Volume 33 Issue 3
Mar.  2018
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Local and global stability of pneumatic valveschatter[J]. Journal of Aerospace Power, 2018, 33(3): 663-670. doi: 10.13224/j.cnki.jasp.2018.03.020
Citation: Local and global stability of pneumatic valveschatter[J]. Journal of Aerospace Power, 2018, 33(3): 663-670. doi: 10.13224/j.cnki.jasp.2018.03.020

Local and global stability of pneumatic valveschatter

doi: 10.13224/j.cnki.jasp.2018.03.020
  • Received Date: 2016-09-26
  • Publish Date: 2018-03-28
  • Based on a modified Coulomb friction force model, the nonlinear stability characteristics of pneumatic valves' chatter were theoretically analyzed, and the regions of instability, local and global stability were developed, which interpreted the inevitability and occasionality of valve chatter at the local stable region. Taking a safety valve as the research object, the AMESim model of the safety valve system was constructed, the local and global stability regions, and the effect of Coulomb friction were obtained. Moreover, validation of the stability analysis was performed by the pneumatic experiment of the safety valve under various friction forces and various disturbance conditions. Results indicated there was a local stability region of small disturbance stability and large disturbance instability, showing that the safety valve was stable at exhaust experiment and unstable at exhaust and vibration experiment from the view of simulation. Moreover, with the increase of the Coulomb friction force, the stability and anti-disturbance ability of the safety valve system were enhanced, and the validation of nonlinear stability analysis was improved by the exhaust and vibration experiment of the safety valve.

     

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