伝達関数モデル

伝達関数モデルは、多項式の比を使用してシステムの入力と出力間の関係を記述します。"モデル次数"は、分母多項式の次数と等しくなります。分母多項式の根はモデルの"極"と呼ばれます。分子多項式の根はモデルの"零点"と呼ばれます。

伝達関数モデルのパラメーターはその極、零点、および伝達遅延です。

連続時間では、伝達関数モデルは次の形式になります。

$Y (s) = \frac{n u m (s)}{d e n (s)} U (s) + E (s)$

ここで、Y(s)、U(s)、および E(s) はそれぞれ出力、入力、およびノイズのラプラス変換を表します。num(s) および den(s) は、入力と出力間の関係を定義する分子多項式と分母多項式を表します。

详细については，什么是传输功能模型？を参照してください。

アプリ

Identify models of dynamic systems from measured data

`idtf`	Transfer function model with identifiable parameters
`tfest`	Estimate transfer function
`pem`	Prediction error minimization for refining linear and nonlinear models

`delayest`	Estimate time delay (dead time) from data
`init`	Set or randomize initial parameter values

`tfdata`	伝达关数データアクセスする
`getpvec`	Obtain model parameters and associated uncertainty data
`setpvec`	Modify values of model parameters
`getpar`	Obtain attributes such as values and bounds of linear model parameters
`setpar`	Set attributes such as values and bounds of linear model parameters

tfestOptions Option set fortfest

什么是传输功能模型？
Transfer function models describe the relationship between the inputs and outputs of a system using a ratio of polynomials. Themodel orderis equal to the order of the denominator polynomial. The roots of the denominator polynomial are referred to as the model杆. The roots of the numerator polynomial are referred to as the modelzeros.
Estimate Transfer Function Models in the System Identification App
Use the app to set model configuration and estimation options for estimating a transfer function model.
Estimate Transfer Function Models at the Command Line
General workflow for estimating transfer function models at the command line.
Data Supported by Transfer Function Models
传输功能识别的估计数据的特征。

Estimate Transfer Function Models by Specifying Number of Poles
This example shows how to identify a transfer function containing a specified number of poles for given data.
Estimate Transfer Function Models with Transport Delay to Fit Given Frequency-Response Data
此示例显示了如何识别传输函数以符合给定频率响应数据（FRD），其中包含由输入延迟引起的附加相位滚动。
Estimate Transfer Function Models With Prior Knowledge of Model Structure and Constraints
此示例显示了当已知预期模型的结构并将约束应用于分子和分母系数时，如何估计传输函数模型。
Estimate Transfer Functions with Delays
This example shows how to estimate transfer function models with I/O delays.
Estimate Transfer Function Models with Unknown Transport Delays
This example shows how to estimate a transfer function model with unknown transport delays and apply an upper bound on the unknown transport delays.

Troubleshoot Frequency-Domain Identification of Transfer Function Models
Improve frequency-domain model estimation by preprocessing data and applying frequency-dependent weighting filters.

传输功能结构规范
Specify the values and constraints for the numerator, denominator and transport delays.
Specifying Initial Conditions for Iterative Estimation of Transfer Functions
指定初始条件是如何处理的during model estimation in the app and at the command line.