{'fraction_non_alphanumeric': 0.014705882352941176, 'fraction_numerical': 0.0, 'mean_word_length': 5.040322580645161, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Sensor based controlled leg type automatic landing system for aerial vehicles

Hovering is an indispensable function of helicopters for the tasks on uneven terrain. But hovering is dangerous and needs high control technique of the operator and a large amount of fuel. Therefore, we have been proposed Leg Type landing gear system for aerial vehicles that can adapt to uneven terrain as a substitute for hovering. We named this automatic landing system on uneven terrain ALS. In this paper, the developed ALS that consists of ultrasonic distance sensors, micro switches, and leg system is introduced. Experimental results of landing on uneven terrain with hanging cord, flight and landing without cord and measurement of power consumption are shown.