2.运放有一个电流监视输出,干什么用的?

功放相关问题

In some general shaker qualification type testing, it is common that the current may track reasonably well with the actual force applied to the structure. As a result a current monitor is often provided by the amplifier to make an easily measured force estimate. However, there no substitute for measuring the actual force imparted to the structure during modal testing. Also, the force must be directly measured when using an amplifier set in voltage mode. For modal applications, use of the current output is not considered to be an accurate representation of the force applied to the structure in either mode, particularly higher frequencies where dynamics within the stinger/force transducer setup assembly may cause errors that would be undetected by monitoring the current only.

在某些常规的振动台品质试验中,通常,电流有可能很好地跟随施加施加到结构上的力。因此,运放常常提供一个电流监视,以得到一个简易的所测力的估计。然而,在模态试验过程中,没有什么能够替代测量实际传递到结构上的力。另外,当使用设置为电压模式下的功放时,必须直接测量激振力。对于模态应用,无论在什么模式下,不认为电流输出是施加到结构上的力的准确表示,特别是高频,其中推力杆/力传感器设置组装中的动态力相互作用可能引起误差,仅仅通过监视电路,可能检测不出来。