In order to achieve high⁃precision and pure⁃center rotation motion in micro/nanomanipulation tasks

a monolithic pure⁃center rotation platform was designed using two⁃stage compliant amplification mechanisms and a single piezoelectric actuator.Compared with other platforms

the designed rotation platform exhibited the merits of no actuator redundancy

high natural frequency

large rotation angle

and compact structure.The static and dynamic models were established by combining the pseudo⁃rigid body and finite element methods.Also

the output angle

input stiffness

output stiffness

and natural frequency of the rotation platform were simulated by Ansys software.Finally

an experimental test system was built

and the performance of the platform was tested through several experiments.Also

the feedforward control was used to compensate for the piezoelectric hysteresis.The experimental results show that the rotation angle is 16.8 mrad

the natural frequency is 527.3 Hz

and the resolution is 0.3μrad.Meanwhile

the hysteresis nonlinearity is compensated effectively using feedforward control.Thus

the platform is capable the high precision center rotation operation.