The scaling laws of mechanical structures are usually obtained from their equations of motion or from a dimensional anal. In the presence of rsus, not only can road and traf. Mechanical systems and signal processing 84 2017 241264 7. Three setups, developed to simulate the dynamics of the system and to predict the squeal occurrence, together with their corresponding models, are discussed in this paper. Welcome to mechanical systems and signal processing lab.
The model development is very general, so it could also be extended to the. Mechanical systems and signal processing 31 2012 176195. Early efforts address this issue by approximating the time lag as a constant time delay and including compensation in the system 5. Due to the fact that actuator dynamics amplitude and phase are rate dependent.
Under harmonic excitation, hydraulic bushings exhibit signi. Rhoads mechanical systems and signal processing 84 2017 241264 electromagnetically transduced microresonator. Mechanical systems and signal processing 35 20 324344. In section 3, a singlephase current model for mechanical fault signature in electrical signals is extended to threephase current signals. Then, the model estimation problem is formulated in a. A mechanical fault indicator relying jointly on the proposed threephase signal model and on instantaneous symmetrical components is then developed with the corresponding estimation algorithm.
Mechanical systems and signal processing 75 2016 589606 under harmonic excitation, hydraulic bushings exhibit signi. Mechanical systems and signal processing 23 2009 170194. Bistable systems also were employed in electromagnetic generators 17,18. Mechanical systems and signal processing 25 2011 12271247. Mechanical systems and signal processing 75 2016 589606. Mechanical systems and signal processing 103 2018 368380 369. Guidelines for machine learning papers in mssp in the last few years, mssp has been receiving a large number of papers relating to machine learning or soft computing applied in a mechanical systems context. Mechanical systems and signal processing 5455 2015 405416 the goal of the analysis presented here is to establish the appropriate excitation to lead to the increase of power output in vibrationbased energy harvesting system subjected to random excitations.
Sound source estimation via the em algorithm in this section, the sound propagation model is presented first. The goal of the analysis presented here is to establish the appropriate excitation to lead to the increase of power output in vibrationbased energy harvesting system subjected to random excitations. Mechanical systems and signal processing 28 2012 319. Guide for authors mechanical systems and signal processing. Thus the advantage of digital signal processing, is that it is very economic and efficient manner in which signals can be processed to extract features and gain insight into the mechanical system producing such signals. Introduction lamb waves, the elastic disturbance disseminating in a thin plate or shelllike structure, have been the subject of intense scrutiny over the years, based on which a diversity of nondestructive evaluation nde and structural health monitoring. The ratios of displacements of given masses are constant for all time i. Bayesian statistical framework consider a parameterized class of structural models e. Mechanical systems and signal processing 5051 2015 1126 a costeffective alternative to investigate parametric studies of structural damage due to the cost and safety implications associated with fullscale destructive testing 1. Mechanical systems and signal processing closing 11,17. Mechanical systems and signal processing xxx xxxx xxx please cite this article as. Wang mechanical systems and signal processing interval bounds can be con.
Mechanical systems and signal processing mssp is an interdisciplinary journal in mechanical, aerospace and civil engineering with the purpose of reporting scientific advancements of the highest quality arising from new techniques in sensing, instrumentation, signal processing, modelling and control of dynamic systems. Furthermore, due to roller slippage 2,3, the repetition period of individual impulses may vary slightly. Mechanical systems and signal processing 23 2009 25902607. Indeed, the steadystate response to lowfrequency base oscillations yields the periodic response shown in fig. Conventional double row angular contact ball bearings have solid inner and outer races. Mechanical systems and signal processing 127 2019 5530.
Constrained maximum likelihood modal parameter identi. Calculate the best linear approximation bla gb bla from the inputoutput data and its total covariance r g bla using robust method 15,16. Unfortunately, due to experimental constraints, the majority of system identification methods that have been developed cannot be used with micronanosystems, as a lockin amplifier is used to acquire the typically small and noisy response of. Conventional computerized signal acquisition system. Mechanical systems and signal processing 23 2009 170194 171 article in press and nonlinear modal analysis, nonlinear model reduction and the study of localization phenomena are then discussed in. Mechanical systems and signal processing rg journal impact. Typically, the dynamic properties of assemblies may differ from those of components due to preload and boundary condition effects.
Mssp papers are expected to make a demonstrable original contribution to engineering knowledge, which should be significant in terms of advancement over established methods. Mechanical systems and signal processing 39 20 227244. Mechanical systems and signal processing please cite this article as. Mechanical systems and signal processing 28 2012 319 the behavior of bridges under traf. Mechanical systems and signal processing 34 20 340352. The variation in the interval between consecutive impulses, represented by independent random values 4, causes smearing of the spectral. Early efforts address this issue by approximating the time lag as a constant. Mechanical systems and signal processing 34 20 340352 boring bar endowed with a passive vibration absorber was modeled by miguelez et al. T comprises the three current signals, the vector a. Mechanical systems and signal processing vols 7273, pages. In either cases, the measured position is then compared to the desired location of the endeffector. A tbm is a large mechanical system which consists of several subsystems, e. Bearing bushings are supported in rubber o rings, which ensure sealing of oil inlet and at the same time enable movement of.
Mechanical systems and signal processing where f are the external mechanical forces, r is the mass density and r o are the volume density of electric charges. Mechanical systems and signal processing in the presence of rsus, not only can road and traf. Mechanical systems and signal processing 6061 2015 182197. Mechanical systems and signal processing 31 2012 176195 177 the resulting vibratory motions of the shaft also shown in fig. The equality holds if and only if the components are stationary. Xian jiaotong university school of mechanical engineering institute of design science and basic components, xian, china p. Mechanical systems and signal processing 110 2018 590610. Mechanical systems and signal processing 48 2014 260273.
Mechanical systems and signal processing 25 2011 12271247 sine wave at the undamped natural frequency of a linear mode and enables small groups of modes coupled by nonlinear forces to be excited. Mechanical systems and signal processing editorial board. Mechanical systems and signal processing 127 2019 5530 by using either forward kinematics relations 17, or an accurate position sensor 18,19. Mechanical systems and signal processing journal elsevier. Volume 129 pages 1780 15 august 2019 download full issue. Article in press backlash and friction in control surfaces, hardening nonlinearities in enginetopylon connections, saturation effects in hydraulic actuators, plus any underlying distributed nonlinearity. Department of mechanical engineering, the hong kong polytechnic university, kowloon, hong kong. Although the mechanism of nonlinear modulation has not been resolved yet, this finding at least suggests that the excitation levels of the input forces do not necessary have. Mechanical systems and signal processing 5051 2015 1126.
Mechanical systems and signal processing vol 129, pages. Mechanical systems and signal processing 90 2017 317333 contents lists available at sciencedirect mechanical systems and signal processing. Mechanical systems and signal processing the experiments are presented only for radial clearance of 45 mm. The magnetic force adds cubic stiffness nonlinearity and makes the oscillator a duf. For linear systems, normal solutions are periodic with all coordinate motions sharing the same period.
We will start with the basics of dynamic signals, and from then on, the experiments get more interesting. Double row angular contact ball bearings are similar to duplex paired bearings in terms of design and functionality 1. Mssp papers are expected to make a demonstrable original contribution to. Mechanical systems and signal processing 5455 2015 405416. The basics of the signals such as fundamentals of the signals. Mechanical systems and signal processing 103 2018 368380 369 where w is a binary matrix with w ij 0. Crossfertilising research in nonlinear system identification between the mechanical, control and machine learning fields. Duan and singh 9 have approached the judder problem using a sourcepathreceiver network concept where the brake rotor, suspension system, and steering. Mechanical systems and signal processing 104 2018 884895 885. T is the sum of components from different sources, altered by a complexvalued gaussian distributed 57 noise.
The resulted intervalvalued probability density functions rigorously bound the realvalued ones computed from the classical path integral method. Wavebased motion and slewing control of a doubleappendage, flexible system with ungrounded actuator through development of direct actuator force control. Special issues published in mechanical systems and signal processing. Next, the innerloop control commandnamely the desired. Mechanical systems and signal processing online, mechanical systems and signal processing, mssp. Mechanical systems and signal processing special issues.
A tbm is a large mechanical system which consists of several sub systems, e. Mechanical systems and signal processing 3 indeed, the steadystate response to lowfrequency base oscillations yields the periodic response shown in fig. Mechanical systems and signal processing 85 2017 468486 and mode shapes, using system identification techniques such as stochastic subspace identification 11, frequency domain decomposition 12, blind source separation, bayesian operational modal analysis oma 1420, etc. Mechanical systems and signal processing 39 20 227244 229 since the frequency range of interest is well below the longitudinal elastic modes, the two measured eigenvector compo. The incorporation of the frequency modulation information into the proposed bearing fault detection method has eliminated the need for interference. Mechanical systems and signal processing 92 2017 278292 279 in 1, the vector i.
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