基于观测器的液压系统健康状态评估方法研究

Reseach on Hydraulic System’s Health State Evaluation Method based on Observer

摘要:

为了实时评估液压系统的健康状态，提出了基于观测器的健康状态评估原理，利用解析模型、仿真模型和数据模型及其配合等方法进行液压系统标准模型的建立，联合实际液压系统的监测数据，构建液压系统的状态观测器。将实际系统的相关参数作为输入，实际监测点的输出与标准模型的输出进行特征分析与对比，在数据处理的基础上形成残差及其向量，运用数据分析方法计算系统健康度，并解析各元素及其耦合所映射的故障类型与故障程度，实现液压系统的故障定位与评估。最后，利用某型装备的起竖液压系统进行了应用举例，介绍了模型构建、故障模式与参数选择、残差构成及健康度计算的方法。所研究的状态评估方法对实时评估液压系统，及开展液压系统视情维修具有参考价值。

Abstract:

In order to promote condition-based maintenance for hydraulic system, the hydraulic system’s health state evaluation method based on observer was proposed. The observer build method was studied which including the analytical model , simulation model , data model and joint model. The health degree calculation for system, health assessment and fault location method based on the residual vector were analyzed. Combined with the dynamic data acquisition, health status evaluation can be realized. Result can lay a foundation for condition-based maintenance.