CAJ | 학술논문

对直升机加装桅杆式瞄准具后, 聚焦式隔振系统的特性进行了分析与试验研究.考虑旋转翼轴、桅杆支撑结构的弹性影响,提出了一个新的5个自由度的桅杆/隔振系统/机身耦合模型.为了验证该模型并有利于桅杆式瞄准技术的进一步研究, 加工了一套瞄准具假件及其支撑结构,并在直-×型机上进行了频率和传递函数测试, 计算结果与试验结果吻合.研究表明, 加装80kg的瞄准具(被隔振重量的12%), 聚焦式隔振系统的一阶频率下降了39%; 结构弹性对隔振系统隔振效率有很大影响, 即使是原型机也达到了403%.
대직승궤가장외간식묘준구후, 취초식격진계통적특성진행료분석여시험연구.고필선전익축、외간지탱결구적탄성영향,제출료일개신적5개자유도적외간/격진계통/궤신우합모형.위료험증해모형병유리우외간식묘준기술적진일보연구, 가공료일투묘준구가건급기지탱결구,병재직-×형궤상진행료빈솔화전체함수측시, 계산결과여시험결과문합.연구표명, 가장80kg적묘준구(피격진중량적12%), 취초식격진계통적일계빈솔하강료39%; 결구탄성대격진계통격진효솔유흔대영향, 즉사시원형궤야체도료403%.
This paper presents a theoretical-cum-experimental study on the dynamic behavior of Focal Isolation System of helicopter equipped with Mast Mounted Sight. A new simplified model of FIS/MMS/ Fuselage with 5-Degree of Freedom (DOF) is proposed, where elasticity of the rotor shaft and the support structure of MMS are taken into account. In order to validate this model and make further investigation on MMS, a dummy MMS and its support are fabricated. Frequency and transfer function experiments are carried out on Z-× helicopter. Good correlation between theoretical and experimental results is achieved. A 39% decrease in 1st longitudinal frequency is noticed for FIS when the mass of MMS is 80kg, which is only 12% of the mass to be isolated. The elasticity of rotor shaft has great influence (403%) on the isolation efficiency of fuselage for prototype.