Abstract: Given the high energy utilization efficiency of coaxial drones compared to quadrotors, an inverted pendulum coaxial drone is designed with a focus on its modeling and control. Based on the ...

Cheyenne Urban Forestry's Mark Ellison says hundreds of trees were downed as a result of the record-breaking windstorm on Thursday. Arborists say shallow roots, softened soil from recent moisture, and ...

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Abstract: In this work, a control system for a reaction wheel inverted pendulum (RWIP) was practically implemented using low-cost hardware. A switch control strategy combined two controllers: one for ...

Faced with the quandary of how to get mountain lions out of trees for scientific analysis, researchers dosed them with ketamine, then climbed up to place harnesses on the still-conscious cats. “It’s ...