| 1. | Closed form solution to workspace of double - octahedron variable geometry truss robotic manipulators
二重八面体变几何桁架机器人工作空间解析 |
| 2. | The results show that appropriate combined variable geometries can improve the engine aerodynamic stability greatly
结果表明，恰当的组合变几何调节可显著的改善发动机的稳定工作范围。 |
| 3. | Building hardware , fittings for windows and door height windows - requirements and test methods - variable geometry stay hinges with or without a friction system
建筑五金窗户和门上窗的装置.要求和试验方法.可变几何形状的固定铰链 |
| 4. | Building hardware , fittings for windows and door height windows - requirements and test methods - part 6 : variable geometry stay hinges with or without a friction system ; german version cen ts 13126 - 6 : 2004
窗和落地窗用建筑五金和配件.要求和试验方法.第6部分 |
| 5. | The equations of workspace boundary surfaces for double - octahedron variable geometry truss pmts are derived based on surface analysis method . the projection and section curve grapha of workspace boundary surfaces for double - octahe
推导出了zrps ztps型及m 3tps型并联机床运动学分析的一阶和二阶影响系数矩阵，得到了其运动学模型。 |
| 6. | These analy ' tical expressions are solved using homotopy cofitinuation algorithjns , all solotions of singularity configuration are obtained . a numerical exarnple of singularity configuration analysis for double - octahedron variable geometry truss pmts is given . ,
以r 3tps型并联机床为对象，提出了一种精度建模方法，该方法将精度建模的问题转化对应的“虚拟机构”的运动分析问题。 |
| 7. | But there are some problems in normal turbocharger , for example , the low speed engine torque is deficiency , the engine ca n ' t works with full capacity when in part load , the transient response remains slow , to improve all the above , the variable geometry turbocharger ( vgt ) comes out to be an effective way
由于常规涡轮增压存在低速转矩不足、部分负荷经济性差和瞬态响应迟缓的问题，而采用可变几何截面涡轮增压是解决这些问题比较有效的方案。本文以vgt60增压器和yn4100qbz柴油机为研究对象，开发了可变几何截面增压器电控系统硬件。 |
| 8. | The projection and section curve graphs of workspace boundary surfaces for 6 - sps type pmts are drawn . results of analysis show that the theoretic workspace of 6 - sps trpe pmts is enveloped by 30 surface patchs . input and output ewtons of displacement analysis for double - octahedron variable geometry miss pmts are established , analytical expressions for determining singuledty configuration are derived
分别推导出了znys ztps型、 ips 3tps型和ipt ztps型并联机床奇异仓形判别的解析表达式，得到了奇异曲面方程，并由边界曲面分析方法得到了lps 3tps型和ipt ztps型并联机床的工作空间，文中给出了以上混联结构并联机床奇异位形与工作空间分析的数值实例。 |
| 9. | To meet the needs for wider surge margin of the turbofan engine , a new model was developed to predict the characteristics of the fan / high pressure compressor and turbine in this thesis . several ways , including , variable inlet guide vanes of the fan , variable guide vanes of the high pressure compressor , the variable inlet area ratio of the mixer and the nozzle areas , were presented to enlarge the surge margin of the turbofan engine . meanwhile , a method of combined variable geometries for optimizing controls of inlet guide vanes of the fan , guide vanes and the first two stators of high pressure compressor , area ratio of mixer and noz zle areas was established
为了满足下一代作战飞机对推进系统的性能和稳定性要求，本文建立了压缩系统特性和涡轮特性的新模型，并分别采用改变涡扇发动机风扇进口导流叶片、压气机导流叶片和前两级静叶片、混合室进口处内、外涵面积比和尾喷管面积，研究了其对发动机性能和稳定性的影响，进而得出了涡扇发动机变几何扩稳的方法，为发动机变几何扩稳研究打下理论基础。 |
| 10. | By adjusting many variable geometry components of the engine , bypass ratio can be changed during large range ( the most 0 . 25 of military fighter ) . the high specific thrust characteristic of turbojet engine and the low specific fuel consumption characteristic of the turbofan engine can be realized during different flight phase by the usage of vce technology
变几何变循环发动机是应用于第四代多用途战斗机的理想动力装置，通过多个部件几何的调节在较大范围内改变涵道比，能够使发动机在不同航段分别实现涡喷发动机的高单位推力性能和涡扇发动机的低油耗性能。 |
