However, when action force is applied to the controlled object, action force is regarded as the command. Hence, the distinction between reaction force and action force is required
in motion control. In the case of reaction force control, th goal is that the reaction force conforms force command neglecting position response. On the other hand, in the case of action force, it is assumed that the action force is command and the motion response is output. Thus, the goal of action force control is the motion response is determined by the action force and control system neglecting position response