擬合
概述 – 擬合
Fit（擬合）是完成對擬合組的一個特定辨識，從而得到一組候選的模型關系。當創建一個新擬合時，它從父擬合組繼承輸入/輸出和結構定義。
Fits是AIDAPro的核心對象。 其主要用于從工作區中的位號數據估計模型。 除了父擬合組外，擬合由以下定義：
?名稱，描述和注釋；
?用于擬合的數據；
?某些擬合選項，如多處重新采樣，斜坡變量的斜坡標志，預過濾器選項等。
AIDAPro推薦的辨識方法是，首先對數據進行非參數擬合（FIR），從簡化模型中獲得初始參數模型。使用此參數模型作為數據參數模型擬合中的初始估計。 詳情請參見第27頁的“AIDAPro辨識”。

使用擬合
通用
單擊AIDAPro樹中的fit（擬合）打開Fit Summary （擬合概述）窗口。此窗口將顯示以下可編輯字段：Fit名稱，描述及區域筆記。
此窗口還包含了擬合中參數模型的信息，如當對擬合或父擬合組作了一些更改后，其是最新的還是需要重新擬合。

數據
在該窗口指定擬合所需使用的數據。 工作區內的所有數據段都列在此處。選中要用于此處擬合的數據段。如果選中了多個數據段，則擬合中將使用所有段的并集所跨越的時間。
包含在父擬合組標簽的數據段中的所有壞數據段僅對選中的數據段顯示。這些壞的數據段將不在AIDAPr引擎計算中使用。同時你將無法在此表格中編輯這些數據段。可打開壞數據段對話框來編輯壞的數據片。

原文：
Fits
Overview – Fits
A Fit is a particular identification completion of a fit group, resulting in a set of candidate model relationships. When a new fit is created, it inherits from the parent fit group the inputs/outputs and structure definition.
Fits are the core object of AIDAPro. This is where you estimate models from tag data in the workspace. In addition to parent fit groups, fits are defined by:
? Name, description and notes.
? Data to be used in the fit.
? Certain fit options such as resample multiple, ramp flag for ramp variables, prefilter options, etc.
The recommended identification approach in AIDAPro is to first obtain a parametric model from model reduction of a non-parametric fit (FIR) of the data. Use this parametric model as an initial estimate in the parametric model fit of the data. See “AIDAPro Identification” on page 27 for more details.

Using Fits
General
Clicking on a fit in the AIDAPro tree opens the Fit Summary window. This window displays editable fields for the Fit name, a description and area for notes.
This window also contains information about the parametric models contained in the fit, such as if they are up-to-date or need re-fitting because of some changes made to either the fit or the parent fit group.

General Window Fields
**Name ** Fit Name
**Description ** Fit Description
**Notes ** Notes related to the Fit
**FIR fit: **Is the fit FIR model up to date or does it require rebuilding due to a change in model parameter, model order, model structure or data set?
Parametric fit from data: Is the fit parametric model up to date or does it require rebuilding due to a change in model parameter, model order, model structure or data set?

Data
The data used by the fit is specified on this window. All the segments in the workspace are listed here. Select the ones you want to use for this fit. If multiple segments are selected, the time spanned by the union of all the segments is used in the fit.
All the bad slices contained in a segment for the tags in the parent fit group are shown for the selected segments only. These bad slices of data are not used in the AIDAPro engine computations. Note that you cannot edit these segments in this table. Open the Bad Slicing dialog box to edit the bad slice.

2016.10.30