《电力电子电机控制系统仿真技术》洪乃刚第1章

《《电力电子电机控制系统仿真技术》洪乃刚第1章》由会员分享，可在线阅读，更多相关《《电力电子电机控制系统仿真技术》洪乃刚第1章（62页珍藏版）》请在文档大全上搜索。

1、B)表1.8 常用的绘图命令02468101214-500050002468101214-10010图1.18 空间螺旋线-1-0.500.51-1-0.500.510102030-4-2024-2-1012-1-0.500.511.5例例1.4 传递函数2264220122412)(234231ssssssssG例例1.5 传递函数5)5)(2(432)(23232sssssssG)()(1)()(sHsGsGsW闭环传递函数0)()(1sHsG例例1.6 已知方程 求方程的解，即方程的根 G=1 10 16 160; roots(G)ans = -10.0000 -0.0000 + 4.0

2、000i -0.0000 - 4.0000i0160161023sss例例1.6 已知方程 ，例例1.7 已知闭环系统的开环传递函数求系统特征方程的根1601610)7)(20()()(23ssssssHsG-40-30-20-100-20-15-10-5051015200.9880.180.380.540.70.80.890.950.988510152025303540450.180.380.540.70.80.890.95Root LocusReal AxisImaginary Axis-40-30-20-100-20-15-10-5051015200.180.380.540.70.80.

3、890.950.9880.180.380.540.70.80.890.950.98851015202530354045System: G1Gain: 19.7Pole: -11 + 16iDamping: 0.566Overshoot (%): 11.6Frequency (rad/sec): 19.4Root LocusReal AxisImaginary Axis 设系统的开环传递函数为)3)(1)(5)(42 . 0(8)(22ssssssssG-1-0.500.5-1.5-1-0.500.511.50 dB-20 dB-10 dB-6 dB-4 dB-2 dB20 dB10 dB6 d

4、B4 dB2 dBNyquist DiagramReal AxisImaginary Axis-270-225-180-135-90-450-20-10010203040 6 dB 3 dB 1 dB 0.5 dB 0.25 dB 0 dB -1 dB -3 dB -6 dB -12 dB -20 dBNichols ChartOpen-Loop Phase (deg)Open-Loop Gain (dB)s=tf(s);G2=(s+8)/(s*(s2+0.2*s+4)*(s+1)*(s+3); nyquist(G2),grid %画奈奎斯特图 nichols(G2),grid %画尼科尔斯图

5、bode(G2),grid %画伯德图-200-1000100Magnitude (dB)10-210-1100101102-450-360-270-180-90Phase (deg)Bode DiagramFrequency (rad/sec)-200-1000100System: G4Frequency (rad/sec): 0.639Magnitude (dB): -0.354Magnitude (dB)Bode DiagramFrequency (rad/sec)10-210-1100101102-450-360-270-180-90System: G4Frequency (rad/s

6、ec): 0.642Phase (deg): -132Phase (deg)图上某点参数) 1()(TSSKsGBode DiagramFrequency (rad/sec)-100-50050Magnitude (dB)System: G1Frequency (rad/sec): 4.87Magnitude (dB): -0.71110-1100101102103-180-135-90Phase (deg)System: G1Frequency (rad/sec): 4.88Phase (deg): -116Step ResponseTime (sec)Amplitude00.20.40.6