Vibration control of active dry friction damper-dual rotor system based on rotational speed region on-off control
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摘要:
为了满足航空发动机的减振要求，设计了一种电磁型主控式弹支干摩擦阻尼器（active magnetic dry friction damper, AMDFD），通过电磁执行器来实现阻尼器阻尼特性的调节。建立了AMDFD-双转子系统的动力学模型，研究了不同支承位置AMDFD对转子系统振动特性的影响。基于AMDFD-双转子系统的振动特性，设计了一种转速区间开关控制策略，并对策略的有效性进行了仿真分析。在AMDFD -双转子系统试验台上，进行了不同支承位置AMDFD对转子系统振动特性的影响试验以及在加速过多阶临界转速区时转子振动的抑制试验。结果表明：低压风扇轴前轴承及低压涡轮轴后轴承位置的AMDFD对转子振动的抑制最为有效，所设计的控制器能够明显地抑制转子系统在通过多阶临界转速区时的振动，抑制效果最大可达89%。
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关键词:
- 主控式弹支干摩擦阻尼器 /
- 电磁执行器 /
- 双转子系统 /
- 转速区间开关控制 /
- 振动抑制
Abstract:To meet the vibration reduction requirements, an active magnetic dry friction damper (AMDFD) was designed and the friction damping was controlled by active magnetic actuator. The model of the AMDFD-dual rotor system was established, and the effect of the damper with different support positions on the rotor vibration was analyzed. Based on the vibration characteristics of the AMDFD-dual rotor system, a rotational speed region on-off control strategy was designed and its effectiveness was simulated. On the designed test rig, the tests of the dual-rotor system with dampers at each support position under different normal forces were performed. In addition, the vibration suppression tests were carried out when the dual-rotor system accelerated past critical speed. The results showed that AMDFDs near the front/rear bearing of the low-pressure fan/turbine shaft played a dominant role in rotor vibration reduction. The designed controller can substantially suppress the rotor vibration passing the critical speed, up to 89% at maximum.
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图 7 不同支承位置AMDFD对转子各圆盘沿竖直方向响应的影响
Figure 7. Effect of AMDFD with different positions on the vertical response of each disk
图 9 转速区间开关控制下转子沿竖直方向的加速响应仿真结果
Figure 9. Vertical response during the rotor run up under rotational speed region switch control
图 11 不同支承位置AMDFD对转子各圆盘沿竖直方向响应影响的试验结果
Figure 11. Experimental results on the effect of AMDFD with different positions on the vertical response of each disk
图 12 试验中控制前后双转子系统各测点响应幅值
Figure 12. Response amplitude of the twin rotor system at each measurement before and after control in the experiment
表 1 双转子系统的主要参数
Table 1. Main parameters of the twin rotor system
参数 数值 摩擦副 摩擦因数 0.3 切向刚度/107 （N/m） 2 1#支点刚度/106 （N/m） 3.13 2#支点刚度/106 （N/m） 7.16 3#支点刚度/106 （N/m） 5.12 4#支点刚度/106 （N/m） 1700 5#支点刚度/106 （N/m） 4.88 低压风扇 盘质量/kg 13.526 极转动惯量/（kg·m2） 0.1142 赤道动惯量/（kg·m2） 0.2275 低压涡轮 盘质量/kg 21.466 极转动惯量/（kg·m2） 0.1761 赤道动惯量/（kg·m2） 0.3476 高压压气机 盘质量/kg 9.285 极转动惯量/（kg·m2） 0.0764 赤道动惯量/（kg·m2） 0.1508 高压涡轮 盘质量/kg 17.02 极转动惯量/（kg·m2） 0.117 赤道动惯量/（kg·m2） 0.229 
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