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This paper mainly surveys the field of optimal input design for linear single input/output parameter estimation. Firstly, the Concept of Fisher information matraix is extended to the conditions of stochastic signals, and then a G—optimal criteria belonging to output space is set up. And it is proved that D—optimal criteria and G—optimal criteria are equivalent, thus deducing an algorithm of the optimal stochastic signal. 本文探讨了时不变线性随机SISO系统的参数辨识的最优信号问题。首先将Fisher信息矩阵的概念推广到随机信号的情况,然后建立了一个输出空间的G——最优准则,并且证明该最优准则与参数空间的D——最优准则是等价的,由此导出了一个最优信号算法。 The Principle of aquisition of hook shift and some relevant parameters for drilling is introduced. The methods for measuring hook shift with the photoelectric sensor on the pulley or with the magnetelectric sensor on the drawworks are descrived. The algorithm for real-time computer aquistion of the pulse signal is given. Field test proved that the photoelectric sensor oh the pulley is more accurate in measurement, but is complicated in machining and assembling. The magnetoelectric sensor on the drawworks is... The Principle of aquisition of hook shift and some relevant parameters for drilling is introduced. The methods for measuring hook shift with the photoelectric sensor on the pulley or with the magnetelectric sensor on the drawworks are descrived. The algorithm for real-time computer aquistion of the pulse signal is given. Field test proved that the photoelectric sensor oh the pulley is more accurate in measurement, but is complicated in machining and assembling. The magnetoelectric sensor on the drawworks is easy to install and simple in structure and has a long life. The measurement accuracy can be greatly improved with the use of a special algorighm. 介绍了在钻井过程中大钩位移及其相关的几个钻井参数获取原理,分析了利用滑轮光电式传感器及绞车磁电式传感器测量大钩位移的方法.给出了计算机实时获取大钩位移脉冲信号的算法及程序设计.现场实验证明,滑轮光电式传惑器测量精度高,但安装较复杂,机械加工工艺要求高;磁电式传感器安装方便、结构简单、寿命长,采用一定算法后,可使测量精度大大提高,能够满足工程需要. An "iteration algorithm" of amplitude correction using deformable mirrorwas given in this paper. If we iterated one time using this algorithm, a precision twiceas high as the "small signal algorithm" could be attained. It also solved the problem oftruncation errors induced by limited aperture. 本文提出了一种变形镜用于振幅校正的“迭代算法”,只需一次迭代,就可得到比“小信号算法”高一倍的校正精度,可满足一般的振幅校正要求。这种算法还基本解决了Karr提出的有限孔径引起的截断误差问题。
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