Study on Fault-Tolerant Technique Based on Knowledge Modules of Hydraulic Fault Theory

Abstract

Fluid power transmission and control, fuzzy control and related fault-tolerant control technology, which have been widely used, as the core of control and power transmission. At the same time the hydraulic system is developing to be large-scale and complicated, which makes the high reliability and safety more and more important. There is no doubt that the researches conducted in the hydraulic system of fault tolerant control field will create significant value in application. This article summarizes the Knowledge Modules of Hydraulic Fault (KMHF), which is the necessary premise to carry out researches on the fault-tolerant techniques based on Knowledge Modules of Hydraulic Fault. On this basis, this article takes the pressure-flow compound control module as an example, introduces the principle design, analyzes the static and dynamic of their pressure /flow control unit. Especially, the paper employs the simulation tools-AMESim, to conduct simulation calculation and analysis of the pressure perception control module which is based on Knowledge Modules of Hydraulic Fault. Besides, this paper has carried out experiments on the automatic hydraulic drill platform to research the test fault-tolerant control performance of the pressure perception control module. The simulation and test results show that the new fluid fault-tolerant technique based on Knowledge Modules of Hydraulic Fault proposed in this article practically improves the reliability and safety of the hydraulic system, and has great value for application.