4.7 Article

Study on nonlinear dynamic behavior and stability of aviation pressure servo valve-controlled cylinder system

期刊

NONLINEAR DYNAMICS
卷 108, 期 4, 页码 3077-3103

出版社

SPRINGER
DOI: 10.1007/s11071-022-07366-x

关键词

Large aircraft; Pressure servo valve-controlled cylinder system (PSVCS); Nonlinear self-excited oscillations; Stability; Dynamics

资金

  1. National Key R&D Program of China [2018YFB2000700]
  2. National Natural Science Foundation of China [51905465]

向作者/读者索取更多资源

This paper studies the phenomenon of self-excited oscillation caused by nonlinear factors in a large aircraft wheel brake control system. It explores the nonlinear dynamic behavior of the pressure servo valve-controlled cylinder system (PSVCS) and analyzes the influence of key parameters on the nonlinear self-excitation behavior. The stability of the PSVCS is analyzed in both time and frequency domains, and experimental verification is conducted to validate the theoretical results. The conclusions provide important references for the design of braking system control systems.
In this paper, aiming at the phenomenon of self-excited oscillation caused by nonlinear factors in a large aircraft wheel brake control system, the nonlinear dynamic behavior of the pressure servo valve-controlled cylinder system (PSVCS) is studied, and the influence law of the key parameters on the nonlinear self-excitation behavior is obtained. On this basis, the stability of the PSVCS is analyzed both in time domain and frequency domain, and it is proved in principle that the PSVCS is a stable self-closed-loop control system. Firstly, the nonlinear dynamics model of the PSVCS is established in this paper. Secondly, using the method of phase plane analysis, the nonlinear dynamic behavior of the PSVCS and the influence law of key parameters on the system are studied. Thirdly, the nonlinear system of the PSVCS is transformed into a segmented local linear system, and the stability of the prestage and the power stage is analyzed, respectively. Finally, through a performance test platform, which is used to simulate the load of PSVCS, the theoretical analysis results of this paper are verified experimentally under different working conditions. The final experimental results show that both the nonlinear dynamic model established in this paper and the influence law of the key parameters obtained by the phase plane analysis on the nonlinear self-excited oscillation behavior are correct, and the relevant conclusions can provide a reference for the design of the braking system control system.

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