Installing large-sized wind turbines creates numerous challenges and limitations, hindering acceptance of wind generated energy. A structure having a strained substrate formed thereover. The case-shaped container is also provided with first connecting device for electrical and suction connection of the container to the tool and with second connecting device for electrical connection of the container to a power supply. The pole or the zero point of the feedback loop is determined based on the response parameter and the ratio parameter in such a way that the ratio of a response frequency which is quotient of the loop gain divided by an inertia value of the controlled object to a frequency corresponding to the pole or the zero point of the feedback loop is the value determined by the ratio parameter.