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提出了一种新的适用于工程的自适应观察器的设计方法。该观察器以可测状态量作为输入，能输出不可测状态量。设计中采用互相关分析确定观察器的阶次，然后以多输入多输出最小二乘法递推出观察器参数。输入基矢量的正确选择，保证了观察器对任意输入的适用；互相关函数分析保证了观察器模型阶次的正确选定；所推导的算法足以保证观察器参数的一致收敛性。以同步电机为例，在微型计算机上进行仿真计算，仿真结果证明了本观察器设计方法的有效性。本观察器可用于同步电机参数自适应辨识中。
A new design method of adaptive observer for engineering is proposed. The observer takes the measurable state quantity as input and outputs the unmeasured state quantity. In the design, the cross-correlation analysis is used to determine the order of the observers, and then the observer parameters are recursed by using the multiple-input and multi-output least squares method. The correct choice of the input base vector ensures that the observer is suitable for any input. The cross-correlation function analysis ensures the correct selection of the observer model order. The derived algorithm is sufficient to ensure the uniform convergence of the observer parameters. Take the synchronous motor as an example, the simulation calculation is carried out on a microcomputer, and the simulation results prove the validity of the observer design method. The observer can be used to identify synchronous motor parameters adaptively.