联合优化传感器布局与网络参数,提升软体机器人形变预测精度。
Model-Free Co-Optimization of Manufacturable Sensor Layouts and Deformation Proprioception
- 不依赖物理模型,用数据驱动方式联合优化传感器位置与网络参数。
- 在多个软体机器人和可穿戴设备上实现更高形变预测精度。
- 兼顾预测准确性和制造可行性,适合实际工程应用。
柔性传感器在软体机器人和可穿戴设备中被广泛用于感知非规则形变。尽管监督学习可从传感器信号训练形状预测模型,但预测精度高度依赖于传感器布局,而该布局通常通过经验或试错确定。本文提出一种无模型、数据驱动的计算流程,联合优化柔性长度传感器的数量、长度及布置位置,以及形状预测网络的参数,以应对大范围非规则形变。与基于模型的方法不同,该方法仅依赖变形形状数据集,无需物理仿真模型,因此适用于多种机器人传感任务。流程引入可微分损失函数,同时考虑预测精度与可制造性约束。通过联合优化传感器布局与网络参数,显著提升形变预测精度,并保证实际可行性。在多个软体机器人和可穿戴系统上的数值与物理实验验证了方法的有效性与通用性。
原文摘要 · Abstract (English)
Flexible sensors are increasingly employed in soft robotics and wearable devices to provide proprioception of freeform deformations.Although supervised learning can train shape predictors from sensor signals, prediction accuracy strongly depends on sensor layout, which is typically determined heuristically or through trial-and-error. This work introduces a model-free, data-driven computational pipeline that jointly optimizes the number, length, and placement of flexible length-measurement sensors together with the parameters of a shape prediction network for large freeform deformations. Unlike model-based approaches, the proposed method relies solely on datasets of deformed shapes, without requiring physical simulation models, and is therefore broadly applicable to diverse robotic sensing tasks. The pipeline incorporates differentiable loss functions that account for both prediction accuracy and manufacturability constraints. By co-optimizing sensor layouts and network parameters, the method significantly improves deformation prediction accuracy over unoptimized layouts while ensuring practical feasibility. The effectiveness and generality of the approach are validated through numerical and physical experiments on multiple soft robotic and wearable systems.
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