Autonomous navigation for Mars final approach using X-ray pulsars and Mars network based on RKF

Author(s):  
Haifeng Yang ◽  
Zhihua Wang ◽  
Huimin Fu ◽  
Yongbo Zhang
Author(s):  
Po-Ting Chen ◽  
Jason L. Speyer ◽  
David S. Bayard ◽  
Walid A. Majid

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Hao Liang ◽  
Yafeng Zhan

The detection of the X-ray pulsar signal is important for the autonomous navigation system using X-ray pulsars. In the condition of short observation time and limited number of photons for detection, the noise does not obey the Gaussian distribution. This fact has been little considered extant. In this paper, the model of the X-ray pulsar signal is rebuilt as the nonhomogeneous Poisson distribution and, in the condition of a fixed false alarm rate, a fast detection algorithm based on maximizing the detection probability is proposed. Simulation results show the effectiveness of the proposed detection algorithm.


Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1708
Author(s):  
Rafael Casado ◽  
Aurelio Bermúdez

Conflict detection and resolution is one of the main topics in air traffic management. Traditional approaches to this problem use all the available information to predict future aircraft trajectories. In this work, we propose the use of a neural network to determine whether a particular configuration of aircraft in the final approach phase will break the minimum separation requirements established by aviation rules. To achieve this, the network must be effectively trained with a large enough database, in which configurations are labeled as leading to conflict or not. We detail the way in which this training database has been obtained and the subsequent neural network design and training process. Results show that a simple network can provide a high accuracy, and therefore, we consider that it may be the basis of a useful decision support tool for both air traffic controllers and airborne autonomous navigation systems.


2012 ◽  
Vol 36 (1) ◽  
pp. 97-106 ◽  
Author(s):  
Chong-Xia Zhong ◽  
Li Zhang ◽  
Feng Nian ◽  
Jun Yang

2013 ◽  
Vol 51 (5) ◽  
pp. 849-857 ◽  
Author(s):  
Erhu Wei ◽  
Shuanggen Jin ◽  
Qi Zhang ◽  
Jingnan Liu ◽  
Xuechuan Li ◽  
...  
Keyword(s):  

2017 ◽  
Vol 70 (4) ◽  
pp. 719-734 ◽  
Author(s):  
Jiandong Liu ◽  
Erhu Wei ◽  
Shuanggen Jin

The precise autonomous navigation for deep space exploration by combination of multi-source observation data is a key issue for probe control and scientific applications. In this paper, the performance of an integrated Optical Celestial Navigation (OCN) and X-ray Pulsars Autonomous Navigation (XNAV) system is investigated for the orbit of Mars Pathfinder. Firstly, OCN and XNAV single systems are realised by an Unscented Kalman Filter (UKF). Secondly, the integrated system is simulated with a Federated Kalman Filter (FKF), which can do the information fusion of the two subsystems of UKF and inherits the advantages of each subsystem. Thirdly, the performance of our system is evaluated by analysing the relationship between observation errors and navigation accuracy. The results of the simulation experiments show that the biases between the nominal and our calculated orbit are within 5 km in all three axes under complex error conditions. This accuracy is also better than current ground-based techniques.


2016 ◽  
Vol 57 (9) ◽  
pp. 1889-1900 ◽  
Author(s):  
Pingyuan Cui ◽  
Shuo Wang ◽  
Ai Gao ◽  
Zhengshi Yu

2012 ◽  
Vol 29 ◽  
pp. 4369-4373 ◽  
Author(s):  
Jian Du ◽  
Bao-jun Fei ◽  
Ying Liu ◽  
Yu Xiao
Keyword(s):  

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