TWO-DIMENSIONAL LOCATING METHOD OF MOTION PLATFORM BASED ON MAGNETIC STEEL ARRAY

摘要

A two-dimensional locating method of a motion platform based on a magnetic steel array involves the following steps: placing more than four linear Hall sensors (4) at different positions within one or more polar distances of the magnetic steel array (2) on the surface of the motion platform (3) in a motion system; determining a magnetic flux density distribution model according to the magnetic steel array (2); determining the mounting positions of the linear Hall sensors (4), which is converted into the phases with respect to the mass center of the motion platform (3); recording the magnetic flux density measured values of the linear Hall sensors (4) as the motion proceeds; resolving the phase of the mass center of the motion platform (3) in a plane, the measured values being served as observed quantities, and the magnetic flux density distribution model being served as a computation model; determining the position of the mass center of the motion platform (3) with respect to an initial phase according to the phase so as to realize the planar location of the motion platform (3).