System Identification of the Machining Process

1975 ◽  
Vol 97 (3) ◽  
pp. 1143-1148 ◽  
Author(s):  
D. A. Milner
Keyword(s):  
System Identification ◽  
Transfer Function ◽  
Computer Program ◽  
Frequency Response ◽  
Machining Process ◽  
Response Data ◽  
Identification Method ◽  
Function Analyzer

This paper describes an identification method for determining the transfer function of a system by the use of a computer program. Frequency response data is obtained by the use of a Digital Transfer Function Analyzer and, by on- or off-line computing, the transfer function of the desired system is obtained.

State-space system identification from closed-loop frequency response data

1996 ◽  
Vol 19 (6) ◽  
pp. 1378-1380 ◽  
Author(s):  
Jen-Kuang Huang ◽  
Hyun Chang Lee ◽  
Marco P. Schoen ◽  
Min-Hung Hsiao
Keyword(s):  
System Identification ◽  
Frequency Response ◽  
State Space ◽  
Closed Loop ◽  
Space System ◽  
Response Data ◽  
State Space System

Identifying a Transfer Function From a Frequency Response

2007 ◽  
Author(s):  
Manuel Duarte Ortigueira ◽  
Duarte Vale´rio ◽  
Jose´ Sa´ da Costa
Keyword(s):  
System Identification ◽  
Transfer Function ◽  
Frequency Response ◽  
Transfer Functions ◽  
Sea Waves ◽  
Low Frequencies ◽  
Wide Range ◽  
Simulation Results ◽  
New Formulation ◽  
Pseudo Inverse

In this paper, the classic Levy identification method is reviewed and reformulated using a complex representation. This new formulation is able to solve the well known bias of the classic method at low frequencies. The formulation is generic, addressing both integer order and fractional order transfer functions. A new algorithm based on a stacked matrix and its pseudo-inverse is proposed to accommodate the data over a wide range of frequencies. Several simulation results are presented, together with a real system identification. This system is the Archimedes Wave Swing, a prototype of a device to convert the energy of sea waves into electricity.

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