Research And Design Of Dependability Of Center Spatial Hydraulic Pressure Motor

The three axis table provides the movement platform for the missile guidance device, is the missile half in kind simulation essential equipment, I use the hydraulic pressure oil source system of the three axis table to take the spatial oil motor test equipment. As a servo power actuation important part, the center spatial hydraulic pressure servomotor has the important application value in multiple spindle hydraulic pressure simulation table. Because the center spatial oil motor three axis table system engineering is complex, supposes measures in a big way, uses the appropriate reliability design principle to carry on the comprehensive reliability design, to confirms the overall design plan the rationality as well as the deficiency has its necessity and the feasibility.This article first introduced the three axis table system overall construction design, in detail elaborated the system primary member composition, for example: oil source as well as electrically controlled system composition, inner edge and center frame as well as outer edge composition, pedestal actuation system as well as computer control system composition. According to the overall design plan, the overall system is composed by the oil source, the platform body as well as the computer control system three parts of series, moreover various subsystems interior primary member also adopts the series connected structure, thus the system reliable model established is the series connected model. Estimated to the system reliability, according to the system reliable target, uses the primary device to the system to count estimate law to carry on the estimate, according to estimates the result, may discover very clearly system failure rate and propose the reliability improvement program and the mentality to the system failure rate most majority of electrically controlled subsystem. The reliable estimate is from the unit to the system estimate, but reliability allocation then is from the system to the unit assignment, through using the cascade system proportion method of distribution carries on the reliable rational distribution to the system as well as the essential component, effective addressing its assignment problem. By the fault tree analytic method FTA as well as the fault model effective analytic method FMEA to the system fault analysis, has the direct help for analyzing as well as solving system failure .In the system reliability design safeguard aspect , fall volume design, redundancy design ,fault-tolerant design as well as reliability verification test and so on measure are introduced.This article systematically and comprehensively analyzes three big and key links of the center spatial hydraulic pressure motor system reliability to design: estimate and assignment, fault pattern as well as fault analysis as well as reliability design safeguard, in effectively address system reliability design question.