Scratch tester axial force fluctuation suppression method based on piezoelectric driving compensation module

The invention provides a scratch tester axial force fluctuation suppression method based on a piezoelectric driving compensation module. The scratch tester axial force fluctuation suppression method comprises the steps that the piezoelectric driving compensation module is integrated in a z-axis motor loading platform of a scratch tester; installing a high-precision force sensor, and calibrating the high-precision force sensor; in the initial stage of the constant load scratch test, the z-axis motor loading platform is linearly loaded to a preset specified load; when a specified load is reached, a scratch test is started, and at the moment, the piezoelectric driving compensation module dynamically adjusts output through a PID control program according to load data collected in real time; when the specified scratch length is reached, the z-axis motor loading platform starts to execute unloading motion; performance verification is carried out on the improved scratch tester, and it is ensured that the best compen