Structure design of six-component strain-gauge-based transducer for minimum cross-interference via hybrid optimization methods
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Cross-interference is an important performance index for multi-channel strain-gauge-based transducer. In this study, a comprehensive optimization model for minimum cross-interference while satisfying constraints of principal sensitivity and cross-sensitivity is presented for a six-component wheel force transducer (WFT) structure design. The WFT structure has a “T”-type elastic body other than the conventional Maltese cross-type. Based on structure finite element analysis and circuit analysis, the quantified principal sensitivity, cross-sensitivity, and cross-interference are discussed. Then, a mechanical-electrical multidisciplinary optimization model is constructed which has a complex objective function and many constraints. Trial computations show that this model has multiple local optimal points. Hybrid optimization methods including simulated annealing (SA) algorithm and sequence quadratic programming (SQP) algorithm are then adopted to obtain a better design. The optimization results reveal that, for the studied “T”-type transducer structure, relatively stronger lateral beam and weaker longitudinal beam are helpful to achieve low cross-interference. The performance of the optimized structure is verified by comparison with the benchmark structure and by stepwise loading. The presented comprehensive optimization model has good generality applicable to different-type multi-channel strain-gauge-based transducer structure design.
KeywordsStrain-gauge-based transducer Cross-interference Mechanical-electrical multidisciplinary optimization Hybrid optimization methods
This research is supported by China Academy of Aerospace Aerodynamics (Grant Number 201720141150) and National Science Foundation of China (Grant Number 50875024).
- Chao LP, Chen KT, (1997) Shape optimal design and force sensitivity evaluation of six-axis force sensors. Sensors Actuat. A-Phys 63(2): 105–112Google Scholar
- Hussein H A, Caldeira T, Gan D, Dias J, Seneviratne L, Dias J, (2013) Object shape perception in blind robot grasping using a wrist force/torque sensor. IEEE International Conference on ElectronicsGoogle Scholar
- Kang M K, Lee S, Kim J H, (2014) Shape optimization of a mechanically decoupled six-axis force/torque sensor. Sensors Actuat. A-Phys 209(3): 41–51Google Scholar
- Kim G S, (2007) Design of a six-axis wrist force/moment sensor using FEM and its fabrication for an intelligent robot. Sensors Actuat. A-Phys 133(1): 27–34Google Scholar
- Liu S A, Tzo H L, (2002) A novel six-component force sensor of good measurement isotropy and sensitivities. Sensors Actuat. A-Phys 100(2–3): 223–230Google Scholar
- Weiblen W, Hofmann T, (1998) Evaluation of different designs of wheel force transducers. SAE technical paper 980262Google Scholar