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A Multidisciplinary Reliability Modeling Method for Hydraulic Servo Mechanism Based on Fault Mechanism

A failure mechanism, hydraulic servo technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc.

Active Publication Date: 2018-07-13
BEIHANG UNIV
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Problems solved by technology

[0006] (1) Purpose: The present invention provides a multidisciplinary reliability modeling method for hydraulic servo mechanisms based on failure mechanism. In the case of reliability-related data, how to simultaneously inject multidisciplinary failure mechanisms into typical mechanical, electrical, and hydraulic systems, that is, hydraulic servo mechanisms, to truly and accurately describe the degradation curve of key parameters and the overall performance degradation curve

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  • A Multidisciplinary Reliability Modeling Method for Hydraulic Servo Mechanism Based on Fault Mechanism
  • A Multidisciplinary Reliability Modeling Method for Hydraulic Servo Mechanism Based on Fault Mechanism
  • A Multidisciplinary Reliability Modeling Method for Hydraulic Servo Mechanism Based on Fault Mechanism

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Embodiment Construction

[0079] The present invention is a multidisciplinary reliability modeling method of hydraulic servo mechanism based on failure mechanism, such as figure 1 Shown; The method is carried out according to the following five stages successively; The present invention adopts the connecting rod mechanism controlled by hydraulic pressure as a case, and the specific implementation is described in detail as follows:

[0080] Phase 1: System Modeling

[0081] System modeling is divided into the following three steps:

[0082] Step ⑴ Dynamic Mechanism Modeling:

[0083] In ADAMS, the 3D solid model of the connecting rod mechanism with the nominal size of the mechanism is first established. The solid model is shown in Figure 2; after that, constraints and kinematic pairs are added to the 3D model. The kinematic pair numbers in the ADAMS model are as follows: image 3 shown. Among them, the housing of the connecting rod mechanism is fixedly connected to the ground; the front and rear slid...

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Abstract

The invention discloses a multidisciplinary, long-periodic and reliable modeling method of a hydraulic servo mechanism based on a failure mechanism. The method is implemented by five stages: firstly, carrying out system modeling, namely carrying out dynamics mechanism modeling, dynamics mechanism parameterization and hydraulic system modeling; secondly, carrying out joint simulation, namely setting a joint simulation environment, building a joint simulation platform, selecting a joint simulation mode, setting a transfer function, and operating joint simulation; thirdly, injecting individual discipline failure mechanism and mode, namely injecting a failure mechanism of a dynamics mechanism and a hydraulic system failure mode; fourthly, injecting multidisciplinary failure mechanism and mode, thus injecting failure mechanism and modes into a hydraulic system and the dynamics mechanism; and fifthly, carrying out simulation analysis, analyzing single failure influence, finding out weak links and key parameters of a system, and depicting the degradation paths and performance degradation paths of the key parameters, thus obtaining reliable related data. According to the method, the multidisciplinary failure mechanism and mode injection is realized for the first time, and the long-periodic and reliable modeling method is perfected.

Description

technical field [0001] The present invention provides a multidisciplinary reliability modeling method of hydraulic servo mechanism based on failure mechanism, which is a hydraulic system under joint simulation of multidisciplinary system engineering design modeling simulation software (ie AMESim) and dynamics simulation software (ie ADAMS). The multi-disciplinary long-period reliability modeling method of servo mechanism realizes the simultaneous injection of fault mechanism and mode in the hydraulic system and actuator. It belongs to the field of reliability simulation analysis and is a simulation method that is more in line with engineering reality and focuses on describing common faults. The parameter degradation trajectory of the performance model of the hydraulic servo mechanism caused by the mode and failure mechanism is analyzed to obtain the influence of the simultaneous degradation of the key parameters of the hydraulic system and the actuator on the overall performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 车海洋曾声奎郭健彬王尧阳纯波宋岳恒
Owner BEIHANG UNIV
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