基于myDAQ和Multisim的信号与系统实验设计

Experiment Design of Signal and System Based on myDAQ and Multisim

针对传统信号与系统实验内容单一、实验方式固化、灵活性不够的缺陷,提出基于myDAQ和Multisim相结合的实验设计方法。首先根据实验要求设计电路,利用Multisim搭建所设计的电路,根据仿真结果对器件参数进行调整,并在面包板上准确搭建电路。然后通过myDAQ合成需要的输入信号,将该信号输出至面包板作为实际电路的输入信号,实际电路的输出信号通过myDAQ及配套的软件返回至计算机显示。最后在计算机上将Multisim的仿真结果与实际电路的输出结果进行比较,再次调整参数,进一步优化电路。实践表明,该方法很好地结合了软件仿真和硬件实验,加深了学生对相关理论原理和应用的理解,提高了学生自主实验的能力。

For the defect of simplicity and inflexibility of traditional experiment for the eourse of signal anti system, an experiment design method based on the combination of myDAQ and Muhisim is proposed. Firstly, the circuit is designed based on the experimental requirements, then the circuit is constructed by Muhisim. The cireuit is buih on tile breadhoard, and using the simulation results, the parameters of the components are adjusted. After timt, a signal is synthesized by myDAQ, and is used as input signal to breadboard, then the output of the aetual circuit is displayed on the computer by the myl）AQ and related software. Finally, by comparison of the simulation results and the output resuhs in the real circuit, the parameters are adjusted and the real circuit is further optimized. Practice shows that the software simulation anti hardware experiment are good combined, the students can understand tile principles anti applications of the related theory well than before and their ability of independent experiment is improved.