@techreport{TR-IC-PFG-17-07, number = {IC-PFG-17-07}, author = {Luiz Fernando Cirigliano Villela \and Esther Luna Colombini}, title = {{Humanoid Robot Walking Optimization using Genetic Algorithms}}, month = {July}, year = {2017}, institution = {Institute of Computing, University of Campinas}, note = {In English, 15 pages. \par\selectlanguage{english}\textbf{Resumo} The problem of creating fast and stable walking for humanoid robots is a very complex one due to the large degree of freedom and the external variables involved. This work tackles this problem by using a model free approach where each joint is represented by a sinusoidal function of time. The parameters of the functions for all actuated joints are optimized using a genetic algorithm. Experiments were performed with a NAO robot in a simulated environment under V-REP. The optimized robot was able to walk at a speed of $54 cm/s$ in a straight line and for up to 200 meters without falling. Experiments were also carried out to evaluate the individuals capacity to adapt to different scenarios, such as walking up and down ramps. Results showed different movement patterns, a slower pace and more upright positions for the robot walking uphill. } }