动压陀螺马达力矩测量系统的设计
2017-05-18焦智
焦智



摘 要: 以工控机、马达力矩测量平台、数据采集卡为核心,设计了一种新型动压陀螺马达力矩测量系统,能够实时动态地对加速度计(陀螺)动压马达启动时的静摩擦转矩及运转时动摩擦转矩进行精确测量。同时,基于LabVIEW软件平台完成了系统软件设计,实现了动压陀螺马达力矩、转速、电流、电压等数据的实时采集及实时曲线显示。该系统可实现对马达性能的实时监控,完成无人值守的自动化测试。
关键词: 陀螺马达; 力矩测量系统; 数据采集; 实时监控
中图分类号: TN02?34; TM93 文献标识码: A 文章编号: 1004?373X(2017)09?0125?04
Abstract: A new torque measuring system of the dynamic pressure gyro motor was designed by taking the industrial personal computer, motor torque measuring platform and data acquisition card as the cores, which can accurately measure the static friction torque when the dynamic pressure gyro motor is started in real time, and the dynamic friction torque when the dynamic pressure gyro motor is running in real time. The system software was designed on the basis of LabVIEW software platform to realize the real?time acquisition and curve display of the torque, rotate speed, current, voltage and other data of the dynamic pressure gyro motor. The system can monitor the performance of the motor in real time, and accomplish the unattended automatic test.
Keywords: gyro motor; torque measuring system; data acquisition; real?time monitoring
动压陀螺马达是陀螺仪的重要部件,其内部采用独特的悬浮技术,具有精度高、功耗低、寿命长及可靠性高等特点。动压陀螺马达不同于一般的小功率驱动马达,其转子在马达驱动下做高速转动时,小间隙中的气膜产生动压力,使转子同球體脱离机械接触,在自重或加速度过载作用下保持转子在空间稳定。因此,在设计动压陀螺马达时应保证马达通电后能产生足够大的起动力矩,使轴承能迅速克服干摩擦而脱离球体,形成气膜,以免损坏轴承[1?4]。由于动力矩正比于电压值的平方,所以在实际设计中采取的具体措施是将起动电压提高到2~6倍工作电压。因此,力矩的测试对于研究动压陀螺马达性能、保证系统可靠运行极其重要[5?9]。
1 力矩测量原理
采用应变片电测技术的传感器在弹性轴上组成应变桥,只要向应变桥提供电源即可测得该弹性轴受扭的电信号。……
