时域和频域分析
系统响应，如波特图和阶跃响应；系统特性，如响应时间和超调；仿真
App
| 线性系统分析器 | 分析线性时不变 (LTI) 系统的时间和频率响应 |
函数
实时编辑器任务
| 创建绘图 | Interactively create linear analysis response plots in the Live Editor (自 R2022b 起) |
模块
| LTI System | 在 Simulink 中使用线性时不变系统模型对象 |
| LPV System | 对线性参数变化 (LPV) 系统进行仿真 |
主题
分析图基础知识
- 绘制系统响应
此示例概述了如何生成时域和频域响应图。
时域分析
- Time-Domain Responses
Generate and visualize time-response data such as step response and impulse response.
- Time-Domain Characteristics on Response Plots
Visualize time-domain system characteristics such as settling time and overshoot on response plots. - Numeric Values of Time-Domain System Characteristics
Use thestepinfofunction to obtain numeric values of step response characteristics such as rise time, settling time, and overshoot. - Response from Initial Conditions
Compute and plot the response of a state-space (ss) model to specified initial state values. - 仿真具有任意输入和初始条件的模型
使用线性仿真工具仿真系统对任意输入信号和初始条件的响应。 - Import LTI Model Objects into Simulink
Use the LTI System block to import linear system model objects into Simulink®. - Use Linearization Offsets to Help Compare Nonlinear and Linearized Responses
Use offsets from linearization to facilitate the comparison of the nonlinear and linearized responses of a Simulink model. (自 R2024a 起)
频域分析
- Frequency-Domain Responses
Generate and visualize frequency-response data such as Bode plots and Nichols plots.
- Frequency-Domain Characteristics on Response Plots
Visualize frequency-domain system characteristics such as peak response on plots. - Numeric Values of Frequency-Domain Characteristics of SISO Model
Obtain numeric values of frequency-domain characteristics such as peak gain, dc gain, and system bandwidth.
线性系统分析器
- Joint Time-Domain and Frequency-Domain Analysis
Compare multiple types of responses side by side, including both time-domain and frequency-domain responses, using the Linear System Analyzer app. - 使用线性系统分析器进行线性分析
使用线性系统分析器分析一个或多个线性模型的时域和频域响应。 - Analyzing MIMO Models
In analysis plots of multiple-input, multiple output LTI models, there are plot tools for selecting subsystems and grouping I/O pairs.
具有时滞的系统
- Analysis of Systems with Time Delays
The time and frequency responses of delay systems can have features that can look odd to those only familiar with delay-free LTI analysis. - Analyzing Control Systems with Delays
Many processes involve dead times, also referred to as transport delays or time lags. Controlling such processes is challenging because delays cause phase shifts that limit the control bandwidth and affect closed-loop stability.
应用
- 分析 RLC 电路的响应
分析二阶系统的时间和频率响应。
