en Identification and Estimation Identification and Estimation Research Paper Research Paper This paper addresses the experimental identification of a servo actuator which is used in many industrial applications. Because the system consisted of electrical and mechanical components, the behavior of the system was nonlinear. In addition, the under load behavior of this servo was different. The load torque was considered as the input and a two input-one output model was presented for this servo actuator. Special focus was given in order to present a simple model for this servo actuator. The comparison between simulation and experimental results showed the effectiveness of the propose model. The model can be applied as a reference for characterizing different designs and future control strategies. ARMAX,Identification,LOLIMOT,MLP,Modeling,Servo Actuator, 227 233 http://ijeee.iust.ac.ir/browse.php?a_code=A-10-648-1&slc_lang=en&sid=1 M. Maboodi maboodi@ee.kntu.ac.ir 180031947532846002295 180031947532846002295 Yes Dept. of Computer Engineering, Hashtgerd Branch, Islamic Azad University M. H. Ashtari h_ashtari@iust.ac.ir 180031947532846002296 180031947532846002296 No Faculty of Electrical and Computer Engineering, Mechatronics Dept., K.N. Toosi University of Technology M. Aliyari Shoorehdeli maliyari@eetd.kntu.ac.ir 180031947532846002297 180031947532846002297 No Faculty of Electrical and Computer Engineering, Mechatronics Dept., K.N. Toosi University of Technology