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在雷达领域最新技术进展的启发下,提出了一种新的概念——认知结构健康监测。认知结构健康监测是一种可以智能处理环境变化引起影响的结构健康监测系统:在先验知识及智能推理的基础上,通过调整系统输入及输出功能实现智能处理。并在此基础上提出了一种基于认知的Lamb波结构损伤检测方法,通过仿真进行了验证。铝板上的仿真结果表明,该方法能够在温度变化等干扰下准确地提取出与边界反射波混叠的损伤反射波,从而实现对边界附近损伤的检测。
Inspired by the latest advances in radar technology, a new concept called cognitive health monitoring is proposed. Cognitive structure health monitoring is a kind of structural health monitoring system that can intelligently handle the impact of environmental changes: based on prior knowledge and intelligent reasoning, intelligent processing is implemented by adjusting the system input and output functions. Based on this, a cognitive Lamb wave structure damage detection method is proposed and verified by simulation. The simulation results on the aluminum plate show that this method can accurately extract the damage reflection wave that is aliased with the boundary reflection wave under the interference of temperature changes and so on, so as to detect the damage near the boundary.