| 摘要 |
<p>A method for determining dynamic errors in a measuring machine that gives the position (xa, ya, za) of a mobile element of the machine (3) in a working space with respect to a reference system (X, Y, Z), comprising: a calibration step (100), defined in which is at least one input-output model (M1, M2, Mcompl), which describes the dynamic behaviour of at least part of the measuring machine; said input-output model yields, in response to at least one input quantity u (Ix, Iy), a plurality of output quantities y (xa, ya, my, raz, ex, ey), which comprise, among other things, the position error (ex, ey) introduced in the measurement of position by the elastic deformations of parts of the machine (1) that undergo dynamic deformation; a step of definition of an estimator filter (M1) that yields, in response to measured values of input quantities u and, in response to measured values of a subset of the output quantities y, an estimate of the position error (ex, ey); the filter (M1) is obtained by means of an analytical method based upon the input-output model; and a step of continuous real-time reconstruction of the error, in which the measured values of the input quantities u and the measured values of a subset of the output quantities y are applied at input to said estimator filter (M1).</p> |
