Coupling displacement directly affects the output precision of the micro-positioning platform.Controlling the coupling displacement of the spatial micro-positioning platform can effectively improve the output accuracy of the platform.Use control error compensation to eliminate the coupling displacement of the micro-positioning platform.The driving method of the platform is piezoelectric drive.The output displacement of the micro-positioning platform’s output is calculated based on the Karnofsky’s theorem; the size of the flexible hinge of the micro-positioning platform is optimized using ANSYS software

and the optimized micro-positioning platform is simulated and analyzed.Finally

the theoretical calculation value and the simulation analysis value are compared.Through the research of the micro-positioning platform

it is concluded that the platform has the advantages of high positioning accuracy

low coupling displacement and large stroke

which can be used as a reference for the research of similar micro-positioning platforms.