exc7eqb.m

高等引用数学的matlab求解的配套程序

   function du=exc7eqb(t,u)
   du=[u(3);
       u(4);
       9.81*sin(u(1))-sin(u(1)-u(2))*u(4)^2;
       9.81*sin(u(2))+sin(u(1)-u(2))*u(3)^2];