A controller for actuating a micromechanical actuator, including a first signal input which is designed to receive a reference signal, a second signal input which is designed to receive a measuring signal which denotes a recorded response by the micromechanical actuator to a control signal, a first controller element which is designed to filter and/or to attenuate predefined frequency modes and/or predefined frequency components in the received reference signal and to output a filtered and/or attenuated reference signal, a second controller element which is designed to modify the received measuring signal in order to minimize the quality of the first mode of the received measuring signal and to output a modified measuring signal, a third controller element which is designed to minimize the deviation between the filtered and/or attenuated reference signal and the received measuring signal and to output a minimized reference signal, a fourth controller element which is designed to modify the bandwidth of the received measuring signal and to subtract it from the minimized reference signal, which makes up the control signal. Furthermore, a corresponding actuating system, a corresponding micro-mirror system and a corresponding method are described.