Online Dynamic Hybrid Broad Learning System for Real-Time Safety Assessment of Dynamic Systems

Real-time safety assessment of dynamic systems is of paramount importance in industrial processes since it provides continuous monitoring and evaluation to prevent potential harm to the environment and individuals. However, there are still several challenges to be resolved due to the requirements of time consumption and the non-stationary nature of real-world environments. In this paper, a novel online dynamic hybrid broad learning system, termed ODH-BLS, is proposed to more fully utilize the co-design advantages of active adaptation and passive adaptation. It makes effective use of limited annotations with the proposed sample value function. Simultaneously, anchor points can be dynamically adjusted to accommodate changes of the underlying distribution, thereby leveraging the value of unlabeled samples. An iterative update rule is also derived to ensure adaptation of the assessment model to real-time data at low computational costs. We also provide theoretical analyses to illustrate its practicality. Several experiments regarding the JiaoLong deep-sea manned submersible are carried out. The results demonstrate that the proposed ODH-BLS method achieves a performance improvement of approximately 8% over the baseline method on the benchmark dataset, showing its effectiveness in solving real-time safety assessment tasks for dynamic systems.

I. Introduction

Real-time safety assessment (RTSA), particularly in the context of instance-level cases, plays a pivotal role in industrial processes, aiming to continuously prevent potential harm to the environment and individuals. The dynamic nature of systems poses significant challenges to the smooth operation of modern process industries [1], [2], [3]. In general, safety assessment primarily focuses on the potential hazards that systems may pose to individuals, the environment, or property in the event of faults or anomalies [4], [5], [6]. These technologies provide timely alerts, enabling engineers and maintenance personnel to swiftly address issues [7], [8], [9].