Recent researches on innovative drone technologies in robotics field

Drones have achieved great success in research and development and in many industrial fields in the last five years, and there are enormous expectations for their further utilization. It was predicted that the market size of drone technologies will rapidly expand in the near future and is expected to reach $12 billion by 2021. In such circumstances, drones have become one of the main research topics in the robotics field, and the number of studies has increased. However, there is little research in the literature that has classified the many studies related to drones and introduced research trends. This paper aims to properly classify drone studies in the robotics field and to summarize the research trends for each classification.