基于Simulink和OPNET的NCS联合仿真平台的设计与开发

Design and Development of Cosimulation Platform for NCS Based on Simulink and OPNET

一款优秀的仿真平台是网络控制系统(NCS)的研究过程中十分重要的部分。现有的网络控制系统仿真平台已经难以满足需求。为了克服已有仿真平台的不足,提出了基于Simulink和OPNET的NCS联合仿真平台。利用了MATLAB引擎技术和命令行仿真技术,设计了联合仿真同步机制将Simulink和网络仿真软件OPNET有机结合,并详细阐述了该平台开发的关键技术。该联合仿真平台利用Simulink产生控制系统模型,利用OPNET模拟网络环境,增强了NCS仿真的灵活性和有效性,实现了对网络控制系统的实时仿真。最后,通过在无线网络环境下的仿真分析了信道中信噪比对系统稳定性的影响,从而验证了该联合仿真平台的有效性。

An excellent simulation platform plays an important role in the research of network control system （NCS）. The existing NCS simulation platform is difficult to meet the needs of researchers. In order to overcome the deficiency of existing simulation platform, a cosimulation platform based on Simulink and OPNET was proposed. The MATLAB engine and command-line simulation technology was used and the synchronization mechanism was designed to combine OPNET with Simulink. The key technology of the cosimulation was elaborated. Simulink and OPNET were utilized to simulate real time control and network performance separately. The cosimulation enhanced the effectiveness and flexibility of the simulation. Finally, the effects of the SNR to the stability of WNCS were obtained through simulations on cosimulation in order to verify the effectiveness of the cosimulation platform.