scholarly journals The signal demodulation techniques

2020 ◽  
pp. 51-83
Author(s):  
Yassine Amirat ◽  
Mohamed Benbouzid
Keyword(s):  
Signal Demodulation

Study on FSK Signal Demodulation Based on Chirp-Z Transform

2012 ◽  
Vol 532-533 ◽  
pp. 827-831
Author(s):  
Jiang Hua Xia ◽  
Jing Guo ◽  
Xiao Ming Wang
Keyword(s):  
Frequency Shift ◽  
Matlab Simulation ◽  
A Algorithm ◽  
Signal Parameters ◽  
Detailed Explanation ◽  
Symbol Rate ◽  
Shift Keying ◽  
Signal Demodulation ◽  
Track Circuits ◽  
Strong Ability

The Frequency-Shift Keying (FSK) signal is frequently used in track circuits because of the strong ability of resistance interference. Symbol rate is one of the important signal parameters for safety of railway. The paper propose a algorithm of high precise detectation of FSK signal using Chirp-Z transform; Theoretically gives the detailed explanation to the major technique, and has carried on the Matlab simulation, The simulation result indicates this method during the enhancement is shifted signal examination precision, reduced the computation order of complexity.

Improved Local Mean Decomposition and its Application to Fault Diagnosis of Train Bearing

2013 ◽  
Vol 819 ◽  
pp. 155-159
Author(s):  
Peng Wang ◽  
Huai Xiang Ma
Keyword(s):  
Fault Diagnosis ◽  
Vibration Signal ◽  
Processing Method ◽  
Nonstationary Signal ◽  
Practical Application ◽  
Local Mean Decomposition ◽  
Signal Processing Method ◽  
Signal Demodulation ◽  
Improvement Method ◽  
Local Mean

Fault diagnosis of train bearing is an important method to ensure the security of railway. The key to the fault diagnosis is the method of vibration signal demodulation. The local mean decomposition (LMD) is a self-adapted signal processing method which has a good performance in nonlinear nonstationary signal demodulation. The improved LMD method based on kurtosis criterion can prevent errors in the process of calculating the product functions. With the verification of simulation and wheel set experiment, the improvement method has been certified usefully in practical application.

Position and Speed Detection of Synchronous Motor Rotor

2012 ◽  
Vol 236-237 ◽  
pp. 61-66
Author(s):  
R.M. Tao ◽  
X. Tao ◽  
C.R. Xiong
Keyword(s):  
Machine Tools ◽  
High Performance ◽  
Synchronous Motor ◽  
Pole Position ◽  
Cnc Machine Tools ◽  
Detection Accuracy ◽  
Cnc Machine ◽  
Velocity Signal ◽  
Signal Demodulation ◽  
Server System

This article describes a method to detect the position and speed in a rotary transformer pole AC synchronous motor. This method gives the pole position and velocity signal demodulation circuit and analyses the demodulation principle. After practical testing, this approach is reliable with high detection accuracy. Therefore, it is fully able to meet the needs of CNC machine tools with high performance in AC server system.

Interference signal demodulation for nanopositioning and nanomeasuring machines

2012 ◽  
Vol 23 (7) ◽  
pp. 074004 ◽  
Author(s):  
T Hausotte ◽  
B Percle ◽  
U Gerhardt ◽  
D Dontsov ◽  
E Manske ◽  
...  
Keyword(s):  
Interference Signal ◽  
Signal Demodulation
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