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相关概念视频

Linear time-invariant Systems01:23

Linear time-invariant Systems

298
A system is linear if it displays the characteristics of homogeneity and additivity, together termed the superposition property. This principle is fundamental in all linear systems. Linear time-invariant (LTI) systems include systems with linear elements and constant parameters.
The input-output behavior of an LTI system can be fully defined by its response to an impulsive excitation at its input. Once this impulse response is known, the system's reaction to any other input can be...
298
Linear Approximation in Time Domain01:21

Linear Approximation in Time Domain

107
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
107
Open and closed-loop control systems01:17

Open and closed-loop control systems

826
Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
826
Transient and Steady-state Response01:24

Transient and Steady-state Response

217
In control systems, test signals are essential for evaluating performance under various conditions. The ramp function is effective for systems undergoing gradual changes, while the step function is suitable for assessing systems facing sudden disturbances. For systems subjected to shock inputs, the impulse function is the most appropriate test signal.
These test signals are integral in designing control systems to exhibit two key performance aspects: transient response and steady-state...
217
Second Order systems II01:18

Second Order systems II

134
In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.
134
First Order Systems01:21

First Order Systems

128
First-order systems, such as RC circuits, are foundational in understanding dynamic systems due to their straightforward input-output relationship. Analyzing their responses to different input functions under zero initial conditions reveals significant insights into system behavior.
When a first-order system is subjected to a unit-step input, its response is characterized by its transfer function. By applying the Laplace transform of the unit-step input to the transfer function, expanding the...
128

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相关实验视频

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Fabrication and Testing of Photonic Thermometers
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优化LERP系统:光热稳定状态模拟分析和实验验证.

Elisavet Chatzizyrli, Angeliki Afentaki, Moritz Hinkelmann

    Optics express
    |June 29, 2023
    PubMed
    概括

    本研究介绍了激光激发远程系统 (LERP) 的模拟策略,将光学和热效应合起来,以模拟的特性. 经验证的模型有助于优化LERP系统的性能和可靠性.

    科学领域:

    • 固态照明 固态照明
    • 对光热分析进行分析.
    • 材料科学是一种材料科学.

    背景情况:

    • 的热稳定性对于可靠的激光激发远程 (LERP) 系统至关重要.
    • 现有的模型往往不考虑温度依赖的属性.

    研究的目的:

    • 开发和验证模拟策略,将LERP系统中的光学和热效应结合起来.
    • 为了提高准确性,将的特性作为温度的函数进行建模.
    • 为了证明模拟框架对LERP系统优化的实用性.

    主要方法:

    • 在Python中开发了一个模拟框架,与Zemax OpticStudio (光学分析) 和ANSYS Mechanical (热分析) 进行接口.
    • 实施了稳定状态光热分析模型.
    • 通过实验验证该模型,使用Ce:YAG单晶与抛光和地面表面在传递和反射设置.

    主要成果:

    • 模拟和实验性峰值温度显示出对抛光和磨砂的良好一致.
    • 光热模型准确地预测了在操作条件下系统的行为.
    • 证明了模拟用于优化LERP系统设计的能力.

    结论:

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    • 结合的光热模拟策略为分析LERP系统提供了经过验证的方法.
    • 对于可靠的LERP系统设计,准确地建模温度依赖的属性至关重要.
    • 这种模拟框架可用于优化LERP系统,以提高性能和寿命.