Traditional decoupling process of six-dimensional acceleration sensor is complex and its calculation efficiency is low.The basic reason is that its internal relative motion depends on the external absolute motion.In view of this

taking four types of parallel six-dimensional acceleration sensors as an example

influence relationship between the two kinds of motions is analyzed.Using the dynamic simulation function of ADAMS software

the input and output results of the sensor under different driving conditions are analyzed.The relationship between the relative error caused by neglecting the relative motion and the amplitude and frequency of the linear acceleration and angular acceleration is revealed.Furthermore

by calculating and comparing the condition number of the Jacobian matrix

the reason for the difference of the relationship of different configurations is explained.The results show that the influence of the amplitude of excitation acceleration on the precision of decoupling calculation is low

and the error caused by this is less than 0.001 %.Whether the motion of mass block relative to the base can be ignored in decoupling algorithm mostly depends on the frequency of excitation acceleration

and the closer the condition number of configuration Jacobian matrix is to 1

the smaller the relative error is.The research results provide a theoretical reference for the optimization of decoupling algorithm of six-dimensional acceleration sensor.