Abstract
In the design of robotic arms, structural topology optimization considering variable configurations with high computational efficiency is still a challenging issue. In this paper, the worst case identification based topology optimization of a 2-DoF hybrid robotic arm is accomplished, and the presented work mainly covers: (1) efficient worst case identification; (2) optimization problem construction and (3) iterative criterion and filtering method with fast convergence. The forward kinematics are investigated to identify the workspace. Thereafter, the equivalent external load is proposed to unify the effect of axial load and shear by force analysis and compliance calculation. The worst case is the load case with maximum compliance and can be located efficiently by searching for the maximum equivalent external load. The optimization problem is constructed based on the solid isotropic material with penalization (SIMP) interpolation scheme. For links with multiple worst cases, the objective function is constructed as the weighted sum of compliance under each worst case. For better computational efficiency, the modified guide-weight method is used to solve the optimization problem. To eliminate the mesh dependence and checkerboard problem, a guide weight filtering method is proposed. Under the guidance of derived optimal topology, the CAD model of the hybrid robotic arm is presented. The effect of the optimization is testified through performance comparison in finite element analysis. The optimization method can derive the optimal topology with global validity within allowable computational time and the optimization approach can be applied to other hybrid robotic arms as well.
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References
Bendsøe, M.P.: Optimal shape design as a material distribution problem. Struct. Optim. 1(4), 193–202 (1989)
Bendsøe, M.P., Kikuchi, N.: Generating optimal topologies in structural design using a homogenization method. Comput. Methods Appl. Mech. Eng. 71(2), 197–224 (1988)
Ben-Tal, A., Nemirovski, A.: Robust truss topology design via semidefinite programming. SIAM J. Optim. 7(4), 991–1016 (1997)
Bi, W.Y., Xie, F.G., Liu, X.J., Luo, X.: Optimal design of a novel 4-degree-of-freedom parallel mechanism with flexible orientation capability. Proc. Inst. Mech. Eng. Part B J. Eng. Manuf. 233(2), 632–642 (2019)
Bruyneel, M., Duysinx, P., Fleury, C.: A family of MMA approximations for structural optimization. Struct. Multidiscip. Optim. 24(4), 263–276 (2002)
Chen, S. X., Ye, S. H.: Criterion method for the optimal design of antenna structure. Acta Mech. Sol. Sinica 5(4), 482–498 (1984)
Chen, S.X., Ye, S.H.: A guide-weight criterion method for the optimal design of antenna structures. Eng. Optim. 10(3), 199–216 (1986)
Chen X., Liu X. J., & Xie F. G.: Screw theory based singularity analysis of Lower-Mobility parallel robots considering the Motion/Force transmissibility and constrainability. Math. Prob. Eng. 2015, 487956 (2015)
Da Silva Smith, O.: Topology optimization of trusses with local stability constraints and multiple loading conditions—a heuristic approach. Struct. Optim. 13(2–3), 155–166 (1997)
Diaz, A., Sigmund, O.: Checkerboard patterns in layout optimization. Struct. Optim 10(1), 40–45 (1995)
Essiet, I.O., Sun, Y., Wang, Z.: Improved genetic algorithm based on particle swarm optimization-inspired reference point placement. Eng. Optim. 51(7), 1097–1114 (2019)
Fleury, C., Braibant, V.: Structural optimization: a new dual method using mixed variables. Int. J. Numer. Meth. Eng. 23(3), 409–428 (1986)
Fujii, D., Kikuchi, N.: Improvement of numerical instabilities in topology optimization using the SLP method. Struct. Multidiscip. Optim. 19(2), 113–121 (2000)
Haber, R.B., Jog, C.S., Bendsøe, M.P.: A new approach to variable-topology shape design using a constraint on perimeter. Struct. Optim 11(1–2), 1–12 (1996)
Jin, X., Li, G.X., Zhang, M.: Design and optimization of nonuniform cellular structures. Proc. Inst. Mech. Eng. Part C J. Mech. Eng. Sci. 232(7), 1280–1293 (2018)
Kharmanda, G., Olhoff, N., Mohamed, A., Lemaire, M.: Reliability-based topology optimization. Struct. Multidiscip Optim. 26(5), 295–307 (2004)
Liu, X.J., Li, Z.D., Chen, X.: A new solution for topology optimization problems with multiple loads: the guide-weight method. Sci. China Technol. Sci. 54(6), 1505–1514 (2011)
Liu, X.J., Wang, C., Zhou, Y.H.: Topology optimization of thermoelastic structures using the guide-weight method. Sci. China Technol. Sci. 57(5), 968–979 (2014)
Liu, X.J., Li, J., Zhou, Y.H.: Kinematic optimal design of a 2-degree-of-freedom 3-parallelogram planar parallel manipulator. Mech. Mach. Theory 87, 1–17 (2015)
Lombardi, M., Haftka, R.T.: Anti-optimization technique for structural design under load uncertainties. Comput. Methods Appl. Mech. Eng. 157(1–2), 19–31 (1998)
Luh, G.C., Lin, C.Y.: Optimal design of truss-structures using particle swarm optimization. Comput. Struct. 89(23–24), 2221–2232 (2011)
Luo, Y., Kang, Z., Luo, Z., Li, A.: Continuum topology optimization with non-probabilistic reliability constraints based on multi-ellipsoid convex model. Struct. Multidiscip. Optim. 39(3), 297–310 (2009)
Luo, X., Xie, F.G., Liu, X.J., Li, J.: Error modeling and sensitivity analysis of a novel 5-degree-of-freedom parallel kinematic machine tool. Proc. Inst. Mech. Eng. Part B J. Eng. Manuf. 233(6), 1637–1652 (2019)
Matsui, K., Terada, K.: Continuous approximation of material distribution for topology optimization. Int. J. Numer. Meth. Eng. 59(14), 1925–1944 (2004)
Panagant, N., Bureerat, S.: Truss topology, shape and sizing optimization by fully stressed design based on hybrid grey wolf optimization and adaptive differential evolution. Eng. Optim. 50(10), 1645–1661 (2018)
Rozvany, G.I.N., Zhou, M.: The COC algorithm, part I: cross-section optimization or sizing. Comput. Methods Appl. Mech. Eng. 89(1–3), 281–308 (1991)
Sedaghati, R., Tabarrok, B., Suleman, A., Dost, S.: Optimization of adaptive truss structures using the finite element force method based on complementary energy. Trans. Can. Soc. Mech. Eng. 24(1B), 263–271 (2000)
Sethian, J.A., Wiegmann, A.: Structural boundary design via level set and immersed interface methods. J. Comput. Phys. 163(2), 489–528 (2000)
Sigmund, O.: Morphology-based black and white filters for topology optimization. Struct. Multidiscip. Optim. 33(4–5), 401–424 (2007)
Smyl, D.: An inverse method for optimizing elastic properties considering multiple loading conditions and displacement criteria. J. Mech. Des. 140(11), 111411 (2018)
Stolpe, M., Svanberg, K.: An alternative interpolation scheme for minimum compliance topology optimization. Struct. Multidiscip. Optim. 22(2), 116–124 (2001)
Sui, Y.K., Yang, D.Q., Sun, H.C.: Uniform ICM theory and method on optimization of structural topology for skeleton and continuum structures. Chin. J. Comput. Mech. 17(1), 28–33 (2000)
Svanberg, K.: The method of moving asymptotes—a new method for structural optimization. Int. J. Numer. Meth. Eng. 24(2), 359–373 (1987)
Wang, X., Zhang, D., Zhao, C., Zhang, P., Zhang, Y., Cai, Y.: Optimal design of lightweight serial robots by integrating topology optimization and parametric system optimization. Mech. Mach. Theory 132, 48–65 (2019)
Xie, Y.M., Steven, G.P.: A simple evolutionary procedure for structural optimization. Comput. Struct. 49(5), 885–896 (1993)
Xie, F.G., Liu, X.J., Wu, C., Zhang, P.: A novel spray painting robotic device for the coating process in automotive industry. Proc. Inst. Mech. Eng. Part C J. Mech. Eng. Sci. 229(11), 2081–2093 (2015)
Xu, H.Y., Guan, L.W., Chen, X., Wang, L.P.: Guide-weight method for topology optimization of continuum structures including body forces. Finite Elem. Anal. Des. 75, 38–49 (2013)
Zillober, C., Schittkowski, K., Moritzen, K.: Very large scale optimization by sequential convex programming. Optim. Methods Softw 19(1), 103–120 (2004)
Acknowledgements
This work is supported by the National Key Scientific and Technological Project of China under Grant No. 2018ZX04018001, National Natural Science Foundation of China under Grant No. 91948301, and Beijing Municipal Science and Technology Commission under Grant No. Z181100003118003.
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Chong, Z., Xie, F., Liu, XJ. et al. Worst case identification based topology optimization of a 2-DoF hybrid robotic arm. Int J Intell Robot Appl 4, 136–148 (2020). https://doi.org/10.1007/s41315-020-00133-4
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DOI: https://doi.org/10.1007/s41315-020-00133-4