Iterative learning from suppressing vibrations in construction machinery using magnetorheological dampers

Rafajłowicz, Wojciech; Więckowski, Jędrzej; Moczko, P.; Rafajłowicz, Ewaryst

doi:10.1016/j.autcon.2020.103326

Cited by 13 publications

(9 citation statements)

References 32 publications

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“…The measurements presented in the article were conducted with the aim of developing a control algorithm for the purposes of MR dampers. Details of the algorithm are presented in [7] .…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Data from vibration measurement in a bucket wheel excavator operator's cabin with the aim of vibrations damping

2021

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In the paper the authors present the procedure of measuring vibration and obtained data accruing in a bucket wheel excavator's operator cabin. Details of the selection and location of the measuring points are firstly given. In the following part, the example of for the bucket wheel excavator SchRs 1200, will be presented. This machine is in use at one of Poland's open cast mins. The operating conditions are briefly characterized in the descriptions of the measurement series. The measuring equipment is also presented. The recorded data are presented in two ways. The first of the presents time waveforms for each measuring channel. The second one presents Fast Fourier Transform (FFT) spectrums after filtering the measured signals. The obtained data is used to develop a vibrations control algorithm.

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“…The measurements presented in the article were conducted with the aim of developing a control algorithm for the purposes of MR dampers. Details of the algorithm are presented in [7] .…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Data from vibration measurement in a bucket wheel excavator operator's cabin with the aim of vibrations damping

2021

Self Cite

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“…The real-time control of the MR damper applied for a driver seat with on-off and continuously variable control was presented in [13]. Further, the results of vibration suppression for an operator cabin in bucket wheel excavators were presented in [38], where the authors proposed an iterative learning method for optimal control.…”

Section: Control Of Semi-active Suspensionmentioning

confidence: 99%

Driving Safety Improved with Control of Magnetorheological Dampers in Vehicle Suspension

Krauze

Kasprzyk

2020

Applied Sciences

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The article is dedicated to the control of magnetorheological dampers (MR) included in a semi-active suspension of an all-terrain vehicle moving along a rough road profile. The simulation results of a half-car model and selected feedback vibration control algorithms are presented and analysed with respect to the improvement of driving safety features, such as road holding and vehicle handling. Constant control currents correspond to the passive suspension of different damping parameters. Independent Skyhook control of suspension parts represents the robust and widely used semi-active algorithm. Furthermore, its extension allows for the control of vehicle body heave and pitch vibration modes. Tests of the algorithms are carried out for a vehicle model that is synthesised with particular emphasis on mapping different phenomena occurring in a moving vehicle. The coupling of the vehicle to the road and environment is described by non-linear tire-road friction, rolling resistance, and aerodynamic drag. The pitching behaviour of the vehicle body, as well as the deflection of the suspension, is described by a suspension sub-model that exhibits four degrees of freedom. Further, three degrees of freedom of the complete model describe longitudinal movement of the vehicle and angular motion of its wheels. The MR damper model that is based on hyperbolic tangent function is favoured for describing the key phenomena of the MR damper behaviour, including non-linear shape and force saturation that are represented by force-velocity characteristics. The applied simulation environment is used for the evaluation of different semi-active control algorithms supported by an inverse MR damper model. The vehicle model is subjected to vibration excitation that is induced by road irregularities and road manoeuvres, such as accelerating and braking. The implemented control algorithms and different configurations of passive suspension are compared while using driving-safety-related quality indices.

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“…MR dampers, as an example of a semi-active system, are favored over active solutions for their low energy consumption. They are widely used for vibration control in mountain bikes [24], automotive applications and all-terrain vehicles [25]; for improvement of driving safety [26]; in the construction machinery [27]; and in buildings and bridges [28].…”

Section: Introductionmentioning

confidence: 99%

Trajectory Control for Vibrating Screen with Magnetorheological Dampers

Ogonowski

Krauze

2022

Sensors

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The article presents a method of vibrating screen trajectory control based on MR (magnetorheological) dampers applied in a screen suspension. A mathematical description of the dynamic screen model was derived, and parameters of this model were estimated based on experimental data from a semi-industrial vibrating screen. The investigated screen included a single mechanical exciter with unbalanced masses, generating a circular vibration trajectory and operating with over-resonant frequency close to 19 Hz. It was experimentally tested in several phases of operation: start-up, nominal operation at a target vibration frequency and shutdown. The implemented screen model was further extended and included several MR dampers oriented horizontally and vertically in the form of Bouc–Wen models. The Bouc–Wen model was identified based on experiments carried out for an MR damper subjected to harmonic excitations generated by the MTS (material testing system). Dominant frequencies of excitation varied by up to 20 Hz during experiments. The main novelty of the reported solution is that according to the proposed control algorithm, the desired forces generated by MR dampers emulate an additional virtual mechanical exciter of the vibrating screen. In turn, it interacts with the available exciter, resulting in conversion of the trajectory from circular to linear, which was validated in the presented study. For the purpose of simulation accuracy, the desired control force was additionally limited within the simulator by MR damper dissipative domain, which maps the constraints of a semi-active damper. The presented approach allows one to obtain a close to linear trajectory with only one exciter and with semi-active control of suspension stiffness. The results were successfully repeated with different configurations of desired trajectory, indicating that the effectiveness of the desired linear trajectory generation depends on its orientation. The reported findings may lead to the design of new vibrating screen constructions, taking advantage of the semi-active control of a suspension in the attenuation of disturbance resulting from varying processed material parameters.

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Iterative learning from suppressing vibrations in construction machinery using magnetorheological dampers

Cited by 13 publications

References 32 publications

Data from vibration measurement in a bucket wheel excavator operator's cabin with the aim of vibrations damping

Data from vibration measurement in a bucket wheel excavator operator's cabin with the aim of vibrations damping

Driving Safety Improved with Control of Magnetorheological Dampers in Vehicle Suspension

Trajectory Control for Vibrating Screen with Magnetorheological Dampers

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