Transforming mechanism of component load direction is designed after analyzing component loads error ' s sources . the analysis and calculation of concomitant error from transforming mechanism have also been done to make sure that weighting system can satisfy requirement for precision 在分析加载误差来源后，设计了载荷方向转换机构，并对转换机构带来的误差进行了计算和分析，证明加载系统能够很好地满足精度需要和技术要求。
Furthermore , it was the first time to make a systemic analysis and study to the motion rule and affected factors of this kind of transformer . with the applications of relative polar method and equal view angle method , the transformer that satisfies the requirement of transmission rate and output motion is synthesized . thus , an original non - frictional stepless speed regulator with a 1 . 5kw input power , a 1500 rotation speed , a constant150output rotation speed and a maximum 300 output rotation speed was achieved 在此基础上利用相对极点法和等视角法按传动比及输出运动的要求对转换器进行了综合，得出了输入功率1 . 5kw ，输入转速1500 ，额定输出转速为150 ，最大输出转速300的新型的非摩擦式无级变速器的基本尺寸参数并应用adams软件对其进行了优化；最后对该非摩擦式无级变速器进行了过约束分析，提出了新型的非摩擦式无级变速器无过约束分析的机构运动副的配置方案。
Based on the generalized variational principle of the modificatory variables and substituent shearing strain field interpolation of the bending theory of the mindilin plate , this paper brings up the nine - node mixed plate bending element and adopts the sap2000 ? a large - scale finite element analysis programs . by the examples , we find the precision of the method is satisfying 在对转换层厚板进行局部有限元分析时，本文提出了基于mindlin中厚板弯曲理论的修正的二类变量广义变分原理和替代剪应变场插值方法的九节点厚薄板通用的板弯曲单元，并采用了sap2000有限元程序。
The analysis results and suggestions have been adopted in the structural design . from above analysis , the thesis gets conclusions as following : ( 1 ) total shearing forces under earthquake action in stories under transfer story increase as position of transition story elevated , which is the negative impact resulted from higher position of transfer story and the regulations of position of transfer story in code is reasonable 本文的分析结果及建议已用于该工程的结构设计中，对于转换层位置及形式对复杂高层建筑结构地震反应的影响问题，主要得出以下一般性结论：地震作用下，转换层下部楼层的层总地震剪力和弯矩随转换层位置的增高有所增大，这是转换层位置较高带来的不利影响，规范对转换层位置进行限制是适当的。
From above analysis , the thesis gets conclusions as following : ( 1 ) the frequencies of multi - tower building are so dense and the coupling in each mode is so evident that the cqc method instead of srss should be used to calculate the seismic action effect ; ( 2 ) torsion effects is distinct between the modes of asymmetry multi - tower structure and it is necessary to take translation - torsion coupling into account ; ( 3 ) the effect of the enlarged base rigid on the seismic properties is very big , the rigid ratio of the enlarged base to towers in asymmetry multi - tower structure should be designed in a proper range ; ( 4 ) the distribution of plane rigid is asymmetry because of the asymmetry layout of towers . the torsion effects of structure not only result in large torsion internal force in vertical element resisting lateral displacement , but also make large influences on the stress of transfer plate and near floors , thus it is necessary to strengthen those floors 通过上述分析，得出以下主要结论：多塔楼结构存在频率密集现象，各振型间耦联效应明显，地震作用计算应采用cqc组合原则而不能简单地采用srss组合原则；非对称多塔结构的振型中，扭转作用明显，平扭耦联效应值得考虑；裙楼刚度对整体结构的抗震性能影响很大，非对称多塔结构宜控制裙楼与塔楼刚度比在适宜的范围；非对称多塔易导致平面刚度分布不均匀，结构扭转效应不仅在竖向抗侧构件中引起较大的扭转内力，对转换层楼板应力有较大的影响，且延续至相邻楼层，对相应楼层均应采取相应的加强措施。
Thirdly , the principle in realization of d / a using on - chip pwm channel in the tms320f2812 - based system is analyzed . some methods of spwm , specially , nonsymmetry regular sampling are studied . avc system based on pwm technology is realized . finally , active vibration control experiment is performed about the first vibration mode of cantilever beam 三、研究了利用pwm通道实现da功能的工作原理,选用精度相对较高的不对称规则采样算法,利用dec2812设计并实现了基于脉宽调制技术的数模转换系统,完成了数据采集, ad转换, pwm波输出的全过程,并对转换结果进行了误差分析。
By using msp430 micro controller unit and cpld technology , this method realized twofold frequency phase ranging : the rough measurement of the distance is realized by countering high frequency pulses which are filled in discriminating phase pulses ; the accurate discriminating phase pulses are converted by using the method of time to voltage conversion , and then the adc device samples the converted voltage , so the accurate measurement of the distance is obtained by processing the adc samples through micro controller unit 该方法通过msp430单片机和先进的cpld技术实现双频测相:粗测通过采用对鉴相脉冲填充高频脉冲的办法来实现;精测则利用时间-电压转换法对鉴相脉冲进行转换,然后由模数转换器adc对转换电压进行采样,通过单片机对adc的输出值进行计算处理获得精测值。
Research shows that the maximum shear and moment or the maximum increment happens in the ground floor due to elevating of position of transition story ; ( 2 ) when transfer story is located at higher position , the in - story displacement between floors near transfer story change severely , but the value is smaller than the value came from the lower position of transfer story ; ( 3 ) it is economical in cost and beneficial for seismic properties of whole structure to reduce the depth of the transfer beam simultaneously ensuring its shear , blending and deformation capacity under vertical load , wind load and seismic action ; ( 4 ) big depth beam and thick transfer plate are advantageous for anti - torsion of structure , but frequently transferring is disadvantageous for anti - torsion of structure and should be limited 但研究表明，最大层地震剪力和弯矩或由转换层位置的提高而引起的最大增值一般仍发生在首层；转换层位于较高位置时，结构楼层的层间位移在转换层附近出现层间位移突变，但其数值较转换层位置较低时的相应楼层的层间位移要小许多；如果适当减小梁高，保证转换梁的抗剪承载力，并同时满足转换梁在竖向荷载和水平地震、风作用下抗弯承载力及挠度等要求，对结构的整体抗震性能是有利的，且可以进一步节约工程造价，不失为一种较好的转换结构形式；加大次梁截面和楼板厚度对转换梁的抗扭有利。
The dissertation mainly has a research on beam shape of concrete transfer floor . the load form of transfer floor is complicated and the stress - strain changes greatly , so the structure design could be divided into the calculations of rectangular sections in bending , incline plane in shearing , and shear wall structure . because transfer floor is an important part in high - rise building , it needs special requests of design and structure 本文以目前广泛使用的梁式钢筋混凝土转换层为研究对象，针对梁式转换层受力复杂，应力应变变化大，重点研究了深梁截面设计法的正截面受弯、斜截面受剪及转换层剪力墙结构的计算，并对转换层结构构造设计进行了分析。
