Adaptive fractional PID control of biped robots with time-delayed feedbackIEEE MEMBER, P Joel Perez, Jose P. Perez, Mayra Flores Guerrero, Ruben Perez P., Oscar Rangel Aguilar, Daniel Ramirez-V, Joey Perez F. and J. Javier Perez D.MATEC Web Conf., 277 (2019) 01007DOI: https://doi.org/10.1051/matecconf/201927701007