Balanced truncation method is useful for model reduction. Its advantage is that the reduced order model has a performance guaranteed model reduction by its error upper-bound over the whole frequency range. 平衡截断(BalancedTruncation)是一种有效的模型简化(ModelReduction)方法,它的优点是简化模型有一个误差上限,使简化模型的性能得到保证。