The paper presents a reflexion on the state of the art in robot control architectures and evokes the main challenge for their design: the management of domain expertise. It shows the perspective of the production and the use of a Domain Specific Language dedicated to robots architects, to overcome the limitation of current software engineering techniques. The first step in this aim is to perform a domain analysis to define both terminology and concepts that can be understood by most of robot architects. To this end, we propose, as a first basis, a conceptual model for explaining robot control architecture design applied to two examples.