提出一种实时机器人异常检测方法,提升复杂场景下故障识别能力。
A real-time anomaly detection method for robots based on a flexible and sparse latent space
- 用稀疏自编码器和掩码自回归流构建灵活低维潜在空间。
- 在抓取任务中比现有方法提升4.96%~9.75%的检测准确率,碰撞场景达19.67%提升。
- 推理速度低于1毫秒,适合动态环境中的实时安全系统。
随着机器人需在多样环境中高效运行,实时异常检测技术变得至关重要。然而,机器人领域的深度学习模型受限于训练数据少和信号特征噪声大。本文提出基于稀疏掩码自回归流的对抗自编码器模型(Sparse MAF-AAE),将掩码自回归流嵌入对抗自编码器以构建灵活的潜在空间,并利用稀疏自编码器聚焦关键特征,即使在特征空间有限时仍具有效性。实验表明,在随机摆放罐体的抓取任务中,该模型的受试者工作特征曲线下面积(AUC)比现有最优方法高出4.96%至9.75%;在与轻质物体碰撞的场景中,性能提升达19.67%。此外,该模型推理时间低于1毫秒,满足实时性要求。其能力使其适用于动态环境中基于机器学习的机器人安全系统。代码已开源:https://github.com/twkang43/sparse-maf-aae。
原文摘要 · Abstract (English)
The growing demand for robots to operate effectively in diverse environments necessitates the need for robust real-time anomaly detection techniques during robotic operations. However, deep learning-based models in robotics face significant challenges due to limited training data and highly noisy signal features. In this paper, we present Sparse Masked Autoregressive Flow-based Adversarial AutoEncoder model to address these problems. This approach integrates Masked Autoregressive Flow model into Adversarial AutoEncoders to construct a flexible latent space and utilize Sparse autoencoder to efficiently focus on important features, even in scenarios with limited feature space. Our experiments demonstrate that the proposed model achieves a 4.96% to 9.75% higher area under the receiver operating characteristic curve for pick-and-place robotic operations with randomly placed cans, compared to existing state-of-the-art methods. Notably, it showed up to 19.67% better performance in scenarios involving collisions with lightweight objects. Additionally, unlike the existing state-of-the-art model, our model performs inferences within 1 millisecond, ensuring real-time anomaly detection. These capabilities make our model highly applicable to machine learning-based robotic safety systems in dynamic environments. The code is available at https://github.com/twkang43/sparse-maf-aae.
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