用于旋转调制捷联惯导系统的旋转控制方法

针对旋转调制式捷联惯导系统的电机连续正反转的控制问题,为了满足平稳旋转和反转瞬间对电机转角位置的高精度要求,提出PID控制与开环控制相结合的电机连续正反转的控制方法,并验证了该方法在保证精度的前提下相比于其它的控制算法更为简单易行。分析了旋转控制的角度误差对导航的影响,介绍了系统结构、算法流程和系统调试方法。仿真和实际结果表明:该方法不仅使电机反转瞬间的角度误差降至30角秒以下,还保证了控制方式转换时的平稳过渡,实现了电机的平稳反转。

Direct observation of the clockwise light-driven rotation of F_0F_(1-)ATP synthase complex

The purified thermophilic bacterium PS3 F1β10×His-tag is inserted into the F0F1-ATP synthases of chromatophores isolated from photosynthetic bacteria Rhodospirillum rubrum. The studies of biochemical properties of the hybrid chromatophores show that they have both protons-driving capability and photophosphorylation. The fluorescent actin filaments, as a marker of its orientation by video-microscopic experiment, are connected via Maleimido-C3-NTA to the reconstituted β10×His-tag of F0F1-ATP synthases.The clockwise rotation of FoFt-ATP synthases driven by light is observed directly when viewed from the Fo side to Ft. This system should be valuable for further studying the coupling property of F0F1-ATP synthase.

论三相异步电动机正反转的三种控制方式

本文阐述了三相异步电动机正反转的按钮互锁、接触器互锁、按钮接触器双重互锁的控制方式,分析了它们的特点和工作原理,比较出了三种控制方式的优点和缺点,从而可以为教学工作和实际生产提供参考与借鉴。