Improvement and Test for a Force Sensor's Natural Frequency

The reliability of the force data acquired from sensor was highly affected by force sensor's natural frequency.This paper introduced a design scheme of improvement a cantilever beam-sensors' natural frequency and a method to test it by the step response.The step response was produced by the load-line fused by heat.In the design scheme modal analysis and structural static analysis of the force sensor were studied to calculate natural frequencies and strains using ANSYS software.Model updating and simulation were done by simulation results combined with natural frequency formula of cantilever beam time after time.As a result the natural frequency has been raised more than 60 % to 360 Hz.The experiment results are almost identical to the ANSYS results,which confirms the accuracy of ANSYS simulation and the effectiveness of the design scheme.