METHOD AND DEVICE FOR ACTIVELY CONTROLLING FRICTIONAL FORCE CAUSED BY ELECTRIC FIELD

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for controlling frictional force by which the frictional force between two objects composed of insulators can be arbitrarily and actively controlled and any problem such as wearing on a frictional face or the reduction of an effect with time can be eliminated as well. SOLUTION: Two objects A and B trying to control frictional force are respectively composed of insulators, and an electrostatic field or an electric vibrating field is almost vertically induced to the contact face of the two objects A and B by a sheet metal 2. The electrostatic field or the electric vibrating field is also vertically impressed from the outside to the frictional faces of the insulators to each other in the fine size from milli order to micron order and the frictional force is controlled in non-contact with the frictional face. By changing an electric field strength and an electric field frequency, the arbitrary frictional force can be generated within the range approximately from zero friction (lower than the detection limit of a frictional force measuring instrument at a current time point) to a voltage not to destroy the insulator itself due to the electric field.