Fuzzy Pid Control System Based On Virtual Instrument Design

In this paper, graphical programming language LabVIEW of National InstrumentCompany of U.S. is regarded as the development platform, combining fuzzy logic moduleand PID control toolkit, the design process of a temperature control system is introduced,which includes the design of hardware and software.The system use NI PCI-7831R formeasurement and control applications.You can use graphical programming in LabVIEWand the LabVIEW FPGA Module to configure the FPGA (field-programmable gate array)on NI RIO devices.You can define the logic embedded in FPGA chips across the family ofRIO hardware targets without knowing low-level hardware description languages (HDLs)or board-level hardware design details.The application programs of data acquisition,fuzzy-PID control have been completed on development environment of LabVIEW.Through the experiment, we can obtain drying box rising curves, also through theappropriate parameter tuning can get PID preliminary parameters. We can use MATLABSimulink to build simulation program, also can use the fuzzy logic module and simulationmodule of LabVIEW to build the simulation block of the system. Comparing with the PIDcontrol, the fuzzy-PID control is effective to improve the temperature of control system thesteady state capability and the steady state respond. As the response curve shown, thecontrol effects of the fuzzy-PID control are analyzed. From above analysis, the period ofdesign the fuzzy-PID controller is reduced. It has practical value for engineering.