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How do I write part of a equation which is predefined in a variable?

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Saiprasad Gore
Saiprasad Gore 2017-5-12
关闭： MATLAB Answer Bot 2021-8-20
syms t;
vg= int( f*sin(o*t)/m);
xg= int(vg);
Is storing the integrated form of my equation in symbolic form in 'xg'.
Now I want to use the equation stored in 'xg' in another equation, say-
eqn1= -1/(Mw*Phi)*(Md*g-Psi*Md/Mw*tan(theta)*(x(1)-xg)+Ks*(y_bar+(x(1)-x(3))*tan(theta)))-Psi/Mw*(x(1)-xg);
Further this eqn1 is solved using ode45().
How do I write this 'eqn1' ??
I am getting following error.
Undefined function 'int' for input arguments of type
'double'.
Error in eqns_v3a (line 34)
vg= int(ag); % Ground Velocity
Error in odearguments (line 87)
f0 = feval(ode,t0,y0,args{:}); % ODE15I sets
args{1} to yp0.
Error in ode45 (line 115)
odearguments(FcnHandlesUsed, solver_name, ode,
tspan, y0, options, varargin);
Error in Wedge_damper_v5 (line 28)
[t,x] = ode45(@eqns_v3a,t,x0); % Left Face

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