1. A method for estimating components of a force torsor that are applied to a bearing comprising a fixed member, a rotary member and at least one row of rolling bodies arranged between said members in order to allow for their relative rotation, said method comprising: measuring a vector (V m ) of N deformations of at least one zone of the fixed member of said bearing which are induced by said torsor and using a physical model linking a vector (Q) of at most N representative values of components of said torsor to a deformation measurement vector, said method further comprising the steps of: introducing a vector (Q) of representative values into the model in order to calculate a deformation measurement vector (V c ); carrying out a pertinence test (T) with processor between the deformation measurement vector (V c ) which is calculated and said measured vector (V m ); and if the test (T) is negative, establishing at least one new vector (Q) of representative values to be introduced into the model according to the result of said test; or if the test (T) is positive, storing the introduced vector (Q) of values, wherein the estimated components of the force torsor are established according to at least one vector (Q) of stored values, wherein the physical model comprises three modules of modelling (M 11 , M 12 , M 13 ), respectively, the link between the vector (Q) and of the measured zone of the fixed member, the link between the measured zone of the fixed member and the deformations of the fixed member and the transfer function of the measurement sensor, the calculation of the deformation measurement vector (V c ) being carried out by these modules in order to successively determine the contact forces (F c ) between the rolling bodies and the fixed member, the estimation of the deformations (D) of the zone of the fixed member which are induced by said contact forces and the measurements associated with said deformations.