JournalTOCs

International Journal of Heavy Vehicle Systems
Journal Prestige (SJR): 0.23

Number of Followers: 7

Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1744-232X - ISSN (Online) 1741-5152
Published by Inderscience Publishers

[450 journals]

Numerical study on whole body vibration evaluation in wheeled and tracked
armoured vehicles
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  Authors: Leonardo Menna Barreto Martinelli, MÃ¡rio Fedatto Neto, Herbert Martins Gomes
  Pages: 137 - 157
  Abstract: The vibration felt by humans can cause discomfort or even produce damage to health. It depends on exposure time, intensity and frequency content. Armoured vehicles are equipment that produce high whole body vibration (WBV) and Impact Vibration (IV) levels. Numerical modelling of the vehicle's vertical dynamics is an adequate tool for the initial design and to evaluate the vibration levels in diverse terrain situations, speed and occupant positioning. In this work, three armoured vehicles are modelled travelling on irregular roads. Comparisons between the vehicles for acceleration levels are performed in terms of WBV and IV. Discussions about each vehicle results are presented along with graphs for ground reaction forces, and acceleration signals at vehicle's body and seats. The analysis of comfort and health risks shows that there is a gradation regarding comfort levels in the investigated vehicles. The tracked vehicle indicates high probability of health risk for training scenarios.
  Keywords: vehicle suspension; armoured vehicles; WBV; whole body vibration; tracked vehicles; comfort
  Citation: International Journal of Heavy Vehicle Systems, Vol. 28, No. 2 (2021) pp. 137 - 157
  PubDate: 2021-06-11T23:20:50-05:00
  DOI: 10.1504/IJHVS.2021.115586
  Issue No: Vol. 28, No. 2 (2021)
Dynamic analysis of gun control system of main battle tank
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  Authors: Leonardo Menna Barreto Martinelli, MÃ¡rio Fedatto Neto, Herbert Martins Gomes
  Pages: 158 - 183
  Abstract: The primary aim of the military tank is to hit on the target efficiently in moving condition on off-track. The battle tank is an assembly of suspension system; mobility drives of fire gun such as elevation drive, azimuth drive; ballistic system and firing system etc. These aforesaid assemble systems are mainly responsible for disturbance in stability of main gun. The track used for battle tank also plays the major role in vibrations. Hence, the stability of gun is only possible when vibrations caused by mobility drives get reduced on dynamic tank gun. Mathematical model of weapon control system is modelled in SIMULINK, all kinds of weapon drives are coupled, using a collective framework of cantilever beam to develop the gun model. The passive dynamic responses of main gun can be observed by these mathematical models. The responses of SIMULINK are validated by a model developed in ADAMS.
  Keywords: WCS; weapon control system; GCS; gun control system; battle tank; elevation mechanism; azimuth mechanism; suspension; ride dynamics
  Citation: International Journal of Heavy Vehicle Systems, Vol. 28, No. 2 (2021) pp. 158 - 183
  PubDate: 2021-06-11T23:20:50-05:00
  DOI: 10.1504/IJHVS.2021.115587
  Issue No: Vol. 28, No. 2 (2021)
An investigation into the ride comfort of buses using an air suspension
system
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  Authors: Vu Van Tan, Truong Manh Hung, Olivier Sename
  Pages: 184 - 205
  Abstract: The paper focuses on the ride comfort criteria of a two-axle bus using an air suspension system. First of all, based on the Gensys model, a nonlinear model of an air spring element linked to an auxiliary air tank is investigated. The parameters of the air spring model are determined through real experiments in both static and dynamic load modes with the error between the theoretical simulation model and the real experimental data being less than 8%. Then, a full bus model using the dependent suspension system takes into account the driver model mentioned in two cases of using air suspension and leaf suspension. Simulation results in the time domain with different motion states show that the ride comfort of the bus using air suspension system is improved by about 20%, when compared to the bus using the leaf suspension system. Meanwhile, the road holding criteria are maintained.
  Keywords: vehicle dynamics; automotive oscillation; suspension system; air suspension system; air spring; ride comfort; road holding; buses; Gensys model
  Citation: International Journal of Heavy Vehicle Systems, Vol. 28, No. 2 (2021) pp. 184 - 205
  PubDate: 2021-06-11T23:20:50-05:00
  DOI: 10.1504/IJHVS.2021.115595
  Issue No: Vol. 28, No. 2 (2021)
Adaptive online estimation of centre of gravity height for commercial
vehicles
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  Authors: Zhijun Fu, Qiang Hu, Bin Li
  Pages: 206 - 225
  Abstract: A novel parameter error driven robust estimation method is proposed for online estimation of centre of gravity (CG) height of a tour bus vehicle. Unlike the commonly used recursive least squares (RLS) method, a parameter error driven updating law is synthesised to ensure improved performance in terms of steady-state error and robust convergence. The stability of the proposed estimation method is illustrated using the Lyapunov approach. The proposed CG estimation method is based on directly measurable lateral acceleration and relative roll angle of the sprung mass, while the high order signals are eliminated using the filtering approach. The validity of the proposed estimation method is illustrated through implementations in TruckSim platform. Simulation results show that the proposed estimation method can yield accurate online estimation of the CG height, together with effective suspension roll stiffness and damping properties.
  Keywords: centre of gravity height estimation; commercial vehicles; parameter estimations; roll dynamics; adaptive estimation
  Citation: International Journal of Heavy Vehicle Systems, Vol. 28, No. 2 (2021) pp. 206 - 225
  PubDate: 2021-06-11T23:20:50-05:00
  DOI: 10.1504/IJHVS.2021.115579
  Issue No: Vol. 28, No. 2 (2021)
Optimum operational conditions of mining trucks based on the vibrational
health risk of the driver
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  Authors: Mohammad Javad Rahimdel, Mehdi Mirzaei
  Pages: 226 - 241
  Abstract: This paper aims to propose the optimum payload and speed limit and load geometry for a heavy duty 60-ton truck in Sungun Copper Mine of Iran as a case study to keep the vibrational health risk at the lowest possible level while maintaining the production rate at the planned level. The root mean square (RMS) of vibrations at different operational conditions was obtained. Then, an optimisation problem was developed to propose the optimum payload and truck speeds at various conditions. The optimum payload was 65 tons. The optimum speed of loaded truck was obtained in the range of 30-35 km/h at good roads and 15 km/h at poor roads. Also, the optimum speed range of empty truck was in the range of 15-20 km/h. Uniform payloads and materials accumulated on the left side can have the lowest and highest effects on the vibrational health risk, respectively.
  Keywords: mining truck; WBV; whole body vibration; optimisation; regression analysis
  Citation: International Journal of Heavy Vehicle Systems, Vol. 28, No. 2 (2021) pp. 226 - 241
  PubDate: 2021-06-11T23:20:50-05:00
  DOI: 10.1504/IJHVS.2021.115578
  Issue No: Vol. 28, No. 2 (2021)
Design and SAM analysis of reconfigurable four-legged mechanism using
single degree of freedom
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  Authors: A. Krishnaraju, H. Abdul Zubar
  Pages: 242 - 261
  Abstract: A number examples of walking equipment integrated with heavy vehicle systems and robots have been conceived, measured and built in the last 25 years to realise a modern field of applications. Compared to wheeled machines, legged and walking machines show the advantage that they can act in highly unstructured terrain without streets or rails. Legged robots cross obstacles more easily and depend upon the environmental situations. In this paper, a proposed kinematic four legged model design is made by linkages using single degree of freedom (DOF), then the modelling and kinematic analysis of a reconfigurable four-legged walking mechanism driven by manual or a single actuator is performed using SAM analyser software. Four bar walking mechanism can be observed by different link length in path movements, velocity, and acceleration. In particular, a suitable model of the leg design and also kinematic analysis is analysed. One of the most important concepts of this research is desired simplicity of the four-legged walking mechanism.
  Keywords: degrees of freedom; walking equipment; integrated system; path trajectory; SAM analyser; simulation; stability
  Citation: International Journal of Heavy Vehicle Systems, Vol. 28, No. 2 (2021) pp. 242 - 261
  PubDate: 2021-06-11T23:20:50-05:00
  DOI: 10.1504/IJHVS.2021.115577
  Issue No: Vol. 28, No. 2 (2021)
A new approach in modelling of hitch joint of a tractor semi-trailer using
virtual Pacejka tyre model
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  Authors: Mohamad Hafiz Harun, Khisbullah Hudha, Pakharuddin Mohd Samin, Saiful Anuar Abu Bakar, Zulkiffli Abd Kadir
  Pages: 262 - 290
  Abstract: In this study, a new approach in modelling of hitch joint of a tractor semi-trailer is proposed by adopting virtual Pacejka tyre model. The virtual Pacejka tyre model is connected with a 16 DOF tractor semi-trailer combinations in Matlab-Simulink software and verified using validated software known as TruckSim. Two sets of simulations are conducted in the verification process which involves a double lane change (DLC) and steep steer cornering (SSC) test. It is observed from the results that by modelling hitch joint as a virtual Pacejka tyre model, the behaviour of the developed model closely follows the behaviour of the validated TruckSim model.
  Keywords: tractor semi-trailer; hitch joint; DLC; double lane change; step steer cornering
  Citation: International Journal of Heavy Vehicle Systems, Vol. 28, No. 2 (2021) pp. 262 - 290
  PubDate: 2021-06-11T23:20:50-05:00
  DOI: 10.1504/IJHVS.2021.115584
  Issue No: Vol. 28, No. 2 (2021)
Impact of a modified braking valve for static and dynamic characteristics
of pneumatic braking systems of agricultural trailers
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  Authors: Zbigniew KamiÅ„ski, Krzysztof Kulikowski
  Pages: 291 - 307
  Abstract: Pneumatic braking systems of agricultural trailers contain brake valves with adjustable predominance of the output pressure relative to the control pressure. The goals of our study were to improve the static and dynamic properties of agricultural trailer pneumatic braking systems by modification of brake valve construction with implementing a throttle valve to the predominance device in valve. Proposed correction device ensures that the intensity of the predominance effect depends on the rate of pressure rise in control chamber of the braking valve. Initial testing of three agricultural trailers' braking systems has confirmed the effect of modifying relay emergency valve to shortening the response time of their braking systems while maintaining a follow-up action under steady state conditions.
  Keywords: braking dynamics; vehicle braking systems; road safety; air brake systems; agricultural trailers; relay emergency valve
  Citation: International Journal of Heavy Vehicle Systems, Vol. 28, No. 2 (2021) pp. 291 - 307
  PubDate: 2021-06-11T23:20:50-05:00
  DOI: 10.1504/IJHVS.2021.115585
  Issue No: Vol. 28, No. 2 (2021)