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How to introduce a constraint and stop condition in ode45 ？
There are two questions. The first question is how to introduce a constraint in ode45 for a variable. For example, the constra...
mehr als 3 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
How to deal with the time response of first order system?
There is a system of differential equations: x'=ax+by, y'=cx+dy, where tau*a'+a=a*. I used to deal with the time response tau...
mehr als 3 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to deal with the connection between symbolic caculations and numerical caculations?
First I need to do symbolic calculations to get the required equations. Then I use the equations for numerical calculations. F...
fast 4 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
How to calculate the norm of the transfer function in frequency domain?
To calculate the norm of the transfer function by substituting s=jω is troublesome, especially for some complicated transfer fun...
fast 4 Jahre vor | 2 Antworten | 1
2
AntwortenFrage
How to calculate the area of the curve around a point?
There is a curve, and the coordinates of each point of the curve is known. Is there a way to calculate the area of the curve aro...
etwa 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to analyze and evaluate a system of differential equations without equilibrium points?
There is a system of differential equations containing more than two variables, and the differentials of the variables cannot al...
etwa 4 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
Can Ode 45 solve piecewise function in the iteration？
In the iterative process of Ode45, the variable values change with time. The relationship between variable values corresponds t...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to store conditional values during iteration by using Ode45?
I want to store data of each iteration, including the conditional values. Is there a way to do this? Thanks! There is an exam...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Can a system of differential equations have a solution when the rate of change of a variable is constant? And how to calculate it?
There is a system of differential equations containing more than two variables, and the rate of change (with time) of one of the...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to solve a complicated equation?
There is a Equation G. How to obtain the values of α and β when G=0？ G=-(-Omega^3*tau + (alpha + beta)*Omega)^2 - (Omega^2 - al...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to plot the phase plane for a system with three degrees by using streamslice?
For a system with 2 degree, we can use steamslice to plot phase plane. e.g： ODEs dx/dt=x^2-2x-xy; dy/dt=y^2-4y+xy; Ma...
mehr als 4 Jahre vor | 0 Antworten | 0
