Results of identification and analysis show that main noise source of the model GZ6921 bus is cooling fan.
识别及分析结果表明，冷却风扇噪声是GZ 6921型客车的主要噪声源。
2
The building of discrete state-space models including system noise provides a basis for the exact identification and effective control.
这种包含系统噪声的离散状态空间模型的建立，为网络化控制系统的准确辨识和有效控制奠定了基础。
3
The influence of noise on identification precision, the effect factor of the computing precision and the reason of missing estimation some modes were analyzed and discussed.