伯德图是频率响应的一种图形表示方法,常用于分析线性时不变系统(Linear Time-Invariant, LTI)的稳定性和性能。它由两个图组成:幅频特性图(Magnitude Plot)和相频特性图(Phase Plot)。幅频图表示系统增益(通常用分贝表示)与对数频率的关系,而相频图表示系统...
接着,使用plt.semilogx函数绘制幅频特性曲线和相频特性曲线。最后,使用signal.margin函数计算边距,并使用plt.plot函数在图中标注边距。
Generally, the gain margin is directly read from the Bode plot as shown below. This can be done by measuring the vertical distance between the magnitude curve & the x-axis at the frequency wherever the Bode phase plot is 180° which is called the phase crossover frequency. The Gain Margin...
A Bode plot makes it easy to determine the phase and gain margins: Phase and gain margins are important for determining system stability (the more margin, the better) Testing closed loop response with an oscilloscope: Inject a disturbance voltage into the loop ...
英文单词“product”在这里翻译为“乘积”的意思,也就是GBWP表示的是开环增益(open loop gain)与频率的乘积。而且,开环增益从某点开始,是一条以“每10倍频率下降20dB增益”的曲线。 那么,运放开环增益到底什么样?我们画这条曲线,要用到Bode Plot(波特图)。
In addition, engineers can easily see the gain margin and phase margin of the control system. Another use is for gaining insight into behavior of dynamic systems. For example, the plot clearly shows if the system is stable, how fast it will respond to commands, and if there are one or ...
Plot Bode frequency response of dynamic system expand all in pageDescription The bodeplot function plots the Bode magnitude and phase of a dynamic system model and returns a BodePlot chart object. To customize the plot, modify the properties of the chart object using dot notation. For more info...
网上有一篇文章说:gain曲线多次穿越时,若最后一次穿越的margin ok,则ok; 此图可将gain曲线上调或下调,实现仅存在一个截止频率; loop compensation 调节: 可将零点降低,以上调gain曲线;将零点升高以下调gain曲线; 最佳答案 ZWC317441532 查看完整内容 第二个频率点是所谓的环路穿越频率,在电源环路控制中,事实上不能...
The phase shift at unity gain determines if the loop is stable. Like Reply You must log in or register to reply here. Thread starterSimilar threadsForumRepliesDate I couldnt solve this qn can someone help me out Homework Help 10 Jun 11, 2024 LT Spice Bode Plot PCB Layout , EDA & ...
BodeplotistherepresentationofthemagnitudeandphaseofG(j*w)(wherethefrequency vectorwcontainsonlypositivefrequencies).ToseetheBodeplotofatransferfunction,youcan usetheMatlabbodecommand.Forexample, bode(50,[193040]) displaystheBodeplotsforthetransferfunction: 50/(s^3+9s^2+30s+40) GainandPhaseMargin Let...