Study In Fault-tolerant Technique Based On Knowledge Modules Of Hydraulic Fault

With the continuous development of the modern industry and the improvement ofscience and technology, fluid power transmission and control, fuzzy control and relatedfault-tolerant control technology, which have been widely used, are at the core ofcontrol and power transmission. At the same time the hydraulic system is developing tobe large-scale and complicated, which makes the high reliability and safety of thesystem more and more important. There is no doubt that the researches conducted in thehydraulic system of fault tolerant control field will create significant value inapplication.At present, many experts and scholars at home and abroad have establishedcomparatively mature theory system on the research of fault-tolerance technology forcontrol system, with most research content focusing on the control system faulttolerance strategy and the design of the fault-tolerant controller. And researchesconducted on the hydraulic system are mainly about the design of fault-tolerantcontroller in the electronic control stage, while fewer are done on the hydraulic systempower stage of fault-tolerance. Therefore, in view of the inadequacies of the traditionalhardware redundant fault-tolerance and the analytical redundant fault-tolerance, thisarticle proposed the innovative concept of hydraulic system fault-tolerant techniquesbased on the Knowledge Modules of Hydraulic Fault. Researchers conducting directdetection, computing and judgment on the various anomaly information of the fluid, theresults can be directly used on driving the hydraulic fault-tolerant unit to executefault-tolerant tasks. Compared with traditional fault tolerance methods, the informationflow path in this method is shorter, and the real-time information processing ability isstronger. More importantly, it realizes the fault-tolerance in the power stage of thehydraulic system, and at the same time greatly simplifies the system structure.This article summarizes the fault mechanism of the common forms of the hydraulicfault, which is the necessary premise to carry out researches on the fault-toleranttechniques based on Knowledge Modules of Hydraulic Fault. On this basis, this articletakes the pressure-flow compound control module as an example, develops the principledesign, and analyzes the steady state and dynamic state of their pressure control unit andflow control unit. Finally, the author uses the simulation tools, AMESim, to conductsimulation calculation and analysis of the pressure perception control module which is based on Knowledge Modules of Hydraulic Fault. Besides, the author has carried outexperiments on the automatic hydraulic drill platform to research the actualfault-tolerant control performance of the pressure perception control module. Thesimulation and experimental results show that the new fluid fault-tolerant techniquebased on Knowledge Modules of Hydraulic Fault proposed in this article practicallyimproves the reliability and safety of the hydraulic system, and has great value forapplication.