基于流体故障知识岛的液压系统容错技术研究

发布时间：2018-01-14 17:04

本文关键词：基于流体故障知识岛的液压系统容错技术研究　出处：《重庆大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着现代化工业的持续发展和科学技术的不断进步，流体传动、模糊控制和相关的容错理论得到了广泛的应用，并往往处于控制和动力传输的重要核心地位。同时液压系统正朝着大规模以及复杂化的方向发展，这些系统的高可靠性和安全性也显得越来越重要。毫无疑问，，液压系统的容错控制问题研究具有重大的应用价值。当前，国内外有诸多专家学者对控制系统的容错研究已经建立了较为成熟的理论体系，其中大部分研究内容集中在控制系统容错策略和容错控制器的设计，针对液压系统领域也主要是对电控级进行容错控制器设计，面向液压系统功率级容错的研究相对较少。因此，本文针对传统的硬件冗余容错和解析容错方法存在的不足，提出基于流体故障知识岛的液压系统容错技术这一创新理念。通过对流体中多种异常信息进行直接的感知、处理运算和判断，将结果直接用于驱动液压容错单元执行容错任务。这样和传统容错方法相比，信息流通路径更短，信息处理实时性强，更重要的是实现了液压系统功率级容错，同时还能大大简化系统的结构。本文首先对常见液压故障表现形式的故障机理进行归纳和总结，这是进行流体故障知识岛容错技术研究必要的前提。在此基础上，本文以流体故障知识岛压力流量复合控制模块为例进行了原理性设计，并对其中的压力控制单元和流量控制单元做了稳态和动态特性分析。最后利用仿真工具AMESim对自行设计的流体故障知识岛压力感知控制模块进行仿真计算分析，并在全液压自动钻机平台上进行了试验测试，对压力感知控制模块的实际容错控制性能进行了研究。仿真与试验的结果表明，本文提出的基于流体故障知识岛的新型液压容错技术切实提高了实际液压系统的可靠性和安全性，具有重要的实际应用价值。
[Abstract]:With the continuous development of modern industry and the progress of science and technology, fluid transmission, fuzzy control and related fault-tolerant theory have been widely used. And often in the control and power transmission of an important core position. At the same time, hydraulic systems are moving towards the direction of large-scale and complex, the high reliability and security of these systems is becoming more and more important. The research on fault tolerant control of hydraulic system has great application value. At present, many experts and scholars at home and abroad have established a more mature theoretical system for the fault tolerance of control systems, most of which focus on the design of fault-tolerant strategies and fault-tolerant controllers of control systems. Aiming at the hydraulic system field, the fault tolerant controller is mainly designed for the electronic control level, so the research of fault tolerance for the power level of the hydraulic system is relatively few. This paper aims at the shortcomings of the traditional hardware redundancy fault-tolerant and analytic fault-tolerant methods. This paper puts forward the innovative idea of fault tolerant technology of hydraulic system based on fluid fault knowledge island. By directly perceiving, processing and judging a variety of abnormal information in fluid. The result is directly used to drive hydraulic fault-tolerant unit to perform fault-tolerant task. Compared with the traditional fault-tolerant method, the information flow path is shorter, the information processing is real-time, and more importantly, the fault tolerance of hydraulic system power level is realized. At the same time, the structure of the system can be greatly simplified. In this paper, the fault mechanism of common hydraulic fault representation form is summarized, which is the necessary premise of fault tolerance technology of fluid fault knowledge island. On this basis. In this paper, the fluid fault knowledge island pressure and flow control module is used as an example to carry out the principle design. The steady and dynamic characteristics of the pressure control unit and the flow control unit are analyzed. Finally, the pressure sensing control module of the fluid fault knowledge island is simulated by using the simulation tool AMESim. Computational analysis. The experiment is carried out on the platform of the hydraulic automatic drilling rig, and the actual fault-tolerant control performance of the pressure sensing control module is studied. The results of simulation and test show that. A new hydraulic fault tolerant technique based on fluid fault knowledge island proposed in this paper improves the reliability and safety of practical hydraulic system and has important practical application value.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137

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