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CLC number: TP242

On-line Access: 2017-10-06

Received: 2016-12-09

Revision Accepted: 2017-03-21

Crosschecked: 2017-09-19

Cited: 0

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Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Yun-guang Luan

http://orcid.org/0000-0002-0632-6381

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Journal of Zhejiang University SCIENCE A 2017 Vol.18 No.10 P.831-840

http://doi.org/10.1631/jzus.A1600773


Simulation and experimental evaluation of a combustion-powered actuator for hopping


Author(s):  Yun-guang Luan, Hua-ming Wang, Dong-biao Zhao, Yang Wang, Feng-hong Chen

Affiliation(s):  College of Mechanical and Electronical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; more

Corresponding email(s):   hmwang@nuaa.edu.cn

Key Words:  Thermodynamic model, Combustion-powered actuator, Simulation analysis, Experimental analysis, Output performance


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Yun-guang Luan, Hua-ming Wang, Dong-biao Zhao, Yang Wang, Feng-hong Chen. Simulation and experimental evaluation of a combustion-powered actuator for hopping[J]. Journal of Zhejiang University Science A, 2017, 18(10): 831-840.

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Abstract: 
A combustion-powered actuator has been proposed in our previous work (Wang et al., 2015), and it has shown great power hopping ability. To explore the hopping process and output performance of the actuator, the model of an actuator driving the hopping process is investigated through theoretical analysis and experimental validation. Firstly, the structure of the actuator and hopping process are described briefly, and the dynamic models of the process are constructed. Secondly, the thermodynamic model of the actuator is established by the Wiebe heat release function and the input energy density is computed by Chemkin for when propane and nitrous oxide with different equivalence ratios are injected into the chamber. Thus, the thermodynamic model is obtained by integrating dynamic and thermodynamic equations. After that, a few output performance parameters are identified to assess system performance. Lastly, the experimental rig of the combustion actuator is set up to test the displacement and pressure of the actuator driven hopping process. By solving the thermodynamic equations, the post-combustion pressure, the displacement and the velocity varying with time are computed, and are compared with the test results, indicating that the computational results match the experimental test well. At the end of the stroke, the velocities of the experiment and simulation are 6.5 m/s and 6.99 m/s, respectively. The hopping results are compared with the simulation when different pressures under equivalence ratio of 1 are injected, and the maximum and minimum deviations are 14.45% and 1.83%, respectively.

燃爆弹跳驱动器仿真与试验研究

目的:研究燃爆弹跳驱动器热-动力学模型,分析驱动器的输出性能,并通过试验验证驱动器热-动力学模型的正确性。
创新点:1. 建立了燃爆弹跳驱动器热-动力学模型,得到燃爆弹跳驱动器的相关输出参数随时间的变化规律;2. 通过理论仿真与试验测试分析了驱动器的输出性能。
方法:1. 根据对燃爆弹跳机器人工作过程分析,推导出燃爆弹跳驱动器工作过程中的动力学模型,并对锁紧力与弹簧刚度参数进行测试;2. 根据热-动力学模型推导出燃烧室内压力随时间变化的函数;3. 通过试验测试驱动器驱动弹跳过程中压力和位移随时间的变化曲线,将测试结果与热-动力学模型仿真的结果进行比较。
结论:1. 建立了燃爆弹跳驱动器的热-动力学模型,得到了驱动器的输出性能参数;2. 试验测试结果与仿真计算结果吻合,证明了驱动器热-动力学模型的正确性。

关键词:热-动力学模型;燃爆驱动器;仿真分析;试验分析;输出性能

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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