Autonomous driving systems are being vigorously developed worldwide and are expected to exhibit dramatic improvements in capability and widespread adoption in the future. To guarantee their safety and robustness, it is necessary to verify that sensors and systems function normally under diverse natural environments (fog, rain, light, snow, etc.). Anticipating the growing need for such verification, Mitsubishi Heavy Industries Machinery Systems, Ltd. is developing "Adverse Weather Automated-driving Research Environment" as an evaluation system for autonomous mobility. This report describes a control system and method for fog emulation technology, for which achieving and maintaining a uniform environment is highly challenging. Through a simple approach, the system can generate and maintain any visibility from 10 to 200 m with an accuracy of ±10-15%.
