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

您可以使用时域和频域分析命令计算和可视化 SISO 和 MIMO 系统响应，如波特图、尼柯尔斯图、阶跃响应和冲激响应。您还可以提取系统特性，如上升时间和稳定时间、超调和稳定裕度。要开始绘制响应，请参阅绘制系统响应。有关自定义响应图的详细信息，请参阅绘制自定义。

函数

`impulseplot`	Plot impulse response of dynamic system
`initialplot`	Plot initial condition response of dynamic system
`stepplot`	Plot step response of dynamic system
`lsimplot`	Plot simulated time response of dynamic system to arbitrary inputs

`RespConfig`	Options for step or impulse responses (自 R2023a 起)
`gensig`	Create periodic signals for simulating system response with `lsim`

`bodeplot`	Plot Bode frequency response of dynamic system
`nicholsplot`	Plot Nichols frequency response of dynamic system
`nyquistplot`	Plot Nyquist response of dynamic system
`sigmaplot`	Plot singular values for frequency response of dynamic system
`bodemag`	Magnitude-only Bode plot of frequency response

`bode`	动态系统的波特频率响应
`nyquist`	动态系统的奈奎斯特响应
`nichols`	动态系统的尼柯尔斯响应
`sigma`	动态系统的频率响应的奇异值
`freqresp`	在频率网格上评估系统响应
`evalfr`	计算特定频率下的系统响应
`dcgain`	LTI 系统的低频 (DC) 增益
`bandwidth`	频率响应带宽
`getPeakGain`	Peak gain of dynamic system frequency response
`getGainCrossover`	Crossover frequencies for specified gain
`fnorm`	FRD 模型的逐点峰值增益
`norm`	Norm of linear model
`db2mag`	将分贝 (dB) 转换为幅值
`mag2db`	将幅值转换为分贝 (dB)

`getLoopTransfer`	Open-loop transfer function of control system represented by `genss` model
`getIOTransfer`	Closed-loop transfer function from generalized model of control system
`getSensitivity`	Sensitivity function from generalized model of control system
`getCompSensitivity`	Complementary sensitivity function from generalized model of control system

分析线性时不变 (LTI) 系统的时域响应和频域响应

Specify input signals and initial conditions for simulating linear models with arbitrary input signals and initial conditions

创建绘图	Interactively create linear analysis response plots in the Live Editor (自 R2022b 起)

在 Simulink 中使用线性时不变系统模型对象

Time-Domain Responses

Generate and visualize time-response data such as step response and impulse response.
响应图上的时域特征
在响应图上可视化时域系统特征（如稳定时间、超调量）。
Numeric Values of Time-Domain System Characteristics
Use the stepinfo function to obtain numeric values of step response characteristics such as rise time, settling time, and overshoot.

频域响应

生成并可视化频率响应数据，例如使用波特图和尼柯尔斯图。
- SISO 系统的频率响应
- Frequency Response of a MIMO System
响应图上的频域特征
在图上可视化频域系统特征（如峰值响应）。
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.

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.
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.

Analyze Dynamic 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.
Analyze 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.
Validate Simulation Results for Models with Internal Delays
Validate the accuracy of simulations with internal delays by varying sample time. (自 R2026a 起)