Fractional Dynamics in Mechanical Manipulation

2007 ◽  
Author(s):  
Miguel F. M. Lima ◽  
J. A. Tenreiro Machado ◽  
Manuel Criso´stomo
Keyword(s):  
Experimental Study ◽  
Control System ◽  
Real Time ◽  
Fourier Spectrum ◽  
Fractional Dynamics ◽  
Second Phase ◽  
Experimental Setup ◽  
Recorded Data ◽  
Analysis Package ◽  
Mechanical Manipulation

This paper analyzes the signals captured during the movement of a mechanical manipulator carrying a liquid container. In order to study the signals an experimental setup is implemented. The system acquires data from the sensors, in real time, and, in a second phase, processes them through an analysis package. The analysis package runs off-line and handles the recorded data. The results show that the Fourier spectrum of several signals presents a fractional behavior. The experimental study provides useful information that can assist in the design of a control system to be used in reducing or eliminating the effect of vibrations.

Fractional Dynamics in Mechanical Manipulation

2008 ◽  
Vol 3 (2) ◽  
Author(s):  
Miguel F. M. Lima ◽  
J. A. Tenreiro Machado ◽  
Manuel Crisóstomo
Keyword(s):  
Experimental Study ◽  
Control System ◽  
Real Time ◽  
Fourier Spectrum ◽  
Fractional Dynamics ◽  
Second Phase ◽  
Experimental Setup ◽  
Recorded Data ◽  
Analysis Package ◽  
Mechanical Manipulation

This paper analyzes the signals captured during the movement of a mechanical manipulator carrying a liquid container. In order to study the signals, an experimental setup is implemented. The system acquires data from the sensors, in real time, and, in a second phase, processes them through an analysis package. The analysis package runs offline and handles the recorded data. The results show that the Fourier spectrum of several signals presents a fractional behavior. The experimental study provides useful information that can assist in the design of a control system to be used in reducing or eliminating the effect of vibrations.

scholarly journals Fractional dynamics in liquid manipulation

2010 ◽  
Vol 58 (4) ◽  
pp. 555-560
Author(s):  
M. Lima ◽  
J. Machado
Keyword(s):  
Experimental Study ◽  
Control System ◽  
Fractional Calculus ◽  
Trajectory Planning ◽  
Fourier Spectrum ◽  
Fractional Dynamics ◽  
Second Phase ◽  
Experimental Setup ◽  
Recorded Data ◽  
Analysis Package

Fractional dynamics in liquid manipulationThis paper presents a fractional calculus perspective in the study of signals captured during the movement of a mechanical manipulator carrying a liquid container. In order to study the signals an experimental setup is implemented. The system acquires data from the sensors, in real time, and, in a second phase, processes them through an analysis package. The analysis package runs off-line and handles the recorded data. The results show that the Fourier spectrum of several signals presents a fractional behavior. The experimental study provides useful information that can assist in the design of a control system and the trajectory planning to be used in reducing or eliminating the effect of vibrations.

scholarly journals Experimental Signal Analysis of Robot Impacts in a Fractional Calculus Perspective

2007 ◽  
Vol 11 (9) ◽  
pp. 1079-1085 ◽  
Author(s):  
Miguel F. M. Lima ◽  
◽  
J. A. Tenreiro Machado ◽  
Manuel Crisóstomo ◽  
◽  
...  
Keyword(s):  
Signal Processing ◽  
Fourier Transform ◽  
Control System ◽  
Fractional Calculus ◽  
Signal Analysis ◽  
Fourier Spectrum ◽  
Time Windows ◽  
Experimental Setup ◽  
Analysis Package ◽  
Line Analysis

This paper presents a study of the signals captured during impacts and vibrations of a mechanical manipulator. In order to acquire and study the signals an experimental setup is implemented. The system acquires data from the sensors, in real time, and processes it through an off-line analysis package. The study is developed based on a set of signal processing tools, such as the Fast Fourier Transform and the windowed Fourier transform. The signals whose Fourier spectrum presents a non integer behavior are pointed out and analyzed using several time windows. The experimental results provide useful information that can assist in the design of a control system to deal with the unwanted effects of vibrations.

Dynamics Characteristics and Diagnosis of a Rotor-Bearing's System Through a Dimensional Analysis Approach: An Experimental Study

2018 ◽  
Vol 14 (1) ◽  
Author(s):  
R. G. Desavale
Keyword(s):  
Experimental Study ◽  
Real Time ◽  
Dimensional Analysis ◽  
Empirical Model ◽  
Vibration Amplitude ◽  
Experimental Setup ◽  
Vibration Characteristic ◽  
Model Predictions ◽  
Rotor Bearing ◽  
Bearing System

In this work, vibration characteristic diagnosis of misalignment rotor in loosely fitted bearing is investigated using dimensional analysis (DA) approach. A comprehensive empirical model (EM) using nondimensional parameters is developed to diagnose the rotor-bearing system, and EM model has been validated through an experimental setup developed in-house. Experiments are performed for various defects such as misalignment and bearing looseness. The EM results can be used to monitor the real-time conditions of the rotor-bearing system. This work also presents the effect of misalignment and bearing looseness under various load and speed conditions. Further, work has been extended to predict the combined effect of bearing looseness and misalignment. It has been found that EM model predictions of the vibration amplitude are better when compared to experimental results.

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