当初始转速恒定时，摩擦系数随刹车压力的增大而减小；
The friction coefficient is decreased with brake pressure increasing for constant initial rev and also decreased with initial rev increasing.
建立了考虑转子转速的新的碰磨力模型，分析了具有初始弯曲和刚度不对称转子系统的碰磨响应，得到了系统参数对系统分叉和混沌响应的影响。
A new model of rub impact force considering varied rotating speed was derived and the rub impact response of a rotor system with initial bending and asymmetric stiffness was analyzed.
本文设计的发电机检测系统由转速驱动和控制单元，数据采集单元，可程控的负载，初始励磁电源以及应用测试软件组成。
The system is composed of rotate drive and control unit, data acquisition unit, program control load, initial excitation source and measure-control program.
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