关键词:
Energy utilization
摘要:
This paper investigates the variations of bipedal robot's dynamic property walking on compliant ground based on rigid-compliant coupling model. Firstly, the coupling dynamic rod model between a rigid bipedal robot and compliant ground is established. Next, the robot's off-line gait on rigid ground is planned based on ZMP (zero moment point) criterion. Then, the compliant ground model is built in ANSYS for modeling the coupling virtual prototype between robot and ground in ADAMS. Finally, simulations are performed to reveal the effect of ground compliance on bipedal robot's dynamic property. The simulation results indicate that: 1) as the ground compliance decreases, the displacement of COM (center of mass) along axis X decreases by 2.69%. 2) the left sole and right sole impact forces increase by 28.46% and 24.33%, respectively, while the average contact forces decrease by 11.71% and 9.69%. 3) the average torques of left ankle joint and right ankle joint decrease by 13.24% and 14.16%. Compared with rigid ground, if the bipedal robot walks on ground with higher compliance, the step length of robot should be decreased to obtain the equivalent result. In the meantime, the driving motor with grater output torque will be chosen, which might lead to more energy consumption. © 2016, Chinese Mechanical Engineering Society. All right reserved.