Abstract—This paper presents a new method of controlling the speed of PMDC motor with the auto tuning of parameters of the PID controller in the on-line speed control and also extracting the model of the closed loop system through LabVIEW. PID controllers provide robust and reliable performance for most systems if the PID parameters are tuned properly. This objective is achieved by using an auto tuning PID in three steps. In the first step, the PMDC motor-generator set is interfaced to Laptop using NI USB-6008 DAQ card. In the second step, the closed loop system is extracted through the LabVIEW system identification toolkit. In the third step, the PID parameters are obtained through the auto tuning procedure and speed controlling is done. The designed auto tuning PID controller realize a good dynamic behaviour of the DC motor, a perfect speed tracking with less rise and settling time, minimum overshoot, minimum steady state error and give better performance compared to the manual tuning PID controller.
 

Index Terms—PMDC motor, auto tune PID, NI USB-6008 DAQ card, LabVIEW, system identification tool kit, state-space model.

Cite: D. V. Pushpa Latha and Swati Devabhaktuni, "On Line Speed Control of PMDC Motor Using Auto Tuning PID through LabVIEW," International Journal of Electronics and Electrical Engineering, Vol. 1, No. 4, pp. 230-235, December 2013. doi: 10.12720/ijeee.1.4.230-235