The presented work shows the design and evaluation of the NIS 1 kN·m primary torque standard machine. The machine covers the range up to 1000 N·m with a very wide range of torque steps thanking different 4 mass stacks. The machine has a double-side lever arm with half-moon ends to provide calibration in the clockwise and anticlockwise directions. An air bearing was used as a fulcrum to provide a low friction coefficient. FEA was used in the design and optimization process of the lever arm. The relative expanded uncertainty of the machine is 0.03% which is proved by recalibration of two reference torque transducers of 200 N·m and 1000 N·m capacity. All En values are less than unity, which reveals the competence of the developed machine.

提出的工作展示了 NIS 1 kN·m 初级扭矩标准机器的设计和评估。得益于不同的 4 个质量堆栈，该机器涵盖了高达 1000 N·m 的范围，具有非常广泛的扭矩步长。该机器有一个带有半月形末端的双侧杠杆臂，以提供顺时针和逆时针方向的校准。空气轴承被用作支点以提供低摩擦系数。FEA 用于杠杆臂的设计和优化过程。该机器的相对扩展不确定度为0.03%，这通过重新校准两个200 N·m和1000 N·m容量的参考扭矩传感器证明。所有的 En 值都小于一，这表明了开发机器的能力。