摘要
由于运动副间隙的存在以及制造误差而导致的精度丧失、冲击、噪声、寿命降低等问题已引起人们的关注,本文利用概率统计概念建立的考虑运动副间隙和杆长误差的“随机杆”机构模型首次应用于分析真空开关复杂机构系统的运动精度问题,研究表明各尺寸参数误差对位移、速度、加速度精度有不同敏感程度,机构输出的位移、速度、加速度对各几何参数的敏感程度不仅与运动位置有关,而且构成机构系统的各构件对输出精度的影响存在较大差异。
The problems about the precision failure, impact, noise and life reduction etc. caused by the revolute clearance and manufacture error attracted wide attentions. The stochastic linkage model that is established utilizing the concept of probability and statistics theory is firstly applied to analyzing the movement precision of the complex linkage system of the vacuum circuit breaker considering revolute clearances and linkage length error. The research indicates that different size parameter errors have different sensitive degrees to the precisions of displacement, velocity and acceleration. The sensitive degree to the precisions of displacement, velocity and acceleration not only relates to the movement position, but also shows great difference about the influence of output precision among the linkages of the system.
出处
《机械科学与技术》
CSCD
北大核心
2005年第4期479-483,共5页
Mechanical Science and Technology for Aerospace Engineering
关键词
随机杆模型
运动精度
敏感程度
Stochastic linkage model
Movement precision
Sensitive degree
