CAJ | 학술논문

为研究铰链间隙的不确定性对连杆机构输出误差和失效概率的贡献，以舱门机构为例，建立了其多体运动学模型。将机构部件分类为拉压杆和受弯杆，基于“等效杆长理论”，建立了运动精度模型和可靠性模型。分别采用针对输出误差和失效概率的矩独立重要性测度方法，对铰链间隙进行了重要性测度与分析，研究了铰链间隙分布参数的变化对其重要度的影响。计算和分析结果表明，铰链间隙均值的变化对重要度影响较小，标准差的变化对重要度影响较大。减小铰链间隙的标准差，能更为显著地降低其不确定性对机构输出误差和失效概率的贡献。
위연구교련간극적불학정성대련간궤구수출오차화실효개솔적공헌，이창문궤구위례，건립료기다체운동학모형。장궤구부건분류위랍압간화수만간，기우“등효간장이론”，건립료운동정도모형화가고성모형。분별채용침대수출오차화실효개솔적구독립중요성측도방법，대교련간극진행료중요성측도여분석，연구료교련간극분포삼수적변화대기중요도적영향。계산화분석결과표명，교련간극균치적변화대중요도영향교소，표준차적변화대중요도영향교대。감소교련간극적표준차，능경위현저지강저기불학정성대궤구수출오차화실효개솔적공헌。
In order to study the contribution of the joint clearance uncertainty on the output error uncertainty of mechanism,a gear door mechanism of an airplane was taken as example to illustrate the IM of the revolute joint clearance.Firstly,the kinematic model of the mechanism was constructed. Secondly,the components of the mechanism were classified as two-force bars and bending parts. Based on the “equivalent length theory”,the motion accuracy model and reliability model of the gear door mechanism were constructed.At last,with the moment-independent IM method about motion accuracy and failure probability,the IM of joint clearance was emulated under different distribution parameters.From the emulation results one can get that the variance has a bigger affection on the im-portance value of the joint clearance than that of mean value.