Abstract
Power technology has long been the main problem that has plagued the realization of ocean exploration by autonomous underwater vehicles (AUVs). This paper introduces a new wave energy conversion device for AUV, which is sealed inside a closed floating body to avoid interaction with the marine environment. The system uses the gyroscopic effect to continuously convert the pitching motion of waves into electrical energy through flywheel rotation, and thus theoretically extend the endurance time of AUVs. In this paper, a mathematical model of the power generation device is established, and the effects caused by different parameters on the system behavior and energy output are analyzed. In order to reduce the cost of experiments, the energy conversion device is installed on an experimental platform that can simulate wave motion to observe its energy generation performance. The experimental results show that the established mathematical model can accurately reflect the real behavior of the power generation device on the platform under different wave conditions, and the energy output error is only 9.91%.
Highlights
Autonomous underwater vehicles (AUV) are a type of unmanned underwater vehicle (UUV) which are irreplaceable in a variety of deep-sea resource surveys
This paper describes a novel wave energy capture system (GWEC) for AUV, which uses the gyroscopic precession principle to convert pitching wave motion into flywheel rotation to drive power take off (PTO) generation
A mathematical model of the gyroscope wave energy converter (GWEC) is developed and the maximum response amplitude achieved for the system at resonance is obtained by ANSYS/AQWA
Summary
Autonomous underwater vehicles (AUV) are a type of unmanned underwater vehicle (UUV) which are irreplaceable in a variety of deep-sea resource surveys. Environmental energy mainly includes solar energy [9], thermal energy [10] and wave energy [11], which has huge energy storage and is widely regarded as the main source of energy for AUVs in the future [12]. Solar energy can directly convert energy into electricity, but its conversion efficiency is only 10–12%, which restricts the development of charging systems [13]. Breakthroughs in wave energy technology have accelerated the development of the industry, and maritime trials have achieved promising results [20]. With the widespread application of gyroscopes on ships for stabilization [29,30], a gyroscope wave energy converter (GWEC) device has become a research hotspot. The ability of the GWEC to transform the energy of regular waves was tested and the validity of the mathematical model was verified
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