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传统的电阻应变式测力传感器测量动态力时,由于它的等效弹簧刚度、动态质量以及力传递装置的附加质量一起限制了本身的固有频率,因而当被测输入力值的高频分量比较丰富时,就会出现系统的动态质量被激发的情况,从而使整个系统的输出信号不能精确复现输入力值,而产生相当大的动态误差。本文针对国内动态力测试的研究现状,提出了小力值动态测试的惯性力补偿法。方法的实质是:在应变式测力传感器活动端安装一个加速度计,构成一个带补偿环节的新型力传感器。加速度计用来测量载荷瞬变的加速度信号;力传感器用来测量稳态和载荷瞬变时的弹
When the conventional resistance strain gauge load cell measures the dynamic force, its inherent natural frequency is limited due to its equivalent spring rate, dynamic mass and additional mass of the force transmission device. Therefore, when the high frequency component of the measured input force value is compared When rich, there will be the dynamic quality of the system is excited, so that the output signal of the entire system can not accurately reproduce the input force, resulting in considerable dynamic error. In this paper, according to the research status of the dynamic test in China, the inertial force compensation method is proposed. The essence of the method is that an accelerometer is installed on the movable end of the strain gauge load cell to form a new force sensor with a compensation link. Accelerometers are used to measure acceleration signals of load transients; force sensors are used to measure bombs at steady-state and load transients