回旋是导致PD C钻头早期失效的主要原因，介绍了一种基于挠性钻头的构想设计的抗回旋pdc钻头，阐述了其结构和抗回旋原理。
A kind of anti-whirl PDC bit designed based on the idea of flexible bit is introduced in this paper and the structure and working principle of it is expatiated.
研究了最近提出的非线性自抗扰控制器(adrc)在大挠性多体卫星姿态控制中的应用问题。
The recently developed nonlinear active disturbance rejection controller (ADRC) is applied to attitude control of large flexible multi-body satellite with reaction wheels.
研究了最近提出的非线性自抗扰控制器在大挠性多体卫星姿态控制中的应用问题。
The recently developed nonlinear Active Disturbance Rejection Controller (ADRC) was applied to the attitude control of large flexible multi-body satellite with reaction wheels.
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