Multiple-objective Optimization of Serpentine Locomotion with Snake Robot by Using the NSGA
الموضوعات : فصلنامه شبیه سازی و تحلیل تکنولوژی های نوین در مهندسی مکانیک
هادی کلانی
1
(دانشجوی دکتری، قطب علمی رایانش نرم و پردازش هوشمند اطلاعات، دانشگاه فردوسی مشهد)
علیرضا اکبرزاده
2
(دانشیار، قطب علمی رایانش نرم و پردازش هوشمند اطلاعات، دانشیار، دانشگاه فردوسی مشهد.)
الکلمات المفتاحية: Snake-like robot, Serpentine locomotion, Kinematics, Dynamics, Serpenoid curve, NSGA Optimization,
ملخص المقالة :
This paper starts with developing kinematic and dynamic model of a snake shape robot in serpentine locomotion and finishes with actual experimentation. At the beginning the symmetrical and unsymmetrical serpenoid curves are introduced. Kinematics and dynamics of a snake robot on flat and inclined surfaces are obtained for a general n-link robot. SimMechanics toolbox of MATLAB software is employed to simulate the snake robot. Effects of serpenoid curve parameters on joint torques and progression of the snake robot are also investigated. Results indicate that by increasing the inclination angle of the surface, link length and numbers of links, joint torques are increased. NSGA multi optimization method is next utilized to obtain the unsymmetrical curve parameters resulting in minimum joint torques and maximum snake progression. Optimal solutions are presented in the form of Pareto front optimal. The optimization shows that the required range of parameters of snake robot's body curve for higher progression and less torque, is limited. Additionally, it is shown that by employing the unsymmetrical serpenoid curves the efficiency of snake robot can be increased. Finally, FUM-Snake I robot is employed to validate the theoretical results on a flat surface. The experimental results show that the proposed kinematics and dynamics model are reasonable.
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