Topology Optimization for the Lightweight Design of Mechanical Leg of the Hydraulic Bipedal Robot

Due to the bulky legs of traditional hydraulic bipedal robots, movement is slow and limited in related areas. More research on lightweight design has been carried out at home and abroad, and at present the bipedal robot for lightweight design parts is rarely studied. Ultimately, adjustments can’t be fixed with the author’s experience in the post-processing section. This paper re-combs the relevant topology optimization methods. The structure design of mechanical thighs is introduced to construct the mathematical model of mechanical thighs lightweight optimization design. According to the topology optimization process, the weight reduction optimization design of the initial design geometric model of the mechanical leg with different unit densities and optimized minimum size was carried out, and four topologies with mass reduction of 535.4, 494.3, 423.8, and 569.2 g were obtained. According to the actual working conditions and machining process requirements, the third method is selected for the simulation and verification of the strength. Finally, compared to the machined configuration work, the simulation results verify the accuracy of the finite element model and the effectiveness of the optimization design.