Abstract
The electrical actuator is usually used in the navigation and control system of the hypersonic aircraft, and it can be described by a multi-body dynamical system, which contains brushless motor, gear pairs, ball screw, folk, rudder, etc. For such a complex multi-body system, it may contain clearance between the mating components, such as the gear pairs, the nut of the ball screw and the folk. Additionally, the discontinuous friction force is introduced due to the friction sheet between the folk and the rudder shaft. Since the working temperature of the electrical actuator for the hypersonic aircraft can be extremely high and time-varying, the stiffness, clearance and friction coefficient will also change during the maneuvering flight of the hypersonic aircraft. In this paper, the ordinary differential equations of each subsystem of the electrical actuation system for the hypersonic aircraft will be developed. The continuous and discontinuous interaction forces between the mating components will be derived. The temperature effects will be considered such that the stiffness, clearance and the friction coefficient of such an actuation system are in the function of the working temperature. The dynamic responses of such an electrical actuation system for different working temperatures will be compared based on the numerical simulations, which shows the evidence that the temperature can reduce the transmission ratio of such a system, as well as affecting the system flutter behavior, through changing the contact position of the adjacent meshing components.
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Funding
This work is partially supported by the 14th 5-years National Defense Pre-Research Foundation of China under Grant No. 50917060301, National Science Foundation of Chongqing under Grant No. cstc2021jcyj-msxmX0089, the Fundamental Research Funds for the Central Universities.
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Xiao, B., Huang, J., Tang, D. et al. Dynamic modeling of the electrical actuation system of the hypersonic aircraft considering the temperature effects. AS (2024). https://doi.org/10.1007/s42401-024-00274-5
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DOI: https://doi.org/10.1007/s42401-024-00274-5