Application Development Of Multi-channel Signal Generator Based On LabVIEW

According to the requirement of power system simulation experiment, this paperputs forward a new idea of designing a multi-channel signal generator which speciallyused in laboratory: based on the SEED-DEC2812 develop board, adopting Digital SignalProcessing(DSP) technique to construct hardware system, which controlled the hardwaresystem by the application on the PC;adopting Universal Serial Bus(USB) technique tocommunicate them. Thereby it can produce multi-waveform and multi-channel outputsignal whose frequency and amplitude,phase can be changed freely in some range.The paper dissects the method and process of developing application withLabVIEW in detail, and solves the problem of calling a USB driver which is notsupported directly by LabVIEW, through experiments to solve the multi-channel signalgenerator's communication and data transmission. Finally, this paper discusses theproblem of wave distortion after the PWM output processed by filter circuit, and putsforward a method to equalize waveform, and then proves the feasibility of the method bysimulation experiment.Li Ying (Electric Power System and its Automation)...