Emulation and simulation of dynamic weighting signal

This paper discusses the researching process of simulating dynamic weighting signal in the aspect of signal on MATLAB, based on the conception and researching method of virtual instrument. The signal simulation includes parts of the production line, the mechanism of balance (a Second-Order Underdamped System), response of object, response of the mechanism and power frequency noise. This paper analyzes the structure of dynamic weighting device and mathematical model of the signal simulation structure in the background of dynamic monitoring of dynamic weighting on packing production line. Virtual instrument function is designed on MATLAB, the simulating signal is generated by MCU, D/A converters and RS232 serial interfaces. Users can get signal from the output channel of virtual instrument signal source according to the signal¿s feature, and send the signal to electronic measuring unit, and perform debugging and studying. Comparation is made between the simulate signal and the filed signal.