how can use ode45 for differential equation system with time dependent data

dear friends

i want to solve below diffrential equation that vd ,vq,vf are sampled meaured data in time( each one 60000 sample), i have used dsolve but i couldnit get answer so i want to use ode45 but i don not know how can i do that while my data are diffrent in time.

Diff(id,t)=0.4285*ifd(t) - 522.5*vf(t) - 196.3*id(t) - 1963.0*vd(t) + 20.0*ikd(t) - 3106.0*ikq1(t) - 3106.0*ikq2(t) - 3358.0*iq(t)

Diff(iq,t)=3896.0*id(t) - 2214.0*vq + 3613.0*ifd(t) + 3613.0*ikd(t) + 1.194*ikq1(t) + 29.11*ikq2(t) - 221.4*iq(t)

Diff(ifd,t)=522.5*vd(t) + 2056.0*vf(t) + 52.25*id(t) - 1.686*ifd(t) + 21.29*ikd(t) + 826.6*ikq1(t) + 826.6*ikq2(t) + 893.5*iq(t)

Diff(ikd,t)=1402.0*vd(t) - 1493.0*vf(t) + 140.2*id(t) + 1.224*ifd(t) - 42.86*ikd(t) + 2219.0*ikq1(t) + 2219.0*ikq2(t) + 2398.0*iq(t)

Diff(ikq1,t)=1855.0*vq(t) - 3266.0*id(t) - 3028.0*ifd(t) - 3028.0*ikd(t) - 2.969*ikq1(t) - 23.97*ikq2(t) + 185.5*iq(t)

Diff(ikq2,t) =338.6*vq(t) - 596.0*id(t) - 552.6*ifd(t) - 552.6*ikd(t) + 1.679*ikq1(t) - 7.49*ikq2(t)

please help me to solve my problem.

[Jan]

This looks like a standard ODE. Store [id, iq, ifd, ikd, ikq1, ikq2] in a vector y and integrate it. See the examples in

doc ode45

If the problem is stiff, use a stiff solver.

[Maryam ahmad]

Dear Jan

i really thanks for your reply

yes it is standard ode but my problem is that vd vf vq are table data and in each second have diffrent values.

Answer 1

[Star Strider]

ODE with Time-Dependent Terms