching Mode Exploration of Linear System Theory by Combining Virtuality and Reality

针对纯虚拟仿真模式存在实验结果理想化、实践综合性不足的局限性,基于“相似系统”原理提出一种虚实结合的线性系统理论实验教学模式。首先对真实实验装置分析其机理关系并建立被控对象数学模型,基于相似系统原理利用电子元器件设计模拟电路系统代替真实实验装置。然后,对建立的被控对象数学模型,在MATLAB软件平台进行控制算法设计与仿真分析。最后,综合利用NI USB-6008数据采集卡和OPC通信协议建立闭环控制系统,实现对控制算法的验证与分析。在实际教学过程中的应用效果表明,这种虚实结合的实验模式有助于增强学生对线性系统理论的理解,同时也锻炼了学生的理论联系实际的能力。

The simple virtual simulation mode has the limitations of idealized results and insufficient practice.In order to solve this problem,based on the similar system principle,this paper proposes a linear system theory experimental teaching model combining virtuality and reality.Firstly,the mechanism relationship of the actual experimental device is analyzed and the mathematical model of the controlled object is established.Based on the principle of similar system,an analog circuit system is designed using electronic components to replace the real experimental device.Then,aiming at the mathematical model of the controlled object,the control algorithm is developed and MATLAB simulation is performed for theoretical analysis.Finally,the closed-loop control system is established by integrating NI USB-6008 data acquisition card and OPC communication protocol,and the verification and analysis of the control algorithm are realized.The application results in the actual teaching process show that this experimental mode of combining virtuality and reality can help to enhance students’understanding of linear system theory,and at the same time exercise students’ability of linking theory with practice.