Design of TID controller based on firefly algorithm for controlling the speed of a D.C. MotorGovind Kumar Rajput, Adesh Yadav, Ajay Kumar, Abhishek Gautam, Anand Tiwari, Naladi Ram Babu and Tirumalasetty ChiranjeeviE3S Web Conf., 184 (2020) 01038DOI: https://doi.org/10.1051/e3sconf/202018401038