Abstract
In this paper, a method for pneumatic control of aerostatic bearings is examined by numerical simulation. A pneumatic control system using a pneumatic pilot valve, and a nozzle flapper was proposed to realize inexpensive and simple pneumatic control. A numerical model of an aerostatic spindle was developed to investigate the characteristics of the pneumatic control system. The aerostatic spindle was considered as a spring mass damper model, and the stiffness and damping coefficients were calculated using the compressible Reynolds equation and the perturbation method. The calculation results show that the proposed pneumatic control system can increase the machining accuracy of the aerostatic spindle. By setting the gain of the pneumatic control system appropriately in relation to the rotor rotational speed, it was possible to counteract the phenomenon that deteriorated the machining accuracy.
https://ror.org/0112mx960 
