On-Cam Operation of Counter-Rotating Type Hydroelectric Unit

The counter-rotating type hydroelectric unit, which is composed of the axial flow type tandem runners and the peculiar generator with double rotational armatures, has been proposed. In the unit, the front and the rear runners counter-drive the inner and the outer armatures of the generator, respectively. Besides, the flow direction at the rear runner outlet must coincide with the direction at the front runner inlet, because the angular momentum change through the rear runner must coincides with that through the front runner. In this paper, the tandem runners work at on-cam conditions in keeping the induced frequency constant, to provide the hydroelectric unit for the power grid system. The output and the hydraulic efficiency are affected by the adjusting angles of the front and the rear blades. Both optimum angles giving the maximum output or efficiency were presented at the various discharge/head circumstances, accompanying with the turbine performances.

环型电梯水平运行及其量化研究

鉴于到目前为止的环型电梯诸多专利技术及研究成果缺乏水平运行研究,而这又是环型电梯设计的关键问题,所以提出了环型电梯转向运行和水平运行结构、运行原理、实施过程、安全措施及其量化表示,指出了环型电梯和分叉环型电梯的关键参数及其工程意义。这对环型电梯转向和水平运行的深入研究和量化,以及进一步试制和应用提供了技术理论基础。

机械臂全方位移动自动控制系统研究

针对目前机械臂全方位移动不能灵活控制导致工作效率低问题,本文提出一种根据精确定位信息机械臂适时移动的控制方案,并基于该方案设计一套自动控制系统。在该控制系统中为了提高对机械臂控制的精度和适时性,采用了DSP控制技术,并且对机械臂定点转变方向和直线运行两种行动方式的控制进行研究。采用超声波精确定位技术确保机械臂自由活动的量度是可控的,进而保证了机械臂工作的效率。