CAJ | 학술논문

为研究隔离度对制导控制系统稳定性的影响，提出了隔离度传递函数的概念，建立了隔离度传递函数模型和隔离度寄生回路模型。基于此模型，利用频域法分析了隔离度传递函数的特性，利用劳斯判据研究了制导参数对寄生回路稳定域的影响以及制导系统阶数对寄生回路失稳频率的影响。结合某红外图像导引头实例，对隔离度传递函数和寄生回路稳定性进行了深入分析，最后提出了提高隔离度寄生回路稳定性的措施。研究表明：隔离度寄生回路稳定性最严重的区域位于中频段，而提高导引头稳定回路在该段的增益可有效提高导引头隔离度水平，增加寄生回路的稳定性。
위연구격리도대제도공제계통은정성적영향，제출료격리도전체함수적개념，건립료격리도전체함수모형화격리도기생회로모형。기우차모형，이용빈역법분석료격리도전체함수적특성，이용로사판거연구료제도삼수대기생회로은정역적영향이급제도계통계수대기생회로실은빈솔적영향。결합모홍외도상도인두실례，대격리도전체함수화기생회로은정성진행료심입분석，최후제출료제고격리도기생회로은정성적조시。연구표명：격리도기생회로은정성최엄중적구역위우중빈단，이제고도인두은정회로재해단적증익가유효제고도인두격리도수평，증가기생회로적은정성。
In order to analyze effects of disturbance rejection rate on stability of guidance and control systems, a conception of seeker disturbance rejection rate transfer function was presented. Both models of disturbance rejection rate transfer function and parasitical loop of seeker disturbance rejection rate were established. Then the characteristic of disturbance rejection rate transfer function was analyzed using frequency domain methods, and with Routh criteria the effect of guidance parameter on the stability zone of the parasitical loop as well as the influence of guidance dynamics orders on crossover frequency were studied. With an infrared image seeker, the disturbance rejection rate transfer function and stability of parasitical loop were analyzed further. Finally, measures for improving the disturbance rejection rate were presented. The study shows that the parasitical loop may go unstable in the middle frequency region mostly. Improving the gain of the seeker's stability loop in this frequency region is crucial to the disturbance rejection rate level and the stability margins.