1. 开环转移函数:用来分析稳定度,找出Phase Margin(PM:相位裕度)跟Gain Margin(GM:增益裕度) 2. 闭环转移函数:用来测量控制系统性能,如最大超越量、频宽等时与频域性能指标 3. 系统不稳定的二个必要条件:开环转移函数的相位延迟180度开环转移函数的相位延迟180度时的开环增益为1 4. 参考资料 Control System ...
Chapter 7_6 Phase Margin and Gain Margin
marginphasegainchapter开环幅值 ByHuiWang hwang@iipc.zju.edu CHAPTER7 CHAPTER7 FrequencyResponse FrequencyResponse 2008-1-3 2 PhaseMarginandGainMargin ReviewofNyquist’sStabilityCriterion 由Nyquist稳定判据可知:若已知系统的开环函数G(s)H(s),即可 知开环的不稳定极点数(位于S的右半平面)P R ,在画出...
Do Phase margin and Gain margin depend on the input voltage and output current?(Or, Are Phase margin and Gain margin relation to the input voltage and output current?)-We guess that Phase margin only depend on L, C and ESR.Because our customer would like...
Gainmarginandphasemargin • Closed-loopgainofamplifierswithfeedbackis Af (s)A(s)1A(s)replacings=j2πfgivestheclosedloopgainasafunctionof frequency Af (f )A(f)1A(f)•Foragivenfrequencyf1,ifβA(f1)=-1,thecloseloopgainbecomes infinite.Thiscorrespondstoapoleonthejwaxisats=j2πf1.The trans...
margin. From the graph, the phase margin is 3.8658 ◦ , and the gain margin is 0.56057dB. None of these margins is regarded as acceptable (the rule of thumb is PM = 30 ◦ , GM = 3 dB. To find the required gain K, use the following procedure. 1. Find the frequency at ...
The Bode plot looks good, it has good phase and gain margin are good. 100Hz start is fine. The only concern i have the loop bandwidth. Please use equation to design COUT for the better bandwidth. you can also use webench to help you design the right...
The difference between unity and the value of |βA| at the frequency of -180° shift, called the gain margin, is usually expressed in dB. The difference between the phase angle at the frequency where |βA| =0dB and -180° is termed the phase margin. ...
Stability margin analysisNonlinear system analysisDescribing functionsHarmonic BalanceGain MarginsPhase MarginsIn this paper, new definitions of Phase and Gain stability margins for a class of Nonlinear (NL) systems (a linear plant with a nonlinear control), specifically, in systems with control ...
网络释义 1. 增益和相位裕度 DSP英文翻译 - 豆丁网 ... G Gain 增益Gain and phase margin增益和相位裕度General complex exponentials 一般复指数信号 ... www.docin.com|基于9个网页 2. 幅相裕度 幅值和相位裕度,gain... ... ) Gain margin 幅值裕度 )gain and phase margin幅相裕度) gain and phase...