Based on input-output data, state space models are directly identified by the SMI methods combined with the system theory, linear algebra and statistics.

• 这类方法综合了系统理论，线性代数和统计学三方面的思想，其特点是直接由输入输出数据辨识系统的状态空间模型，因而非常适合多变量系统辨识。