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Design of an Integrated Controller for a Sweeping Mechanism of a Low-Dust Almond Pickup Machine
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Design of an Integrated Controller for a Sweeping Mechanism of a Low-Dust Almond Pickup Machine
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Design of an Integrated Controller for a Sweeping Mechanism of a Low-Dust Almond Pickup Machine
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Journal Article
Design of an Integrated Controller for a Sweeping Mechanism of a Low-Dust Almond Pickup Machine
2023
Overview
California is the world’s biggest producer and exporter of almonds. Currently, the sweeping of almonds during the harvest creates a significant amount of dust, causing air pollution in the neighboring urban areas. A low-dust sweeping system was designed to reduce the dust during the sweeping of almonds in the orchard. The system includes a feedback control system to control the sweeper brushes’ height and their angular velocity by adjusting the forward velocity of the harvester and the brushes’ rotational speeds to avoid any extra overlapping sweeping, which increases dust generation. The governing kinematic equations for sweepers’ angular velocity and vehicle forward speed were derived. The feedback controllers for synchronizing these speeds were designed to optimize brush/dust contact to minimize dust generation. The sweepers’ height controller was also designed to stabilize the gap between the brushes and the orchard floor and track the road trajectory. Controllers were simulated and tuned for a fast response for agricultural applications with less than a second response delay. Results showed that the designed system has acceptable performance and generates low amounts of dust within the acceptable range of California ambient air quality standards.
