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针对四跨八支撑(2 N)和四跨五支撑(N+1)转子轴系通过临界共振区时振动过大的问题,设计了基于模糊比例-积分-微分(PID)主动控制的磁流变阻尼器;搭建2 N及N+1支撑四跨转子实验台,对比分析两种支撑方式的轴系振动特性,并将阻尼器引入轴系中,研究其对转子系统的振动控制效果.结果表明:N+1支撑轴系耦合较2 N支撑轴系强烈,易激起相邻转轴的振动.模糊PID控制程序可根据转子的振幅变化实时为阻尼器提供合适的控制电流,阻尼器可以有效抑制2 N及N+1支撑四跨转子轴系的振动,使轴系振幅控制在目标值范围内.
Aiming at the problem of excessive vibration when the four-span eight support (2 N) and four-span five support (N + 1) rotor shaft passes the critical resonance region, a magnetic flow based on fuzzy proportional-integral- Variable damper was set up to build a four-span rotor test rig with 2 N and N + 1 support. The vibration characteristics of the two support ways were compared and analyzed, and the damper was introduced into the shaft system to study its vibration control effect on the rotor system. The results show that the coupling of N + 1 support shaft is stronger than that of 2 N support shaft, and the vibration of the adjacent shaft can easily be excited. The fuzzy PID control program can provide proper control current for the damper according to the amplitude change of the rotor, and the damper can be effective Suppression of 2 N and N + 1 supports the vibration of the four-span rotor shaft system so that the shaft system amplitude is controlled within the target value range.