Low Impact Force and Energy Consumption Motion Planning for Hexapod Robot with Passive Compliant Ankles
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Motion planning plays an important role in the performance optimization of legged robots. This paper presents a method to minimize the impact force and energy consumption effectively by providing an integrated strategy of motion planning subject to velocity and acceleration constraints. The parameters defined for the motion planning are computed to generate the foot trajectory. A foot–terrain interaction model and an energy-consumption model are formulated to evaluate the contact force and power consumption for statically stable gaits. The proposed method has been implemented on a hexapod robot. The acceleration of foot landing is reduced, and constant velocity control of the trunk body with passive compliant ankles is achieved for reducing the impact force and energy consumption. Extensive experiments have been carried out, and the experimental results have demonstrated the effectiveness of the proposed method in comparison with a conventional method.
KeywordsMotion planning Impact force Energy consumption Hexapod Passive compliant ankles
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This study was supported in part by the National Natural Science Foundation of China (Grant No. 51575120/61370033), National Basic Research Program of China (Grant No. 2013CB035502), Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 51521003), Foundation of Chinese State Key Laboratory of Robotics and Systems (Grant No. SKLRS201501B, SKLRS20164B), Harbin Talent Program for Distinguished Young Scholars (No. 2014RFYXJ001), and the “111 Project” (Grant No. B07018).
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