CAJ | 학술논문

针对操纵系统的结构非线性问题，提出了2种考虑动刚度特性的舵系统（助力器系统和舵面耦合系统）颤振分析方法。利用分支模态法建立了以助力器系统动力学方程为基础的时域和频域非线性控制方程。使用描述函数法和一种改进的迭代方法得到系统控制命令为0时的预载间隙非线性颤振特性，比较了时域和频域结果。结果显示，在非线性条件下，控制命令的幅值和相位对颤振特性都有影响。
침대조종계통적결구비선성문제，제출료2충고필동강도특성적타계통（조력기계통화타면우합계통）전진분석방법。이용분지모태법건립료이조력기계통동역학방정위기출적시역화빈역비선성공제방정。사용묘술함수법화일충개진적질대방법득도계통공제명령위0시적예재간극비선성전진특성，비교료시역화빈역결과。결과현시，재비선성조건하，공제명령적폭치화상위대전진특성도유영향。
Two new methods which can analyze the rudder′s flutter characteristics are used respectively for structur?ally nonlinear hydraulic booster with its dynamic stiffness considered. The component mode substitution method is used to establish the nonlinear governing equations respectively in time domain and frequency domain based on the fundamental dynamic equations of the hydraulic booster and rocker arm. The flutter characteristics containing preload freeplay nonlinearity are obtained respectively with the existing describing function method and a proposed iterative method when control command is zero. A comparison between the results of time domain and those of fre?quency domain is studied. The results show that the amplitude and phase of the control command have also an influ?ence on the flutter characteristics under the nonlinear condition.