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Power Consumption Characteristics Research on Mobile System of electrically driven Large-Load-Ratio Six-Legged Robot

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Chinese Journal of Mechanical Engineering 2023年第1期36卷 237-267页

作者： Hongchao Zhuang Ning Wang Haibo Gao Zongquan Deng School of Mechanical Engineering Tianjin University of Technology and EducationTianjin300222China School of Information Technology Engineering Tianjin University of Technology and EducationTianjin300222China State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin150001China

The electrically driven large-load-ratio six-legged robot with engineering capability can be widely used in outdoor and planetary exploration.However,due to the particularity of its parallel structure,the effective utilization rate of energy is not high,which has become an important obstacle to its practical application.To research the power consumption characteristics of robot mobile system is beneficial to speed up it toward practicability.Based on the configuration and walking modes of robot,the mathematical model of the power consumption of mobile system is set up.In view of the tripod gait is often selected for the six-legged robots,the simplified power consumption model of mobile system under the tripod gait is established by means of reducing the dimension of the robot’s statically indeterminate problem and constructing the equal force distribution.Then,the power consumption of robot mobile system is solved under different working conditions.The variable tendencies of the power consumption of robot mobile system are respectively obtained with changes in the rotational angles of hip joint and knee joint,body height,and span.The articulated rotational zones and the ranges of body height and span are determined under the lowest power consumption.According to the walking experiments of prototype,the variable tendencies of the average power consumption of robot mobile system are respectively acquired with changes in duty ratio,body height,and span.Then,the feasibility and correctness of theory analysis are verified in the power consumption of robot mobile system.The proposed analysis method in this paper can provide a reference on the lower power research of the large-load-ratio multi-legged robots.

关键词： electrically driven Large-load-ratio six-legged robot Power consumption Mobile system

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Static Force Analysis of Foot of electrically driven Heavy-Duty Six-Legged Robot under Tripod Gait

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Chinese Journal of Mechanical Engineering 2018年第4期31卷 58-72页

作者： Zhen Liu Hong-Chao Zhuang Hai-Bo Gao Zong-Quan Deng Liang Ding State Key Laboratory of Robotics and System Harbin Institute of Technology College of Mechanical Engineering Tianjin University of Technology and Education

The electrically driven six-legged robot with high carrying capacity is an indispensable equipment for planetary exploration, but it hinders its practicability because of its low efficiency of carrying energy. Meanwhile, its load capacity also affects its application range. To reduce the power consumption, increase the load to mass ratio, and improve the stability of robot, the relationship between the walking modes and the forces of feet under the tripod gait are researched for an electrically driven heavy-duty six-legged robot. Based on the configuration characteristics of electrically driven heavy-duty six-legged, the typical walking modes of robot are analyzed. The mathematical models of the normal forces of feet are respectively established under the tripod gait of typical walking modes. According to the MATLAB software, the variable tendency charts are respectively gained for the normal forces of feet. The walking experiments under the typical tripod gaits are implemented for the prototype of electrically driven heavy-duty six-legged robot. The variable tendencies of maximum normal forces of feet are acquired. The comparison results show that the theoretical and experimental data are in the same trend. The walking modes which are most available to realize the average force of distribution of each foot are confirmed. The proposed method of analyzing the relationship between the walking modes and the forces of feet can quickly determine the optimal walking mode and gait parameters under the average distribution of foot force, which is propitious to develop the excellent heavy-duty multi-legged robots with the lower power consumption, larger load to mass ratio, and higher stability.

关键词： electrically driven Heavy-duty six-legged robot Tripod gait Force of foot Walking mode

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