Parameter Estimation of Damped Compound Pendulum Using Bat Algorithm Mohd Sazli Saad, Luqman Nul Hakim Mat Deri, Z. Shayfull, S.M. Nasir and M. Fathullah MATEC Web Conf., 78 (2016) 01118 Published online: 07 October 2016 DOI: 10.1051/matecconf/20167801118