| MECHANICAL ENGINEERING |
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Energy consumption of a two-axis solar tracker with redundantly actuated parallel mechanism |
| YU Zhenyang, WU Jun, ZHANG Binbin |
| Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipment and Control, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China |
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Abstract The traditional two-axis solar tracker with serial mechanism has low stiffness and large energy consumption. To overcome these disadvantages, a two-axis solar tracker with redundantly actuated parallel mechanism is proposed and its energy consumption is investigated. Based on the kinematic model of the two-axis solar tracker, the dynamic model is derived by using the principle of virtual work. By taking Beijing as a sample city where the tracker is placed, the trajectory planning of the tracker is investigated. The driving force and energy consumption of the solar tracker and its corresponding nonredudnant counterpart in spring equinox are compared. The proposed solar tracker has high stiffness and low energy consumption.
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| Keywords
solar tracker
parallel mechanism
actuation redundancy
dynamic model
energy consumption
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Issue Date: 09 April 2019
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2019,
Vol. 59
