Bifurcation analysis for a novel flight vehicle with pitch-control single moving mass

Author:

Liu Zhitao1ORCID,Li Jianqing2,Gao Changsheng3,Jing Wuxing3

Affiliation:

1. Institute of System Engineering, China Academy of Engineering Physics, Mianyang, People’s Republic of China

2. College of Electrical Engineering, Zhejiang University, Hangzhou, People’s Republic of China

3. Department of Aerospace Engineering, Harbin Institute of Technology, Harbin, People’s Republic of China

Abstract

Moving mass flight vehicle is a strongly nonlinear system under high speed flying conditions. The system attitude dynamics becomes even more complex due to the coupling between the internal moving mass with large mass ratio and the vehicle body. This article investigates the open-loop nonlinear dynamics of a novel flight vehicle with pitch-control single moving mass from the prospective of bifurcation theory and continuation methods. Of particular interest is the influence of moving mass parameters on the number of system equilibrium points, stability of equilibrium curves, bifurcation characteristics, and the longitudinal static stability. Numerical results reveal the bifurcation phenomena existing in the proposed flight vehicle; the generated bifurcation diagrams illustrate that the multiple sets of limit points and Hopf points divide the moving mass parameter space into different regions with different values and types of stability, thus indicating the significant role of the moving mass parameters in the system nonlinear dynamics. Finally, a design strategy for the moving mass parameters is concluded based on the bifurcation analysis results.

Funder

National Natural Science Foundation of China

China Postdoctoral Science Foundation

CAEP Foundation

Publisher

SAGE Publications

Subject

Mechanical Engineering,Aerospace Engineering

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