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相关概念视频

Sampling Continuous Time Signal01:11

Sampling Continuous Time Signal

227
In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
227
Sampling Plans01:23

Sampling Plans

180
Sampling is a crucial step in analytical chemistry, allowing researchers to collect representative data from a large population. Common sampling methods include random, judgmental, systematic, stratified, and cluster sampling.
Random sampling is a method where each member of the population has an equal chance of being selected for the sample. It involves selecting individuals randomly, often using random number generators or lottery-type methods. For example, when analyzing the properties of a...
180
Sampling Methods: Overview01:06

Sampling Methods: Overview

309
A sample refers to a smaller subset representative of a larger population. In analytical chemistry, studying or analyzing an entire population is often impractical or impossible. Therefore, samples are used to draw inferences and generalize the whole population. The sampling method selects individuals or items from a population to create a sample. Standard sampling methods include random, judgemental, systematic, stratified, and cluster sampling. 
In analytical chemistry, the choice of...
309
Control Systems: Applications01:25

Control Systems: Applications

600
Electrical engineering plays a pivotal role in our daily lives, with control systems at the heart of many applications, from home appliances to sophisticated space shuttles. Control systems manage and regulate the behavior of devices and processes, ensuring they function safely, correctly, and efficiently.
In modern vehicles, control systems manage various functions to enhance performance and safety. The steering wheel and accelerator are primary inputs in a car's control system. The...
600
Time-Domain Interpretation of PD Control01:07

Time-Domain Interpretation of PD Control

94
Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
94
Sampling Methods: Sample Types01:18

Sampling Methods: Sample Types

214
Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
214

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相关实验视频

Updated: Jun 24, 2025

Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface
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在基于QoS的可变采样方法下,针对CPS的动态事件触发控制.

Qing Geng1, Jinling Li1, Li Li1

  • 1School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China.

ISA transactions
|May 31, 2024
PubMed
概括
此摘要是机器生成的。

本研究引入了一种新的网络物理系统 (CPS) 控制方法,该方法根据网络质量 (QoS) 调整采样率. 这提高了在具有挑战性的网络条件下通信效率和控制性能.

关键词:
网络物理系统 网络物理系统德尔塔地区的系统运营商.动态事件触发机制 动态事件触发机制交换系统的交换系统变量期采样采样 变量期采样采样

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相关实验视频

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科学领域:

  • 控制系统工程 控制系统工程
  • 网络化系统 网络化系统
  • 网络物理系统 网络物理系统

背景情况:

  • 不理想的网络条件,如延迟和数据包丢失,会显著影响网络物理系统 (CPS) 的性能.
  • 传统的固定期采样方法在动态网络环境中效率低下,导致通信过载或性能下降.

研究的目的:

  • 设计一个服务质量 (QoS) 取决于变量采样的动态事件触发控制方法,用于CPS.
  • 在非理想的网络环境中提高通信效率并保持控制性能.

主要方法:

  • 一个基于无线网络 QoS 的可变周期采样器,使用 delta 运营商离散.
  • 一个动态事件触发机制 (DETM),利用可变周期采样信号.
  • 使用平均停留时间 (ADT) 方法获得足够的稳定性条件.

主要成果:

  • 提出的方法有效地减少事件触发的数据计算,并增加事件触发的间隔.
  • 可变的采样时间明确包含在稳定性条件中.
  • 在网络不确定性下保持控制性能的有效性.

结论:

  • 开发的依赖于QoS的可变采样DETM为CPS在具有挑战性的网络中提供了高效和强大的控制解决方案.
  • 这种方法平衡了控制性能与通信资源利用.
  • 该方法为现实世界网络控制系统提供了可行的策略.