一种基于蓄压器非线性特性的Pogo时域仿真方法
By establishing a time-domain simulation method for Pogo based on the nonlinear characteristics of the accumulator, the problem of the inability to accurately predict the vibration stability of Pogo in the existing technology is solved, and accurate time-domain simulation and suppression effect evaluation of Pogo vibration are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI AEROSPACE SYST ENG INST
- Filing Date
- 2023-02-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing Pogo vibration analysis methods mainly focus on the frequency domain, which cannot accurately predict the stability and magnitude of Pogo vibration throughout the entire flight process. Furthermore, existing time-domain simulation results differ significantly from telemetry results when Pogo instability actually occurs, and cannot reproduce asymmetric phenomena.
A Pogo time-domain simulation method based on the nonlinear characteristics of the accumulator is established. By constructing the transformation matrix and correcting the external disturbance terms, a time-domain simulation model considering the nonlinearity of the accumulator is obtained. The Runge-Kutta numerical algorithm is used for simulation to evaluate the suppression effect of Pogo vibration.
It improves the accuracy of time-domain simulation, enabling the prediction of the divergence time, magnitude, and duration of Pogo vibration, evaluating the accumulator's suppression effect on Pogo vibration, and providing more accurate simulation results.
Smart Images
Figure CN116432302B_ABST