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相关概念视频

State Space to Transfer Function01:21

State Space to Transfer Function

198
The conversion of state-space representation to a transfer function is a fundamental process in system analysis. It provides a method for transitioning from a time-domain description to a frequency-domain representation, which is crucial for simplifying the analysis and design of control systems.
The transformation process begins with the state-space representation, characterized by the state equation and the output equation. These equations are typically represented as:
198
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

55
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
55
State Space Representation01:27

State Space Representation

206
The frequency-domain technique, commonly used in analyzing and designing feedback control systems, is effective for linear, time-invariant systems. However, it falls short when dealing with nonlinear, time-varying, and multiple-input multiple-output systems. The time-domain or state-space approach addresses these limitations by utilizing state variables to construct simultaneous, first-order differential equations, known as state equations, for an nth-order system.
Consider an RLC circuit, a...
206
Transfer Function to State Space01:23

Transfer Function to State Space

249
State-space representation is a powerful tool for simulating physical systems on digital computers, necessitating the conversion of the transfer function into state-space form. Consider an nth-order linear differential equation with constant coefficients, like those encountered in an RLC circuit. The state variables are selected as the output and its n−1 derivatives. Differentiating these variables and substituting them back into the original equation produces the state equations.
In an...
249
SFG Algebra01:16

SFG Algebra

117
In Signal Flow Graph (SFG) algebra, the value a node represents is determined by the sum of all signals entering that node. This summed value is then transmitted through every branch leaving the node, making the SFG a powerful tool for visualizing and analyzing control systems.
Each node in an SFG corresponds to a variable, and the interactions between nodes are represented by branches with associated gains. When multiple branches lead into a node, the value at that node is the sum of the...
117
Signal Flow Graphs01:18

Signal Flow Graphs

217
Signal-flow graphs offer a streamlined and intuitive approach to representing control systems, providing an alternative to traditional block diagrams. These graphs use branches to symbolize systems and nodes to represent signals, effectively illustrating the relationships and interactions within the system.
In a signal-flow graph, branches denote the system's transfer functions, while nodes represent the signals. The direction of signal flow is indicated by arrows, with the corresponding...
217

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相关实验视频

Updated: Jun 29, 2025

Automated Deployment of an Internet Protocol Telephony Service on Unmanned Aerial Vehicles Using Network Functions Virtualization
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基于HAPS的多个空间-空中-地面网络与FSO通信:性能分析.

Deepshikha Singh, R Swaminathan, Anh T Pham

    Applied optics
    |April 3, 2024
    PubMed
    概括

    本研究介绍了基于多个高空平台站 (HAPS) 的太空-空-地面网络,使用自由空间光学 (FSO) 来克服6G流量需求. 与现有的FSO网络相比,拟议的系统表现出卓越的性能.

    科学领域:

    • 无线通信无线通信
    • 光学网络的光学网络
    • 电信工程 电信工程 电信工程

    背景情况:

    • 当前的无线技术面临的局限性与不断升级的数据流量和新的应用.
    • 第六代 (6G) 无线系统需要显著更高的吞吐量.
    • 使用自由空间光学 (FSO) 的太空-空-地面 (SAG) 网络对6G有希望,但容易受到大气损害.

    研究的目的:

    • 提出和分析基于多个高空平台站 (HAPS) 的SAG网络,以加强6G无线通信.
    • 通过使用新的HAPS选择方案,调查FSO链接在大气动荡和指向错误下的性能.

    主要方法:

    • 用关闭形式的表达式来导出停机概率,平均符号错误率 (SER),ergodic容量和停机容量在马拉加分布上的指点错误.
    • 开发关键性能指标的非对称表达式,以简化实际分析.
    • 对拟议的基于HAPS的多个FSO系统进行模拟和数值评估.

    主要成果:

    • 拟议的基于HAPS的多个FSO系统显著优于现有的基于HAPS的单个FSO系统.
    • 闭式和非交叉式表达式为各种条件下的系统性能提供了有价值的见解.
    • 该HAPS选择方案有效地减轻了大气影响,提高了链路可靠性.

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    结论:

    • 多个基于HAPS的SAG网络与FSO为满足6G吞吐量需求提供了可行的解决方案.
    • 开发的分析框架使准确的性能预测和系统优化成为可能.
    • 未来的研究应该集中在实际的部署挑战和先进的HAPS协调策略上.