Papers by Keyword: Tracked Vehicle

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Authors: Mehmet Nuri Özdemir, Varlık Kılıç
Abstract: A 3 DOF lumped mass tracked vehicle model was constructed in Matlab Simulink Environment and used for positioning the vehicle on gradients and missile firing operations. Pitch center, roll center and system parameters such as equivalent stiffness values, equivalent damping values and equivalent mass/inertias of 3 DOF model were obtained from 32+ degrees of freedom tracked vehicle model by simulations. Moments in pitch and roll directions were applied to the vehicle to find the pitch and roll centers. A range of step forces in bounce direction and a range of step moments in pitch and roll directions were applied to the vehicle and responses in the related directions of 32+ degrees of freedom model were used to determine the system parameters of 3-DOF model. Finally attitude of the vehicle on the gradients and missile firing scenario were simulated with both models and the results showed that 3 DOF model reasonably predicts the behavior of the tracked vehicle.
Authors: Tan Jung Low, Suet Peng Yong, Choon Leong Ung, Chan Weng Leong
Abstract: This paper discussed the possibility of deploying the proposed Variable Geometry Tracked Vehicle (VGTV) in our first robotic based prototype called REC-01. REC-01 is being developed as a miniature scouting and search & rescue all-terrain robotic vehicle. Its comparatively small size and mass limit its power capacity and navigational capabilities for larger obstacles. The VGTV is a unique concept used to overcome these shortcomings. The main part of this paper is to discuss the mechanical efficiency of the tracked systems in some specific field conditions and compare the results with the conventional tracked propulsion. The outcomes of the first prototype are also briefly discussed in this paper.
Authors: Long Bo Sheng, Ji Sheng Ma, He Yang Sun, Shou Qiang Guan, Wei Zhao
Abstract: A certain new type of tracked vehicle has exposed the problem of insufficient braking force. Especially when tracked vehicle climbing the ramp, insufficient braking force is very harmful .The brake problem to a large extent affect the driving and mobility performance of the tracked vehicle .In this paper, using Pro/Engineer software to create braking system of a tracked vehicle mechanical linkage virtual prototype. And through the mech/pro interfaces the virtual prototype into ADAMS and is put up for dynamic analysis. On the basis of the kinematic analysis of the mechanical linkage, the link length of mechanical linkage was optimized to improve the braking force and obtain better optimization results.
Authors: Hong Yan Wang, Tong Fei Li, Tao Wang, Qiang Rui, Jiang Tao Gai, Guang Ming Zhou, Yi Yuan
Abstract: This paper presents systematic calculation about steering loads, taking both the tracks slip and track-width into account. We can deduce propelling force, braking force and steering resistance torque in an algorithmic model on the assumption of uniform pressure distribution and concentrated ground-contact-load distribution in steering process. The result shows that, propelling force, braking force and steering resistance torque can be computed on a simple model of considered tracks' slip and disregarded track-width when track-width is considered. Propelling force and brake force lean to the bodys longitudinal geometrical centerline, while offsets can be ignored relative to track-width.
Authors: Bing Chen, Zheng Tian, Zhong Jun Yin
Abstract: This paper established a high-speed tracked vehicle dynamics model, and simulated the transient response of sprocket when the vehicle is running at 60km/h on the D class road. the finite element model of the single tooth in mesh is established in Ansys and the rigid-flexible coupling model of "trackboard- sprocket" is established in RecurDyn. The dynamic stress and strain fringe of the sprocket’s gear ring is achieved by analysis. Simulation results show that the stress of tracked vehicle sprocket gear root and the fixed gear bolt hole is larger, and the stress concentration is detected at the edge of contacted tooth. The simulation results provide the calculation basis for the optimization of the high-speed tracked vehicle system and its lifespan prediction.
Authors: Yi Cheng Xu, Feng Li Cao, Guo Zhang Li, Jing Tao Zhou
Abstract: According to the dynamic characteristics of tracked vehicle gearbox system, the integrated influence of elasticity of shaft, gear meshing stiffness and transmission error in the system is considered, and mathematics models of two type configurations are created, Matlab/Simulink model of which are provided. The torsional vibration dynamic model of transmission system with tracked vehicle gearbox is developed and the vibration equation of the system is established. The influences of the transmission errors, moment of inertia, mesh phase and torsion stiffness are investigated respectively. It has important realistic meaning for guiding the gearbox structural design and improving, reducing its fault rate.
Authors: Yong Feng Zhang, Ren Bin Zhou, Jie Min Yang, Zheng Zhang
Abstract: In order to diagnose the fault, the fault of the unnormal automatic shift function of tracked vehicle is diagnosed by the FTA-FMEA method, according to the step of determine the top event, FTA(Fault Tree Analysis) qualitative analysis, self-checking and self-repairing by the user unit, FMEA(Failure Mode and Effects Analysis) analysis and locate the fault. The conclusion of the study can be conveniently guiding self-repairing by the user unit or repairing by the next higher level repair unit. Practice has proved, this method is simple and feasible, with high accuracy, has very important significance to guide the tracked vehicle repair.
Authors: Zhong Si Xu, Tie Xiong Su, Gang Li, Kai Wang
Abstract: Because traditional passive suspension system can’t meet with the requirement of ride in all kinds of roads, elastomer damper was designed and installed on the limiting stopper of the suspension system. Two degrees of freedom model of suspension system with elastomer damper was built and its dynamics simulation was done by use of the software Recurdyn. The simulation results show that the application of elastomer damper can improve the ride of tracked vehicle; the striking force apparently decreases when suspension system has broken down and the probability of suspension system breakdown has been obviously reduced, all of which illustrates the elastomer damper has an obvious dampening effect on the tracked vehicle. Keywords: elastomer damper, tracked vehicle, suspension system, dynamics simulation
Authors: Tomasz Nabagło, Andrzej Jurkiewicz, Marcin Apostoł, Piotr Micek
Abstract: We present information about construction tasks of tracked vehicle model in MSC.ADAMS computer program. Kinematic and dynamic relationships inside entire suspension system are described here. Elements of the vehicle are grouped in few subsystems, like suspension, wheels or tracks. The significant accent is put on the tracks with its force connections. Those connections are between all track links as also between wheels, links and ground surface. Also significant accent are put on damping value estimation. It is estimated based on tolerance area of characteristics of real damper element, which is applied in this type of vehicles. In next part of the article, process of appropriate damping characteristics selection is described. This process is applied for high fidelity model building.
Authors: Xiao Dong Gao, Liang Gu, Ji Fu Guan, Jun Feng Gao
Abstract: In-arm hydro-pneumatic suspension unit (ISU) is a kind of hydro-pneumatic suspension, it has been researched for 30 years. Nowadays, there are three companies in mass production of ISU. In this paper, the growth and ISU products of these companies are introduced, the main characteristics of ISU are discussed, and the main application of the hydro-pneumatic suspensions are presented.
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