1、典型系统动态性能和稳定性分析的电路模拟一、实验目的1、 学习和掌握动态性能指标的测试方法。2、 研究典型系统参数对系统动态性能和稳定性的影响。二、实验内容观测二阶系统的阶跃响应,测出其超调量和调节时间,并研究其参数变化对动态性能和稳定性的影响。三、实验步骤1、熟悉实验设备,设计并连接一个积分环节和一个惯性环节组成的二阶闭环系统的模拟电路;2、利用实验设备观测二阶系统模拟电路的阶跃特性,并测出其超调量和调节时间;3、改变该二阶系统模拟电路的参数,观测参数对系统动态性能的影响,并记录不同参数下的系统输出曲线。1.开环传递函数为den=1,2,3,2;roots(den)%开换极点G=tf(3,1,
2、2,3,2);Gm,Pm,Wcg,Wcp=margin(G)nyquist(G)bode(G)grid onden=1,2,3,2;roots(den)%开换极点ans = -0.5000 + 1.3229i -0.5000 - 1.3229i -1.0000 G=tf(3,1,2,3,2);Gm,Pm,Wcg,Wcp=margin(G)Gm = 1.3338Pm = 17.1340Wcg = 1.7323Wcp =1.5599G=tf(6,1,2,3,2);Gm,Pm,Wcg,Wcp=margin(G)Warning: The closed-loop system is unstable.
3、In lti.margin at 89Gm = 0.6669Pm = -16.6613Wcg = 1.7323Wcp = 1.96822.将系统的开环传函改为den=1,2,3,2,0;roots(den)%开换极点ans = 0 -0.5000 + 1.3229i -0.5000 - 1.3229i -1.0000 G=tf(3,1,2,3,2,0);Gm,Pm,Wcg,Wcp=margin(G)Warning: The closed-loop system is unstable. In lti.margin at 89Gm = 0.6667Pm = -43.5555Wcg = 1.000
4、0Wcp = 1.3325将系统的开环传函改为G=tf(6,1,2,3,2,0);Gm,Pm,Wcg,Wcp=margin(G)Warning: The closed-loop system is unstable. In lti.margin at 89Gm = 0.3333Pm = -84.3432Wcg = 1.0000Wcp = 1.66973.den=1,2,3,2,0,0;roots(den)%开换极点ans = 0 0 -0.5000 + 1.3229i -0.5000 - 1.3229i -1.0000 G=tf(3,1,2,3,2,0,0);Gm,Pm,Wcg,Wcp=mar
5、gin(G)Warning: The closed-loop system is unstable. In lti.margin at 89Gm = InfPm = -115.6441Wcg = NaNWcp =G=tf(6,1,2,3,2,0,0);Gm,Pm,Wcg,Wcp=margin(G)Warning: The closed-loop system is unstable. In lti.margin at 89Gm = InfPm = -154.5325Wcg = NaNWcp =1.4900RFFNVUUH希望以上资料对你有所帮助,附励志名言3条:1、有志者自有千计万计,无志者只感千难万难。2、实现自己既定的目标,必须能耐得住寂寞单干。3、世界会向那些有目标和远见的人让路。第 7 页
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