Research on autonomous ships is being vigorously pursued globally. The International Maritime Organization (IMO) is leading a phased approach to the development of unmanned large ships. In contrast, the development of...
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The paper deals with the issues of ensuring the safety of objects in the intelligent transport environment (ITE). A general scheme and a symbolic description of implementing negative impacts (NI) in the ITE are presen...
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unmanned Aerial Vehicle (UAV) use has experienced a remarkable surge across different applications in the past decade. Ensuring uninterrupted data connectivity to the Command and control (C2) system becomes paramount ...
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ISBN:
(纸本)9798350393101;9798350393095
unmanned Aerial Vehicle (UAV) use has experienced a remarkable surge across different applications in the past decade. Ensuring uninterrupted data connectivity to the Command and control (C2) system becomes paramount for ensuring UAV safety and efficiency as deployment continues to grow;however, communication signals are susceptible to various factors that can disrupt bandwidth availability for C2 systems. Among these phenomena, Doppler shift significantly affects transmitted signals due to the UAV's high speeds. This paper provides the results of a comprehensive investigation to quantify and evaluate the effect of Doppler shift on the available bandwidth for C2 systems. This study uses extensive simulations to analyze bit error rates (BERs) and IQ constellation diagrams of the received signals. The research methodology encompasses a range of parameters, including modulation scheme, code rate, Signal-to-Noise Ratio (SNR), and UAV velocity, enabling a comprehensive understanding of Doppler shift influence on available bandwidth. The results show a correlation between the UAV speed and the IQ constellation as well as the BER wherein BER increases with higher velocities, the utilization of more complex modulation schemes, or a decrease in SNR.
In the last decade, controlsystems for unmanned Aerial Vehicles (UAVs) have been an important topic in research due to their increasing usage in many practical fields, and have been extensively studied by resorting t...
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ISBN:
(纸本)9798350358513;9798350358520
In the last decade, controlsystems for unmanned Aerial Vehicles (UAVs) have been an important topic in research due to their increasing usage in many practical fields, and have been extensively studied by resorting to classical continuoustime nonlinear design. Although this approach can simultaneously incorporate different control requirements in the design, the computed control laws are approximated and applied within digital environments in absence of formal performance guarantees. In this work, we present a methodology for the design of dynamic quantized sampled-data event-based stabilizers for a class of time-varying nonlinear systems at the aims of applying the proposed strategy to the autonomous navigation problem of UAVs. Starting from classical nonlinear design achieving tracking of prescribed trajectories in continuous time (emulation approach), we prove the existence of a suitably fast sampling and of an accurate quantization of the input/output channels ensuring the practical stability of the error dynamics by means of quantized sampled-data event-based controllers. Simulations performed in an non-ideal setting confirm the potential of the approach.
This paper deals with the analysis of paths for unmanned aerial vehicle motion. The review of basic approaches for the generation of paths is represented. The characteristics and features of Dubins paths are given. Th...
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The implementation of a master-slave Autonomous Underwater Vehicle (AUV) system significantly reduces expenses while enhancing task efficiency. Precise underwater navigation and positioning is crucial for the safe nav...
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This paper addresses the intersection of military robotics, secure data transmission, and reliable navigationsystems. The navigation system is tailored for maze traversal, allowing an operator to set start and end po...
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Focusing on the requirements of amphibious operations, this paper mainly analyzes the composition of unmanned force, typical combat missions, command and control relations, etc. in amphibious operations. Combined with...
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Focusing on the requirements of amphibious operations, this paper mainly analyzes the composition of unmanned force, typical combat missions, command and control relations, etc. in amphibious operations. Combined with the analysis of the development trend of unmanned equipment and command and controlsystems, this paper constructs the architecture of intelligent cooperative command and control system of unmanned equipment in amphibious operations, and proposes the system composition and the key technologies to break through, including mission planning, route planning, multi-source information intelligence processing, decision, integrated control of large-scale cross domain, effect evaluation of land-attacking based on image understanding. It can provide reference for the development and standardization of intelligent cooperative command and control system of unmanned equipment.
The traveling direction of surgical robot within complex and tortuous natural lumen of the human body is manually adjusted by doctors, leaving room for improvement in operational efficiency and safety. This paper prop...
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With the rapid development of automated control and mobile communication technologies, unmanned ship technology is a derivative product of robotics. This paper aims to study the key technologies of intelligent and aut...
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