I have a love-hate relationship with grocery stores. On the one hand, I adore discovering newly released products. I stand in the aisle, package in hand, and pretend I’m a contestant on Chopped who must incorporate this unusual, often processed, ingredient into tonight’s dinner. On the other hand, my free time is extremely precious, and the last thing I want to do is spend my day wandering aimlessly up and down endless aisles as I try helplessly to figure out where the store moved the peanut butter. Nowadays, I usually just have the groceries delivered to my house. But I can think of one technological innovation that would have me happily returning to the grocery store. I’m talking, of course, about flying shopping carts.
Researchers at Seoul National University of Science and Technology (SeoulTech) in Korea have developed the Palletrone, an aerial cargo transportation solution, otherwise known as a flying cart. Unlike conventional carts, the Palletrone can easily overcome rocky terrain and obstacles, with human operators pushing and pulling the cart to guide it.
The team recently published their findings in IEEE Robotics and Automation Letters (Volume: 9, Issue: 8, August 2024). In an excerpt from the paper, titled "The Palletrone Cart: Human-Robot Interaction-Based Aerial Cargo Transportation," the team writes: “To facilitate physical human-robot interaction, we employ an admittance control technique. Instead of relying on complex force estimation methods, like in most admittance control implementations, we introduce a simple yet effective estimation technique based on a disturbance observer robust control algorithm. We conducted an analysis of the flight stability and performance in response to changes in system mass resulting from arbitrary cargo loading. Ultimately, we demonstrate that individuals can effectively control the system trajectory by applying appropriate interactive forces and torques.”
To validate the capabilities of their creation, the researchers put the Palletrone through a series of tests. First, the researchers tested to see how modifications to mass and damper parameters would change the drone’s behavior, ensuring that flight characteristics could be changed depending on operator preferences. Second, the researchers moved the Palletrone along an arbitrary path to guarantee that the role and pitch attitude were always kept at zero, ensuring the safe transportation of cargo. Third, the team exposed the Palletrone to a more challenging flight environment to ensure proper operation.
Professor Seung Jae Lee recently spoke with IEEE about the potential uses of the Palletrone. “By attaching a camera to the platform, it could serve as a flying tripod or even act as a dolly, allowing for flexible camera movements and angles. This would be particularly useful in environments where specialized filming equipment is difficult to procure.”
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