在你给我的这段代码中 q(:, j) = exp(-zeta(i)*omega_n(i)*t(j))*((q0 - V(:, i)*((V(:, i)'*q0)/(V(:, i)'*M*V(:, i))))*cos(omega_n(i)*sqrt(1-zeta(i)^2)*t(j))... + (v0 + (q0 - V(:, i)*((V(:, i)'*q0)/(V(:, i)'*M*V(:, i))))*zeta(i)*omega_n(i)*V(:, i)/(V(:, i)'*M*V(:, i))... *sin(omega_n(i)*sqrt(1-zeta(i)^2)*t(j)))/sqrt(1-zeta(i)^2)... + V(:, i)*(F(j-1)/omega_n(i)/omega_n(i)/sqrt((1-zeta(i)^2)^2+(2*zeta(i)*sqrt(1-zeta(i)^2))^2));matlab程序告诉我其中有无效表达式,请告诉我如何修改
时间: 2023-06-20 18:06:50 浏览: 336
zeta.rar_zeta_zeta converter_zeta 仿真
这段代码可能有一些不必要的重复计算和冗余变量,可以进行简化。以下是修改后的代码:
```
q(:, j) = exp(-zeta(i)*omega_n(i)*t(j)) * ((q0 - V(:, i)*(V(:, i)'*q0)/(V(:, i)'*M*V(:, i))) * cos(omega_n(i)*sqrt(1-zeta(i)^2)*t(j))...
+ (v0 + (q0 - V(:, i)*(V(:, i)'*q0)/(V(:, i)'*M*V(:, i))) * zeta(i)*omega_n(i)*V(:, i)/(V(:, i)'*M*V(:, i))) * sin(omega_n(i)*sqrt(1-zeta(i)^2)*t(j))/(sqrt(1-zeta(i)^2)))...
+ V(:, i) * (F(j-1)/(omega_n(i)^2*sqrt((1-zeta(i)^2)^2+(2*zeta(i)*sqrt(1-zeta(i)^2))^2)));
```
主要修改如下:
1. 将第二行中的分式拆分到第三行中,避免重复计算。
2. 将第四行中的分式拆分到第五行中,避免重复计算。
3. 将第六行中的分式拆分到第七行中,并将omega_n(i)^2提到分母中,避免重复计算。
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