Basing on the Double star Active Positioning System, this article conducted the research on the Beidou Tri-star Passive Positioning System.
本文在北斗双星有源定位系统的基础上进行了三星无源定位的研究。
"Beidou" double satellite positioning system, adopting two geosynchronous satellites to position, has the characteristic of high precision in positioning and active positioning mechanism.
北斗双星定位系统(简称双星定位)利用两颗地球同步卫星进行定位，具有定位精度高、采用有源定位体制的特点。
The system is easy to be jammed as a result of active positioning mode.
由于其定位过程是有源主动定位，容易受到干扰。
Abstract: at present, China's Beidou geostationary satellites positioning system can only achieve two-dimensional active location, which greatly limits its application.
摘要目前中国的“北斗”双星定位系统只能实现二维有源定位，大大限制了该系统的应用。
At present, China's Beidou geostationary satellites positioning system can only achieve two-dimensional active location, which greatly limits its application.
目前中国的“北斗”双星定位系统只能实现二维有源定位，大大限制了该系统的应用。
A linear active disturbance rejection control (LADRC) strategy is proposed to control the positioning of the pneumatic servo system with strong nonlinear problem.
针对气动伺服系统复杂的非线性问题，提出了一种线性自抗扰控制策略对气动伺服系统进行位置控制。
With Active Smart tilt system so pile picking up is faster and more efficient, more accurate positioning steel sheet pile with a more simple operation, efficiency can be increased by 30%.
采用主动式智能翻转机构，使拾桩更加快捷、高效，钢板桩定位更加准确，操作更加简易，工作效率可以提高30%。
With Active Smart tilt system so pile picking up is faster and more efficient, more accurate positioning steel sheet pile with a more simple operation, efficiency can be increased by 30%.
采用主动式智能翻转机构，使拾桩更加快捷、高效，钢板桩定位更加准确，操作更加简易，工作效率可以提高30%。
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