Spacecraft pose estimation plays an important role in an increasing number of on-orbit services:rendezvous and docking,formation flights,debris removal,and so on.Current solutions achieve excellent performance at the ...Spacecraft pose estimation plays an important role in an increasing number of on-orbit services:rendezvous and docking,formation flights,debris removal,and so on.Current solutions achieve excellent performance at the cost of a huge number of model parameters and are not applicable in space environments where computational resources are limited.In this paper,we present the Squeeze-and-Excitation based Spacecraft Pose Network(SESPNet).Our primary objective is to make a tradeoff between minimizing model parameters and preserving performance to be more applicable to edge computing in space environments.Our contributions are primarily manifested in three aspects:first,we adapt the lightweight PeleeNet as the backbone network;second,we incorporate the SE attentionmechanism to bolster the network’s feature extraction capabilities;third,we adopt the Smooth L1 loss function for position regression,which significantly enhances the accuracy of position estimation.展开更多
In Trust Zone architecture, the Trusted Application（TA） in the secure world does not certify the identity of Client Applications（CA） in the normal world that request data access, which represents a user data leaka...In Trust Zone architecture, the Trusted Application（TA） in the secure world does not certify the identity of Client Applications（CA） in the normal world that request data access, which represents a user data leakage risk. This paper proposes a private user data protection mechanism in Trust Zone to avoid such risks. We add corresponding modules to both the secure world and the normal world and authenticate the identity of CA to prevent illegal access to private user data. Then we analyze the system security, and perform validity and performance tests.The results show that this method can perform effective identity recognition and control of CA to protect the security of private user data. After adding authentication modules, the data operation time of system increases by about0.16 s, an acceptable price to pay for the improved security.展开更多
基金supported by National Natural Science Foundation of China(Grant Nos.61673262,61603249)National GF Basic Research Program(JCKY2021110B134)the Fundamental Research Funds for the Central Universities.
文摘Spacecraft pose estimation plays an important role in an increasing number of on-orbit services:rendezvous and docking,formation flights,debris removal,and so on.Current solutions achieve excellent performance at the cost of a huge number of model parameters and are not applicable in space environments where computational resources are limited.In this paper,we present the Squeeze-and-Excitation based Spacecraft Pose Network(SESPNet).Our primary objective is to make a tradeoff between minimizing model parameters and preserving performance to be more applicable to edge computing in space environments.Our contributions are primarily manifested in three aspects:first,we adapt the lightweight PeleeNet as the backbone network;second,we incorporate the SE attentionmechanism to bolster the network’s feature extraction capabilities;third,we adopt the Smooth L1 loss function for position regression,which significantly enhances the accuracy of position estimation.
基金supported by the National HighTech Research and Development (863) Program (No. 2015AA016002)the National Key Basic Research Program of China (No. 2014CB340600)+1 种基金the National Natural Science Foundation of China (Nos. 61303024 and 61272452)the Natural Science Foundation of Jiangsu Province (Nos. BK20130372)
文摘In Trust Zone architecture, the Trusted Application（TA） in the secure world does not certify the identity of Client Applications（CA） in the normal world that request data access, which represents a user data leakage risk. This paper proposes a private user data protection mechanism in Trust Zone to avoid such risks. We add corresponding modules to both the secure world and the normal world and authenticate the identity of CA to prevent illegal access to private user data. Then we analyze the system security, and perform validity and performance tests.The results show that this method can perform effective identity recognition and control of CA to protect the security of private user data. After adding authentication modules, the data operation time of system increases by about0.16 s, an acceptable price to pay for the improved security.
