navigation n. 1.航行;导航;领航;航海[航空]术。 2.〔集合词〕船。 3.〔古语〕航路;海上交通。 aerial navigation 空中航行。 inland navigation 内河航行。 astro navigation 宇宙航行;天文导航。 blind navigation 仪表导航。 the N- Acts 〔英国〕航海条例。 There has been an increase in navigation through the canal. 通过那条运河的船数增多了。 adj. -al
For the lunar landing phase mission, this paper presents autonomous navigation scheme based on feature points ( fps ) tracking 针对着陆轨道段任务,给出了一种基于特征点跟踪的自主导航方法。
Construct a navigation scheme that is simple and intuitive . provide for pages anticipated . and even for the unexpected as possible 导航系统要简单、直观。既要考虑已预测的页面,也要考虑未预测到的页面。
These are the best formats because surfers are accustomed to them . anything off these norms is liable to confuse . since confused visitors exit quickly, avoid unique or trick navigation schemes 用户已经习惯了这种格式,其它格式可能会迷惑用户,导致用户会退出网站。所以,避免出现独特的导航系统。
In this thesis, the author gives a new navigation scheme for the flight vehicle : flight dynamics navigation method ( fdn ), and studies the principles of loading of digital map in the terrain auxiliary navigation 本文论证了一种具有创新性质的导航方案??飞行力学导航法,并对地形辅助导航中数字地图的加载问题进行了研究。
Secondly, based on the existing international technologic analysis, two different measurement schemes are proposed . one navigation scheme uses pixels as measurements vector, and the other one uses line of sight ( los ) of object celestial body and angles from probe to object body as the measurements vector 其次,通过对国际上现有技术的分析,给出两种不同的导航观测方案:一是利用图像作为观测量的自主导航;二是利用视线方向及夹角作为观测量的自主导航。
In deep space exploration missions, autonomous navigation technology is very important, and in this paper, we do some research into the autonomous navigation schemes of encountering small celestial bodies . it is mainly described as the follows : firstly, by analyzing the orbit characteristics and task requirements in encounter, the simplified orbit dynamic model for the deep space probe is built up, and whether the corresponding model error that meets the demanding of autonomous navigation task is validated 在深空探测任务中,自主导航技术是十分重要的,本文对交会小行星的自主导航方法进行研究,主要内容包括:首先,分析交会小行星的轨道特性及任务需求,建立简化的深空探测器轨道动力学模型,并验证了简化模型的误差能否满足自主导航任务的需求。
Finally, based on the observability analysis and error analysis, two autonomous navigation schemes for encounter phase are respectively proposed in detail . monte carlo simulations are done for the two schemes . by analyzing and comparing the simulation results, we can get the conclusion that, under the accuracy conditions provided by the instruments in existence, the position estimation accuracy for probe encountering object celestial body is 0.42km and 0.04km, which demonstrate the feasibility of the two navigation schemes 最后,在可观性分析和误差分析的基础上,分别给出基于图像测量的自主导航方法和基于视线方向及夹角测量的自主导航方法,并对这两种方法进行蒙特卡罗数值仿真,通过对仿真结果的分析和比较,在现有仪器的测量精度下,探测器在与目标天体交会时刻的位置估计精度分别是0.42km和0.04km,由此表明两种自主导航方案都是可行的。
Finally, based on the observability analysis and error analysis, two autonomous navigation schemes for encounter phase are respectively proposed in detail . monte carlo simulations are done for the two schemes . by analyzing and comparing the simulation results, we can get the conclusion that, under the accuracy conditions provided by the instruments in existence, the position estimation accuracy for probe encountering object celestial body is 0.42km and 0.04km, which demonstrate the feasibility of the two navigation schemes 最后,在可观性分析和误差分析的基础上,分别给出基于图像测量的自主导航方法和基于视线方向及夹角测量的自主导航方法,并对这两种方法进行蒙特卡罗数值仿真,通过对仿真结果的分析和比较,在现有仪器的测量精度下,探测器在与目标天体交会时刻的位置估计精度分别是0.42km和0.04km,由此表明两种自主导航方案都是可行的。