第三周作业二

快速地达到并且电流不大于三倍，所以尝试用三倍电流进行计算

model motor1 "An DC Motor Model"

type Voltage=Real(unit="V");

type Current=Real(unit="A");

type Resistance=Real(unit="Ohm");

type Speed=Real(unit="r/min");

type Torque=Real(unit="N.m");

type Inertia=Real(unit="kg.m^2");

Torque Tm"Torque of the Motor";

Speed n"Speed of the Motor";

Current i"Armature Current";

Voltage u"Voltage Source";

Resistance R_ad"External Resistance";

Resistance R1"Start-up Resistance";

Resistance R2"Start-up Resistance";

Resistance R3"Start-up Resistance";

Resistance R4"Start-up Resistance";

parameter Real J = 1"Total Inertia";

parameter Real R = 0.6"Armature Resistance";

parameter Real Kt = 1.8"Torque Constant";

parameter Real Ke = 0.189"EMF Constant";

parameter Real Tl = 29.2"Load Torque";

parameter Real i1=48.6"Maximum Current";

parameter Real i2=17.8"Minimum Current";

equation

Tm-Tl = J * der(n) * 6.28 / 60;

Tm= Kt * i;

u= i * (R+R_ad+R1+R2+R3+R4) + Ke * n;

if time <= 0.1 then

u = 0;

R_ad = 0;

else

u = 240;

R_ad = 0;

end if;

if time <= 1.7 then

R1=2.123;

else

R1=0;

end if;

if time <= 2.55 then

R2=1.194;

else

R2=0;

end if;

if time <= 3.05 then

R3=0.705;

else

R3=0;

end if;

if time <= 3.35 then

R4=0.416;

else

R4=0;

end if;

end motor1;

达到稳定时间为4S左右

第三周作业二

原文：http://www.cnblogs.com/caishixu/p/5281565.html