ULTRA-PRECISION POSITION CONTROL DEVICE AND METHOD FOR DETERMINING POSITION AND ATTITUDE INFORMATION ASSOCIATED WITH A 6-DEGREE-OF-FREEDOM STAGE THEREOF

• Main Authors: SON TAE KYU, JANG SANG DON, KIM JA YUL
• Format: Patent
• Language: English
• Published: 22.08.2013
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

A method of determining and controlling position and attitude information associated with a 6-degree-of-freedom stage includes: receiving, from a plurality of sensors associated with the 6-degree-of-freedom stage, displacement information associated with the 6-degree-of-freedom stage. A plurality of equations associated with the plurality of sensors are determined by a control unit based on the displacement information to represent an amount of change in position and attitude associated with each measurement axis of each of the plurality of sensors. The control unit determines position information and attitude information associated with the 6-degree-of-freedom stage using the equations. Movement of the 6-degree-of-freedom stage is caused, at least in part, to be controlled based on the position information, the attitude information, or both the position information and the attitude information. Three coordinate values associated with each valid measurement point of each of the plurality of sensors are associated with at least one degree of freedom.