CAJ | 학술논문

结合捷联惯性导航技术,系统研究了舵机技术指标对滚转自动驾驶仪性能的影响.根据滚转回路特性,分析了滚转回路截止频率与舵机带宽的基本关系.应用频域分析,在低阶简化模型和高阶模型性能比较的基础上,研究了舵机带宽和相角对滚转回路性能的影响.以二阶系统阶跃响应形式,联系飞行操纵产生的下洗流干扰力矩与滚转稳态指令,确定了舵的最大偏转角速度,保证滚转自动驾驶仪在机动飞行时工作在线性区.另外,综合考虑有转速和角度限制的二阶系统舵机模型及不同总攻角下的最大干扰力矩,考查了饱和非线性区中滚转回路指令和滚转角的响应状态,论证了滚转回路的稳定性.结果表明,对于弹体滚转时间常数为0.3 s,舵效率力矩为42 N·m/rad,带宽要求＞50 rad/s的滚转自动驾驶仪,舵机带宽应不小于20 Hz,阻尼比应在0.6以上.
결합첩련관성도항기술,계통연구료타궤기술지표대곤전자동가사의성능적영향.근거곤전회로특성,분석료곤전회로절지빈솔여타궤대관적기본관계.응용빈역분석,재저계간화모형화고계모형성능비교적기출상,연구료타궤대관화상각대곤전회로성능적영향.이이계계통계약향응형식,련계비행조종산생적하세류간우력구여곤전은태지령,학정료타적최대편전각속도,보증곤전자동가사의재궤동비행시공작재선성구.령외,종합고필유전속화각도한제적이계계통타궤모형급불동총공각하적최대간우력구,고사료포화비선성구중곤전회로지령화곤전각적향응상태,론증료곤전회로적은정성.결과표명,대우탄체곤전시간상수위0.3 s,타효솔력구위42 N·m/rad,대관요구＞50 rad/s적곤전자동가사의,타궤대관응불소우20 Hz,조니비응재0.6이상.
Combined with a strapdown inertial navigation technology, the effect of the technical parameters of a rudder on the performance of a roll autopilot was studied systematically. According to the roll-loop characteristics, the relationship between the roll-loop cut-off frequency and the rudder bandwidth was analyzed; and by comparing the simplified low-order model with the high-order model, the effect of the rudder bandwidth and phase angle on the roll-loop performance was studied based on a frequency domain analysis. In the step response form of a second-order system, the maximum angular velocity of the rudder was determined in combination with the downwash torque with the rolling steady-state command, which ensures the roll autopilot to operate on a linear area under the condition of maneuvering flight. Furthermore, considering the second-order system rudder model with the restrictions on angular velocity and angles and the maximum disturbing torque under different total attack angles, the roll-loop commands and the response state of roll in a saturated nonlinear area was examined,and the stability of roll-loop was proved. Experimental results show that the rudder bandwidth should be no less than 20 Hz and the damping ratio should be 0.6 or more when the missile time constant is 0.3 s, rudder surface moment efficiency is 42 N·m/rad,and the bandwidth of the roll autopilot needs to be more than 50 rad/s.