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随着生产技术的发展,动态力测量日趋重要。在实测过程中,由于力传感器的插入,改变了被测系统的动态特性,必然引入不同的测量误差,本文从隔振系统传递力测量的观点入手,用四点参数技术,系统地推证了稳态正弦激励下动态力精确测量的条件。指出,只有当力传感器的刚度很大,满足激振设备—力传感器系统的固有频率ω_s比激振频率ω大5倍以上(ω/ω>5)时,力传感器的读数才能正确的反映所测的动态力;且这个比值随被测系统支承结构的刚度降低而有所提高。
With the development of production technology, dynamic force measurement is becoming more and more important. In the process of actual measurement, due to the insertion of the force sensor, the dynamic characteristics of the system under test are changed, which inevitably introduce different measurement errors. This paper starts with the point of view of measuring the transmission force of the vibration isolation system. With the four-point parameter technology, The condition of precise measurement of dynamic force under steady sinusoidal excitation. It is pointed out that the reading of the force sensor can only be reflected correctly if the stiffness of the force sensor is large enough to satisfy the natural frequency ω_s of the excitation device-force sensor system more than 5 times greater than the excitation frequency ω (ω / ω> 5) Measured dynamic force; and this ratio with the measured stiffness of the system to support the structure has been reduced.