The hypocycloid RV reducer is a new type of rotor vector(RV) reducer based on the principle of internal cycloidal planetary transmission. The reducer has a compact and hollow structure. First of all, the component com...The hypocycloid RV reducer is a new type of rotor vector(RV) reducer based on the principle of internal cycloidal planetary transmission. The reducer has a compact and hollow structure. First of all, the component composition, special structure and transmission principle are analyzed. Then, the three-dimension dynamic model for the hypocycloid RV reducer was simulated. Through reasonable assumptions, the dynamic environment was defined, the dynamic model was simplified, and the kinetic equations were listed. The torsional stiffness of the shaft component is calculated, and the meshing rigidity of the cycloidal gear and the needle tooth is calculated. Finally, by using MATLAB software to solve the dynamic equations, combined with the actual parameters of the hypocycloid RV reducer, through the solving equation to obtain the natural frequency of the system, which laid the foundation for the design and research of the following hypocycloid RV reducer.展开更多
文摘通过健康信息传播和教育说服公众形成健康行为意愿是一个现实课题。本文以精细加工可能性模型(elabo‐ration likelihood model,ELM)为理论基础,将说服路径分为中心路径和外围路径,同时引入短期的时间纵向数据追踪。本文实施了10天左右持续使用健康信息的日记报告实验,基于30名大学生提交的377条健康信息日记数据,建立个体层面与信息线索、时间层面的多层线性回归模型(hierarchical linear modeling,HLM),探究健康信息对个体健康行为意愿的说服机制。研究结果表明,健康行为意愿的说服过程主要是信息质量和来源可信度的混合式说服路径;在7天周期内,健康信息说服效果逐渐增强,其中信息质量的说服效果更为稳定,来源可信度的说服效果则随着时间推移逐渐被抵消;健康信息说服路径随个体特征和接触时机而变;健康意识调节来源可信度和信息热度对说服效果的影响,且具有时间效应;卷入度调节信息质量和来源可信度对信息说服效果的影响,但不存在时间效应。本文的研究结果有助于深入理解健康信息对健康行为意愿改变的说服机制,为建立“以人为本”的个性化健康信息传播和健康教育方案提供了参考。
基金supported by the Shenzhen Basic Research Project(JCYJ20150925163026555)
文摘The hypocycloid RV reducer is a new type of rotor vector(RV) reducer based on the principle of internal cycloidal planetary transmission. The reducer has a compact and hollow structure. First of all, the component composition, special structure and transmission principle are analyzed. Then, the three-dimension dynamic model for the hypocycloid RV reducer was simulated. Through reasonable assumptions, the dynamic environment was defined, the dynamic model was simplified, and the kinetic equations were listed. The torsional stiffness of the shaft component is calculated, and the meshing rigidity of the cycloidal gear and the needle tooth is calculated. Finally, by using MATLAB software to solve the dynamic equations, combined with the actual parameters of the hypocycloid RV reducer, through the solving equation to obtain the natural frequency of the system, which laid the foundation for the design and research of the following hypocycloid RV reducer.