I need help to graph particle's (3D) and declare x,y,z functions of time describing the particle's path, and calculate position ,velocity and acceleration by matlab and simulink, which commands do ı have to use? thanks

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mehmet baki 2017-6-2

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/342993-i-need-help-to-graph-particle-s-3d-and-declare-x-y-z-functions-of-time-describing-the-particle-s

编辑： mehmet baki 2017-6-2

%position vector r=xi+yj+zk
%velocity vector v
%acceleration vector a
t=0:.5:10;
x=2*cos(t);
y=1.3+2.7*t.^2-.031*t.^3;
z=2.4+.14*t.^3;
figure;
plot(x,y,z,t)

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Answer 1

KSSV 2017-6-2

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https://ww2.mathworks.cn/matlabcentral/answers/342993-i-need-help-to-graph-particle-s-3d-and-declare-x-y-z-functions-of-time-describing-the-particle-s#answer_269332

在 MATLAB Online 中打开

t=0:.5:10;
%%position 
x=2*cos(t);
y=1.3+2.7*t.^2-.031*t.^3;
z=2.4+.14*t.^3;
figure;
hold on
plot3(x,y,z,'r')
%%velocity
dt = unique(diff(t)) ;
dx = diff(x)/dt ;
dy = diff(y)/dt ;
dz = diff(z)/dt ;
plot3(dx,dy,dz,'b') ;
%%acceleration
ddx = diff(dx)/dt ;
ddy = diff(dy)/dt ;
ddz = diff(dz)/dt ;
plot3(ddx,ddy,ddz,'g') ;
legend({'position','velocity','acceleration'})