The output of a linear time invariant system is the convolution of the input and the system impulse response.

线性非时变系统之输出为输入与脉冲响应之迴旋积。

Aiming at the linear time invariant system, a characteristic value was proposed and the prediction error of RUL was analyzed under some assumptions for system structure and hidden fault.

针对线性时不变系统构造了预测特征量，并分析了在一定的系统结构假设和故障假设下的剩余有效寿命预测误差。