我未能解决4个方程微分方程。我给代码。两方程相同的代码工作。程序卡是dsolve (ode1, ode2, ode3 ode4)或dsolve(常微分方程)和从来没有完成。

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Sourin戴伊 2017年11月4日

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这个问题直接联系

https://ch.mathworks.com/matlabcentral/answers/365049-i-failed-to-solve-4-equation-differential-equation-i-m-giving-the-code-the-same-code-for-two-equat

回答: 沃尔特·罗伯森 2017年11月4日

答:接受捕鸟者

                         信谊u (t) v (t) x (t) y (t)
                        
                         ode1 = diff (u, t) = = 3 * u + 4 * v + 5 * x + 6 * y;
                        
                         ode2 = diff (v, t) = = 4 * u + 3 * v + 9 * x + 8 * y;
                        
                         t ode3 = diff (x) = = 3 * u + 9 * x + v + 4 * 6 * y;
                        
                         ode4 = diff (y, t) = = 6 * u + 8 * v + 9 * x + 5 * y;
                        
                         常微分方程= [ode1; ode2; ode3 ode4);
                        
                         S = dsolve(常微分方程);
                        
                         uSol (t) = S.u;
                        
                         vSol (t) = S.v;
                        
                         xSol (t) = S.x;
                        
                         ySol (t) = S.y;
                        
                         [uSol (t) vSol (t) xSol (t) ySol (t)) = dsolve(常微分方程)
                        
                         cond1 = u (0) = = 0;
                        
                         cond2 = v (0) = = 0;
                        
                         cond3 = x (0) = = 0;
                        
                         cond4 = y (0) = = 0;
                        
                         气孔导度= [cond1;cond2;cond3;cond4];
                        
                         [uSol (t) vSol (t) xSol (t) ySol (t)) = dsolve(诗赋,气孔导度);
                        
                         ezplot (uSol)
                        
                         持有在
                        
                         ezplot (vSol)
                        
                         持有在
                        
                         ezplot (xSol)
                        
                         持有在
                        
                         ezplot (ySol)
                        
                         网格在;
                        
                         传奇(“uSol”,“vSol”,“xSol”,“ySol”)