Forthcoming articles

International Journal of Vehicle Noise and Vibration

International Journal of Vehicle Noise and Vibration (IJVNV)

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International Journal of Vehicle Noise and Vibration (12 papers in press)

Regular Issues

  • Three cylinder TGDI+CVT equipped driveline torsional vibration mode study over driveline component inertia/torsional stiffness   Order a copy of this article
    by Qian Zhao 
    Abstract: It is already known how MT equipped driveline torsional modes are distributed and influenced, and that is successfully applied to MT equipped vehicle NVH problem solving. However, it is still marginal for systematic CVT equipped driveline torsional modes sensitivity analysis, hence it is meaningful to establish the CVT driveline torsional vibration mode distribution and sensitivity to driveline component inertia/torsional stiffness. Thus the right driveline component parameters could be predefined from the very start of driveline development or tuned during the refining stage. The aim of this paper is to find out CVT equipped driveline torsional vibration mode sensitivity to driveline component inertia/torsional stiffness and establish rules to tune the driveline torsional vibration modes to mitigate torsional vibration-induced NVH issues.
    Keywords: driveline; torsional vibration; CVT; inertia; torsional stiffness; sensitivity study.

  • Vibration suppression of a car engine frame via tuned vibration Absorber Design   Order a copy of this article
    by Jun Wei Sam, Hock Khuen Cheow, Jee-Hou Ho, Hoon Kiat Ng, Ai Bao Chai 
    Abstract: Whole body vibration degrades passengers ride comfort, which significantly affects their perception towards overall vehicle quality and induces health concerning issues under long term exposure. Motivated by the qualitative perception of whole body vibration experienced by users during vehicle ride, this paper focuses on the vibration characterisation of a car engine frame and proposes a design and implementation of a tuned vibration absorber (TVA) as the vibration attenuation solution in addressing the vertical vibrations, which are most perceived at the idling condition. TVA with frequency intentionally detuned to avoid exciting the second structural resonance throughout the nominal engine idle operating frequency results in a vibration acceleration amplitude reduction of 30.3% at the second order. The result shows that TVA is effective in attenuating tonal vibration at a particular troublesome frequency, such as the second order tonal vibration commonly experienced by conventional inline 4-cylinder engines.
    Keywords: vibration analysis; vibration attenuation; tuned vibration absorber.

  • Application of optimised neural networks models in gears and bearings faults diagnosis   Order a copy of this article
    by Kaaïs Khoualdia, Elia Hadjadj Aoul, Tarek Khoualdia 
    Abstract: Gears and bearings are one of the most important machine components in the industrial world and detection of their faults has become a major trend. In the present article, in order to bring a reliable methodology for monitoring and diagnosis of rotating machinery failures, a test rig is implemented. However, to diagnose combined faults of gears and bearings, a monitoring system based on neural network model (NNM), is proposed. To train and test the NNM, the principal high frequency indicators, determined with the collected time domain vibration data, and codes of defects are used respectively as input and output data. A comparison of two learning algorithms, optimised by the Taguchi method, was done to determine the best NNM. Therefore, the proposed method is effective to study other various industrial cases.
    Keywords: gear and bearing combined defects; fault vibration analysis; design of experiment; ANN; Taguchi method.

  • Effects of dampers on piston slapping motion   Order a copy of this article
    by Faisal O. Mahroogi, S. Narayan 
    Abstract: The secondary motion of piston skirt is a key contributor to Noise, Vibration and Harshness (NVH) emissions from an internal combustion engine. Previous works have focused on various mathematical models of this motion. In the present work, an overview of piston secondary motion is discussed. The scope of using a novel indirect method to control this motion is presented that involves use of vibration dampers. With use of suitable dampers a reduction up to the order of 50% was visualised. The discussed methodology can be used to design an optimised profile of skirt in order to control noise and vibrations emitted and hence satisfy customer benchmarks.
    Keywords: vehicle noise; vehicle vibration; piston secondary motion; energy absorption.

  • Identify challenges in vibration measurements for rotating tyres using a finite element model   Order a copy of this article
    by Aakash Mange, Mohammad Behroozi, Javad Baqersad 
    Abstract: It is critical to identify the vibration characteristics of tyres when a vehicle travels on rough surfaces because the excitation from the road is transmitted to the axle through tyres. These vibrations can ultimately transfer into the cabin at an occupants interface points (seat, floor, steering wheel) and make the ride unpleasant for them. Experimental modal analysis using contact-based sensors such as accelerometers is usually used to obtain the modal parameters of non-rotating tyres. However, the mode shapes of tyres can significantly change when rotating. The non-contact techniques such as digital image correlation (DIC) has enabled engineers to capture 3D response of tyres during rotation. The acquired response can include deformations of the tyre at its resonant modes and the response of the tyre due to the excitations at harmonics of the rotation frequency. This makes it challenging to identify modes of the tyre. In the current paper, the measurements from a tyre testing on a dynamometer are replicated using a finite element analysis to identify the feasibility of obtaining mode shapes using data from a rotating tyre. Performing vibration analysis using computer-aided engineering (CAE) reduces the human effort of executing the complex experimental setup and performing the tests. Furthermore, it provides test engineers with an understanding of the dynamic performance of tyres. In this work, an explicit finite element analysis was performed on the rolling tyre. Using the data from the simulation, an operational modal analysis was performed to extract the modal parameters of the tyre in rolling condition. The results are analysed with those obtained from the experimentation of the Kettering Formula SAE tyre.
    Keywords: tyre; NVH; finite element analysis; DIC; modal analysis.

  • Drum brake noise reduction   Order a copy of this article
    by Sushant Magdum, Samir Kumbhar, Karanam Venkata Mangaraju, Venkatesh Govindan 
    Abstract: Squeal noise generally occurs by the friction-induced self-excited vibration in the braking system, which greatly affects rider comfort as well as the surrounding noise level. The reduction in drum brake squeal noise has become a more challenging and trending problem in two-wheeler industries. In this paper, squeal noise is reduced by changing the stiffness of brake shoe and liners by means of liner modification with different width and depth of the liner slot. The effect of changes in liner geometry on drum brake squeal noise reduction is studied analytically and verified experimentally. A full nonlinear perturbed modal analysis is used to solve the complex eigenvalue problem, which helps to know the stability of the system. In order to validate the analytical results, experimental tests are performed at a certain slow speed having low brake pedal force. The experimental results show that the drum brake squeal noise is found to be reduced by a significant amount by applying the proposed method. It is found that significant modification in the geometry of the liner in view of noise reduction has little effect on vehicle performance.
    Keywords: squeal noise; drum brake; full nonlinear perturbed modal analysis; stability.

  • Fatigue life study of suspension ball joints on the basis of ride quality   Order a copy of this article
    by Naveed Ahmed Khatri, Fadly Jashi Darsivan, Waleed F. Faris, Ahmad Faris Bin Ismail 
    Abstract: The MacPherson quarter car model was used to determine the fatigue life of a suspension ball joint using a non-conventional approach that combined rigid body dynamics with finite element (FE) analysis. In this research, a quarter car model was subjected to the ISO random road profile with a pothole and a speed bump in order to obtain the ride quality and the reaction forces occurring at the ball joint. After classifying three ride qualities, another simulation was conducted on this model to study the stress distributions, in which the ball joint and its socket were treated as flexible bodies. Finally, based on the results of the FE analysis, the fatigue life of the joint was measured for each ride quality. Based on the findings, it was concluded that a good ride quality has an adverse effect on the fatigue life of the ball joint component. ANSYS Workbench and CATIA V5 were used for modelling and simulation.
    Keywords: quarter car; suspension ball joint; fatigue life; ride quality; reaction forces; FEA; ANSYS.

  • Magneto-rheological damper semi-active suspension system control using fuzzy logic controller compared with optimised passive suspension   Order a copy of this article
    by Waleed Faris, Nouby Ghazaly 
    Abstract: Various technologies are applied to vehicle suspension, because of the increasing demand for vehicle stability and passenger comfort. The magnetorheological damper has the ability to adjust the damping coefficient dynamically, and fuzzy logic controller development enables us to obtain the desired damping force. The combination of using magnetorheological damper and controlling it using fuzzy logic will improve the performance of the suspension system. A two degree of freedom quarter car semi-active Bouc wen Magneto Rheological damper model simulated in Simulink composed by a random road profile was used. The controlled magneto-rheological semi-active suspension system was compared by passive suspension system and optimised passive suspension system. The result shows that the magneto-rheological semi-active suspension system controlled using fuzzy logic controller gives better ride comfort and stability than the passive suspension and optimised system. The results show that the MR reduction in acceleration is about 90%, suspension working space about 81%, the tyre deflection 93% and the jerk about 95% compared with the passive suspension system. Also the MR reduction in acceleration is about 96%, suspension working space about 77%, the tyre deflection 90% and the jerk about 95% compared with the optimised passive suspension system. The results are showed in time domain, frequency domain and root mean square values.
    Keywords: quarter car model; semi-active suspension system; MR damper; fuzzy logic controller.

  • Passenger body vibration analysis in active quarter car model using PID sliding surface based variable gain super twisting control   Order a copy of this article
    by Dev Dutt Singh 
    Abstract: This paper is related to passenger ride comfort improvement using an active quarter car system. The selected control strategies include PID-based Super Twisting Control (PID-STC) and PID-based Variable Gain Super Twisting Control (PID-VGSTC) for reducing the passenger body vibration response. ISO 8608 standard is used for random road profile generation while ISO 2631-1 standard guidelines are used for ride comfort comparison. The ride comfort performance of passenger body is evaluated and compared using simulation results taking acceleration and displacement response. The ride comfort improvement results shown by active suspension with PID-VGSTC controller were highest compared with other control strategies.
    Keywords: quarter car model; passenger ride comfort; PID-VGSTC control; ISO 8608 standard; ISO 2631-1 standard.

  • Analysis of ride and stability of an ICF railway coach   Order a copy of this article
    by Rakesh Chandmal Sharma, Sunil Kumar Sharma 
    Abstract: Suspension parameters influence the ride and stability of the rail vehicle simultaneously. This research work analyses the lateral ride and stability of 28 degrees of freedom model of an ICF General Sleeper railway coach formulated with Lagrangian dynamics. The lateral ride is evaluated considering ISO 2631-1 ride specifications. The stability is determined on the basis of eigenvalue analysis carried out using MATLAB environment. The sensitivity of primary and secondary suspension parameters on ride and stability is analysed independently. Finally, suitable suggestions are given for values of primary and secondary suspension parameters to obtain improved lateral ride and stability.
    Keywords: Lagrangian dynamics; primary suspension; secondary suspension; ISO 2631-1; ride; stability.

  • Active vibration analysis of passenger biodynamics in a quarter car model with summing ANFIS-based PID super twisting control   Order a copy of this article
    by Dev Dutt Singh 
    Abstract: Human health and safety issue is an interesting and challenging problem in road vehicles. Attenuation of whole body vibration can be achieved by using various controllers in a designed and developed vehicle system. Hence, this research work is aimed at vibration analysis of a passenger body under random road types, developed using ISO 8608:2016 standard. Two controllers, named as PID-based Super Twisting Control (PID-STC) and Summing ANFIS PID-based Super Twisting Control (SAPID-STC) are applied separately in suspension for vibration comparison of the combined human body-quarter car system. The ride comfort analysis is performed using simulation results of human body response, taking the 2631-1:1997 standard. Numerical and graphical results clearly proved the superiority of SAPID-STC control in suppressing the undesired effects of vibrations on the human body, including discomfort, ride discomfort and motion sickness.
    Keywords: quarter car model; ANFIS model; SAPID-STC control; vibrations; ride comfort.

  • Chassis integrated control and energy efficiency optimisation for over-actuated electric ground vehicles   Order a copy of this article
    by Yitong Song, Hongyu Shu, Xianbao Chen, Changqing Jing, Cheng Guo 
    Abstract: Stability and economy are both important for electric vehicles (EVs). A novel integrated controller with active front steering (AFS) and direct yaw moment control (DYC) is proposed here to realise vehicle stability control and energy efficiency optimisation. In the upper controller, the stability controller is designed based on the dual sliding mode control (DSMC) to calculate the desired active steering angle and yaw moment to improve the stability. In the lower controller, the energy efficiency optimisation controller is designed by looking-up the driving/braking efficiency maps of in-wheel motors to optimise the longitudinal tyre forces, aiming to make the in-wheel motors work at the high efficient area. The simulations are conducted on the Simulink/CarSim platform and the results controlled by two different controllers are compared. The results show that the two controllers could improve the vehicle stability, while the integrated controller could decrease the total energy consumption of in-wheel motors.
    Keywords: direct yaw-moment control; active front steering; sliding model control; energy efficiency optimisation.