What are some challenges in developing autonomous flying drones, and how do researchers address issues such as navigation, obstacle avoidance, and energy efficiency in designing aerial robotic systems?

Challenges include sensor integration, flight stability, collision avoidance, and regulatory compliance in airspace navigation. Researchers employ techniques such as computer vision, lidar sensing, and AI-based algorithms for path planning and control to enable autonomous drones to navigate safely and efficiently in complex environments while conserving energy and adhering to airspace regulations.