The problem of complexity reducing of human-machine interactions in the interfaces of complex ergatic and robotic systems is considered. The reason for its appearance is associated with the consciousness mechanism limitations for processing independently existing control processes, the number of which does not exceed five. The ability to manage complex systems is determined by the ability of the interface to match the capabilities of the operator and the complexity of the information and communication model of the management situation. The ways of solving this problem by the methods of classical engineering psychology and ergonomics in aviation on the example of multifunctional indicators and specialized interfaces are shown. The prospects of using the technology of induced virtual environments to control Autonomous mobile robots are analyzed. This technology allows us to separate control algorithms in space and time, which reduces the complexity of mobile robot control and reduces the burden on the cognitive system of the operator. The technology of multimodal virtual environments used in this process makes it possible to increase the efficiency of human-operator interface interactions with a controlled technical system. The article shows the specificity and the solution of the problem of non-classical methods of ergonomics when designing interfaces complex ergotechnical systems and mobile robots for special purposes.