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Results
Investigation of Hybrid Solar-Wind Power Generation Systems For the Polar Expedition Robot
Liang, Jianhong (Robotics Institute, Beihang University, State Key Laboratory of Robotics) | Zhong, Qiliang (Robotics Institute, Beihang University, State Key Laboratory of Robotics) | Wang, Liewu (Robotics Institute, Beihang University, State Key Laboratory of Robotics)
ABSTRACT: In order to develop a self-sufficient autonomous mobile robot which has long working ability and can work on the polar ice caps, important data of the distributed density of the new energy and characteristic of renewable energy within the working area scope of the robot should be seriously considered. In this paper, we design a novel hybrid Solar- Wind power generation system that is capable of data acquisition of the battery charging and data transferring by satellite. This system has the capacity of automatically recording and transferring the information of its battery series, and is installed in Chinese Zhongshan station that is located in the Antarctic. The experimental results show that the Solar & Wind energy could be continuously captured by the system; meanwhile, the possible power consumption of the mobile polar expedition robot is also evaluated and analyzed. The system also provides useful renewable power data for the implementation of future polar expedition robot which aims to have infinite working ability. INTRODUCTION This paper is based on recent studies and takes the special climate in the polar region into consideration. A hybrid Solar-Wind power generation system that is capable of data acquisition of the battery charging and data transferring by satellite is designed. The system ensures that the mobile robot has enough power to take its job, which instead of human in extreme environment in polar latitudes has vital scientific significance for research on polar science and global climate change. The use of solar and wind in polar latitudes is one of keypoint of mobile robot which has the infinite power. Zong Xu (2005) provided the climatic conditions over a year at Zhongshan Station in the South Pole. The analysis of the data shows that the surface is rich in wind energy resources.
Modeling And Analysis of Variable Buoyancy Device Imitating Waterfowl Plumage Structure
Yang, Xingbang (Robotics Institute, BeiHang University, Beijing Ocean Seeker.tec.Co.Ltd) | Liang, Jianhong (Robotics Institute, BeiHang University, Beijing Ocean Seeker.tec.Co.Ltd) | Li, Ying (Robotics Institute, BeiHang University, Beijing Ocean Seeker.tec.Co.Ltd) | Zhang, Hao (Robotics Institute, BeiHang University, Beijing Ocean Seeker.tec.Co.Ltd) | Xiao, Han (Robotics Institute, BeiHang University, Beijing Ocean Seeker.tec.Co.Ltd)
ABSTRACT: Aquatic birds can vary density autonomously in diving by changing the physical condition of the plumage. The variation of plumage determines the whole body's buoyancy when diving. In this paper, plume compression ratio of domestic ducks is quantitatively measured, and a variable buoyancy device that imitates the plumage structure of waterfowl is proposed. The device consists of two components, namely flexible and rigid body part. Three mathematical models of positive buoyancy force varying with diving depth were built for the following three simulation scenarios, flexible body part filled with air only, mixture of air and feathers under airtight and airtightless conditions, respectively. Simulation results suggest that, the scenario when flexible part is filled with mixture of air and feathers under airtight condition results in the best diving performance, free suspended depth could reach a maximum value of 7.4 m, and positive buoyancy force ranges between −43 N and 43.2 N. Simulation results show the effectiveness of bionic variable buoyancy device. INTRODUCTION After tens of thousands of years of evolution, most of waterfowl have acquired excellent diving capabilities. Special biological and morphological structure is necessary to minimize energy consumption in the process of diving. Firstly, the microstructure contributes to the feathers' hydrophobicity, so the plumage is not wetted completely when diving, which keeps the body temperature at a proper level (Rijke, 1968 and 1987; Yuyang Liu etc, 2008; Tuschy and Kierspel, 1998). Secondly, the variation of plumage leads to the variable buoyancy. The compressed air layer in the microstructure of plumage and dissipation of air at specific depth will cause the waterfowl to change their body's density (Ribak, 2005;Gre´millet etc, 2005), which plays a key role in the diving process to minimize energy consumption. Cormorants are common waterfowl living in the air and water, and they have excellent diving skills.
- Research Report > New Finding (0.54)
- Research Report > Experimental Study (0.54)