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Real Time Implementation and Performance Analysis of LabVIEW Based PID and Cascade Controller for Level Control

Rishi Raj Saikia, Sandesh Andrade, Veeresh Sangamesh Muttagi

The primary aim of this paper is to implement software based (virtual instrumentation) feedback controller in LabVIEW for level control of a tank system. Conventional feedback PID controllers are not efficient in terms of meeting a good transient response and steady state error; hence a cascade methodology is also proposed. The response of the cascade control scheme is compared with that of the PID controller using performance criteria like IAE, ISE and also rise time, peak time, settling time are obtained for both methods using real time data. Both the controllers are implemented using NIcDAQ9138. Finally simulation is also done for the modeled process.