关键词: 液压系统, 虚拟故障注入, 内外泄漏, 优化

Abstract:

Aiming at diverse representation of hydraulic system fault, that resulted in the appearance of difficult issues underlying fault traceable. Taking internal and external leakage of hydraulic cylinder as a typical fault example, the construction method of the underlying virtual fault information was studied and the virtual fault information was injected into the piston rod linear positioning system integrated simulation model, the effects and differences of the system response characteristics were obtained based on the virtual fault. Sensitivity analyses on a number of operating parameters of the system by means of orthogonal experimental design method (DOE), the key parameters that affected system performance were obtained. Furthermore, the key parameters of the system were optimized by constructing an optimal algorithm based on integrated time absolute error criterion (ITAE) and the results show that the optimized system response leads to decrease in the sensitivity faults. The method provides a reference to fault sources identification and anti-failure design of complex hydraulic systems.

Key words: hydraulic system, virtual fault injection, internal and external leakage, optimization