但对于气动高度不稳定的飞机，辨识算法往往因状态方程组和灵敏度方程组积分发散而无法进行。
However, for highly aerodynamic unstable airplane, the identification algorithm can not usually be carried through due to divergence of the state equation and the sensitivity equation integration.
该方法克服了高斯点附近积分值的不稳定问题，提高了计算精度和收敛速度。
The unstability integration number near the Gauss point is overcome, and the calculating precision and the convergence speed are improved.
方程是一病态积分方程其解很不稳定。
This equation is ill-posed and its solutions are extremely unstable.
避免了传统时域积分方程在后期响应求解的不稳定性，提高了瞬态响应求解的效率。
The present method avoids tedious computations in conventional TDIE, the efficiency of solving the transient response is speed up greatly.
众所周知，当一个过程具有共振态、积分电路及不稳定设备传递函数的特点时，同样很难得到较好的闭环步进回应。
Also, it is well known that it is difficult to get good closed-loop step responses for processes with resonances, integrators and unstable plant transfer functions.
众所周知，当一个过程具有共振态、积分电路及不稳定设备传递函数的特点时，同样很难得到较好的闭环步进回应。
Also, it is well known that it is difficult to get good closed-loop step responses for processes with resonances, integrators and unstable plant transfer functions.
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