简要地介绍了由荷兰Twente大学控制工程系研发的商业软件20-sim的主要功能、编程环境和仿真方法。在讨论自控类课程涉及内容广的基础上,提出利用20-sim软件进行建模与仿真.在实例模型中,首先利用20-sim建立了控制系统图标化模型.在此基础上,应用了自动控制技术中的最优状态反馈控制,仿真结果理想的显示了控制效果.由此可见,基于20-sim建模与仿真方法直观简便,为自控类课程的学习与应用提供了新的思路。 Briefly introduces the main function, programming environment and simulation method of commercial software 20-sim developed by Control Engineering Department of Twente University in the Netherlands. On the basis of discussing the wide range of topics covered in the course of self-control courses, this paper proposes modeling and simulation using 20-sim software.In the example model, the iconic model of the control system is first established by using 20-sim.On the basis of this, The best state feedback control in the control technology, the simulation result shows the control effect ideally.This shows that the 20-sim-based modeling and simulation method is intuitive and simple, which provides a new idea for the learning and application of the self-control course.