Patent ID: 7676308

Claim:
A method for operating a steering system of a motor vehicle, comprising: specifying a steering wheel angle (δ S ) utilizing a steering handling device, said steering wheel angle (δ S ) being a measure of a desired steering angle (δ Fm ) for at least one steerable wheel of the motor vehicle; converting a pinion angle (δ G ), which depends on the steering wheel angle (δ S ), into the steering angle (δ Fm ) of the at least one steerable wheel of the motor vehicle; generating an additional angle (δ M ) by operating a control drive; generating the pinion angle (δ G ) by superimposing the additional angle (δ M ) on the steering wheel angle (δ s ) by a superimposing gear mechanism; operating the steering system and triggering the control drive by a control device of the steering system which monitors the dynamics of the control drive by at least one function (ADYN, DYNRES), on the basis of a model; and determining, as a first function, the status (adyn_stat) of the dynamics of the control drive by means of a difference between the variation in the measured additional angle (δ M ) as a function of time, and a nominal, model-based variation in the additional angle of the control drive as a function of time, the difference in the angle, angular velocity and angular acceleration being calculated in each case.