Analysis and Experiment of Combustion Powered Linear Actuator for Hopping
LUAN Yunguang1, WANG Huaming1,2, ZHAO Dongbiao1, WANG Zhen1, ZHANG Ketong1
1. Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. The State Key Laboratory of Fluid Power Transmission and Control, Hangzhou 310027, China
To accurately control a hopping robot with combustion powered linear actuator (CPLA), factors that influence the hopping-driving performance of CPLA are analyzed. Firstly, dynamic model is set up according to the working process of CPLA, and performance parameters are obtained. Nextly, how the mole ratio of oxidizer (nitrous oxide N2O) to fuel (propane C3H8) and injection pressures of the two gas influence the output performance of CPLA are analyzed by experiments. Results show that the influence do exist, when the mole ratio is 9.91, the hopping height of CPLA reaches a maximum, and a 3.17kg hopping mechanism can hop as high as 3.2m. CPLA energy efficiency is 8.4% and hopping efficiency is 7.01%. The CPLA outputs a high average power, and is of a large power-mass ratio during the driving hopping process.
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