scholarly journals Comparing the physical principles of action of suspension damping devices based on their influence on the mobility of wheeled vehicles

2021 ◽  
Vol 4 (5(112)) ◽  
pp. 51-60
Author(s):  
Vladislav Dushchenko ◽  
Serhii Vorontsov ◽  
Vyacheslav Masliyev ◽  
Oleg Agapov ◽  
Roman Nanivskyi ◽  
...  
Keyword(s):  
Hydraulic Shock ◽  
Relative Movement ◽  
Shock Absorbers ◽  
Energy Recuperation ◽  
Wheeled Vehicle ◽  
Working Bodies ◽  
Wheeled Vehicles ◽  
Resistance Forces ◽  
Physical Principles ◽  
Main Factor

This paper reports the comparison of two physical principles of action of suspension damping devices based on their influence on the mobility indicators for an 8×8 wheeled machine. A radical difference between these principles of action is the dependence of resistance forces on the speed of the relative movement of working bodies (internal friction: hydraulic shock absorbers) or on the relative movement of working bodies (external friction: friction shock absorbers). Widespread hydraulic shock absorbers have certain disadvantages that do not make it possible to further increase the mobility of wheeled or tracked vehicles without the use of control and recuperation systems. In turn, in friction shock absorbers, the use of new materials has eliminated many of their shortcomings and thus can provide significant advantages. It was established that the application of friction shock absorbers for a given wheeled vehicle did not significantly affect the speed compared to hydraulic ones. The main factor that prevented the implementation of the advantages of friction shock absorbers was the insufficient suspension travel. However, friction shock absorbers absorbed 1.76...2.3 times less power, which reduced the load on nodes and increased efficiency (autonomy). In addition, a more uniform load on suspensions was ensured, which improved their resource, and, due to the prevailing vertical oscillations of the suspended body over the longitudinal-angular ones, the geometric passability improved as well. The comparison of two physical principles of action of damper suspension devices in a wheeled vehicle has shown that the use of friction shock absorbers could provide significant advantages in resolving the task relates to improving the mobility and would fundamentally affect the choice of the suspension energy recuperation system if it is applied.

Methodology for determining losses in the transmission of two-axle wheeled vehicles

2020 ◽  
pp. 22-28
Author(s):  
D.H. Valeev ◽  
I.F. Gumerov ◽  
V.S. Karabtsev
Keyword(s):  
Resistance Force ◽  
Dimension Theory ◽  
Transmission Losses ◽  
Wheeled Vehicle ◽  
Motion Resistance ◽  
Left And Right ◽  
Gear Wheels ◽  
Wheeled Vehicles ◽  
Physical Quantities ◽  
Resistance Forces

Based on the analysis of studies on determination the resistance force in the transmission of a two-axle wheeled vehicle, it was established that the developed methods and the results obtained with their help are not entirely correct: the dimension of the left and right parts of the expressions is violated in the formulas of some researchers; when using the method for determining the driveout of a vehicle’s transmission, it is not taken into account that the driving and driven gear wheels of the main gear in this case do not interact in the same way as when they rotate in traction mode. To eliminate these shortcomings, a formula is proposed, obtained using the dimension theory for physical quantities, and an improved methodology for determining the indicated resistance force is developed. Keywords wheeled vehicle, transmission, losses, efficiency, fuel consumption, motion resistance forces, bench, chassis. [email protected]

Effectiveness of the running system of a wheeled vehicle

2020 ◽  
pp. 16-22
Author(s):  
D.A. Dubovik
Keyword(s):  
Steering Wheel ◽  
Steering Control ◽  
Control Effectiveness ◽  
Power Drive ◽  
Running System ◽  
Wheeled Vehicle ◽  
Curvilinear Motion ◽  
Wheeled Vehicles ◽  
System Power ◽  
Effectiveness Coefficient

A method for quantitative assessment of the effectiveness of the running system of wheeled vehicles for the general case of curvilinear motion is proposed. An expression is obtained for calculating the coefficient of efficiency of the running system of a wheeled vehicle, taking into account the parameters of the power and steering wheel drives. The results of evaluating the effectiveness of the running system of an off-road vehicle with a wheel arrangement of 8Ѕ8 and two front steerable axles are presented. Keywords: wheeled vehicle, running system, power drive, drive wheels, steering control, effectiveness, coefficient of efficiency. [email protected]

Condition indicating device for wheeled vehicle shock absorbers

1982 ◽  
Vol 72 (6) ◽  
pp. 2055-2055
Author(s):  
Brajnandan Sinha ◽  
Sven‐Erik Tiberg
Keyword(s):  
Shock Absorbers ◽  
Wheeled Vehicle

scholarly journals Design of a Human-Powered Roll Stabilization Attachment for Utilitarian Two-Wheeled Vehicles

2019 ◽  
Author(s):  
Guillermo F. Diaz Lankenau ◽  
Lea Daigle ◽  
Samuel H. Ihns ◽  
Eric Koch ◽  
Jana Saadi ◽  
...  
Keyword(s):  
Front Axle ◽  
Asia Pacific ◽  
Eastern Asia ◽  
Suspension Systems ◽  
Wheeled Vehicle ◽  
Roll Stabilization ◽  
Three Degree Of Freedom ◽  
Human Powered ◽  
Wheeled Vehicles ◽  
Growing Crop

Abstract This paper describes the motivation and development of a human-powered roll stabilization attachment for utilitarian two-wheeled vehicles. The proposed design has been built and tested by the authors in both on- and off-road conditions. It provides balance by providing a rolling platform underneath the two-wheeled vehicle (motorcycle) for the user to push against with their feet. This platform is placed under the driver’s sitting position and is towed from a three degree-of-freedom joint behind the front axle (i.e. one of the implementations uses a ball hitch joint). Fifty eight percent of the world’s motorcycles are in Asia Pacific, and Southern and Eastern Asia. In most of those countries, motorcycles greatly outnumber cars and many of these motorcycles function as utility vehicles. The uses of motorcycles include transportation of goods on the bike frame, transportation of goods on a trailer, and even pulling agricultural implements in farms. If no modifications are made to the motorcycle, at slow speeds operators of motorcycles must drag their feet on the ground and lightly push upwards as needed to retain balance. Attaching conventional outrigger wheels, similar to a motorcycle side-car, can negate some of the advantages of motorcycles that users value by: (A) preventing leaning into turns when rigid outriggers arms are used, (B) significantly increasing complexity and mass when outrigger arms mounted on suspension systems are used, and (C) increasing the vehicle’s width such that it can no longer travel between car lanes or between rows of growing crop. An additional design consideration for balancing motorcycles is the user’s need for quick conversion between a statically balanced vehicle and a vehicle can lean dynamically in turns, for example for someone who wishes to operate a motorcycle on farms but also travel quickly between agricultural fields. This conversion convenience is affected not only by the ease of attaching and detaching the balancing system but also by the ability to comfortably carry on the balancing system on the motorcycle even when it is not being used, such that it can be deployed when it is needed. This paper describes a design for a human-powered roll stabilization attachment that address these concerns and other identified user needs. It also provides with general equations to design similar human-powered roll stabilization systems for motorcycles.

A Review of Anti-Lock Braking System Configuration for Two-Wheeled Vehicle

2015 ◽  
Author(s):  
Liangyao Yu ◽  
Shuhao Huo ◽  
Xiaohui Liu ◽  
Xiaoxue Liu
Keyword(s):  
State Of The Art ◽  
The State ◽  
Additional Cost ◽  
System Configuration ◽  
Passenger Cars ◽  
Braking System ◽  
Wheeled Vehicle ◽  
Electric Scooter ◽  
Wheeled Vehicles ◽  
Electric Bike

Anti-Lock Braking Systems (ABS) have been developed and integrated into vehicles since it is invented more than thirty years ago. However, most of nowadays ABS are designed for multi-wheeled passenger cars, commercial cars and trucks. Due to the technical complexity and additional cost, ABS is not as common on two-wheeled vehicles, such as motorcycle, electric scooter, electric bike, etc. Study shows that injuries and deaths in relation to two-wheeled vehicles with ABS are significantly decreased. This paper is to provide a brief review of the state-of-the-art on the ABS configuration of two-wheeled vehicles.

PWM Control Accuracy for Scratch Drive Actuators

2010 ◽  
Author(s):  
Jenelle Armstrong Piepmeier ◽  
Samara L. Firebaugh
Keyword(s):  
Open Loop ◽  
Open Loop Control ◽  
Forward Motion ◽  
Loop Control ◽  
Wheeled Vehicle ◽  
Straight Line ◽  
Fixed Radius ◽  
Turning Radius ◽  
Wheeled Vehicles ◽  
Control Accuracy

In this paper we investigate the problem of controlling a scratch drive actuator that has two discrete modes of locomotion: forward motion in a straight line, and forward motion with fixed radius curvature. This type of device can be modeled as a two-wheeled vehicle (with the previously stated constraints). By alternating between these two modes of operation, the device can move along a variable-radius curved path. In practice, the robots do not move in a purely straight manner. This paper seeks to quantify the accuracy that can be achieved by switching between the two modes of locomotion. This type of low-level open-loop control facilitates the use of a higher level feedback controller designed for two-wheeled vehicles with a variable turning radius.

Propulsion Dynamic Requirements Analysis for Multi-Axle Skid-Steer Wheeled Vehicles

2020 ◽  
Author(s):  
Mostafa Yacoub ◽  
Ahmed Ali
Keyword(s):  
Experimental Validation ◽  
Worst Case ◽  
Wheeled Vehicle ◽  
Wheel Drive ◽  
System Requirements ◽  
Turning Radius ◽  
Four Wheel Drive ◽  
Driving Torque ◽  
Wheeled Vehicles ◽  
Selection Of

Abstract Multi-axle skid-steer wheeled vehicles have the advantages of simplicity and enhanced traction. That’s why they are used in off-road environments and also in mobile robots. In the present work, a dynamic analysis of the propulsion system requirements for multi-axle wheeled vehicles is investigated. As the multi-axle wheeled vehicle differentially steers at a smaller turning radius, the driving torque requirements approach their peak. The adhesion at each tire of the multi-axle vehicle and its relation to the contact patches are analyzed. The analysis presented starts with four wheel drive, six wheel drive and eight wheel drive vehicles, then it is widened to n-wheel drive vehicles. A generic formula for obtaining the propulsion torque requirements for multi-axle skid-steer wheeled vehicles is presented. The analysis is extended to include experimental validation of the obtained analytical results. The experimental work includes three small electrically driven skid-steer vehicles; four wheel drive vehicle, six wheel drive vehicle and eight wheel drive vehicle. The selection of the drive motors for each of those vehicles was based on the proposed formula. Each of the three vehicles was tested in the worst case adhesion torque requirement. The experimental results showed that the proposed formula is capable, to a great extent, to predict the torque requirements for the multi-axle skid-steer wheeled vehicles in the design phase.

High-frequency Characterization of Hydraulic Shock Absorbers

ATZ worldwide ◽  
2019 ◽  
Vol 121 (3) ◽  
pp. 76-80
Author(s):  
Sebastian Rieß ◽  
Jan Hansmann ◽  
William Kaal ◽  
Sven Herold
Keyword(s):  
High Frequency ◽  
Hydraulic Shock ◽  
Shock Absorbers

Acceleration-Based Remaining Life Prognostics for Terrain-Loaded Components on an Army Ground Vehicle System

2009 ◽  
Vol 52 (2) ◽  
pp. 40-49 ◽  
Author(s):  
Richard Heine ◽  
Donald Barker
Keyword(s):  
Department Of Defense ◽  
Remaining Life ◽  
Ground Vehicle ◽  
Wheeled Vehicle ◽  
Vehicle System ◽  
Acceleration Sensors ◽  
And Performance ◽  
Critical Components ◽  
The Military ◽  
Wheeled Vehicles

Use of a health and usage monitoring system (HUMS) is one method the Department of Defense is investigating to meet conflicting cost and performance goals for Army wheeled vehicles. One area where a HUMS would be of great benefit is monitoring critical components vulnerable to terrain-induced fatigue. While strain is typically the desired input to a fatigue model, acceleration sensors are less susceptible to damage from the military ground vehicle environment and provide more reliable data over long periods of usage. The feasibility of using vibratory inputs from an accelerometer to make component fatigue predictions for a military wheeled vehicle system is explored in this study, and the use of limited subsets of data for algorithm training are evaluated. An example component is used to demonstrate that the proposed HUMS algorithms are appropriate and provide suitably accurate fatigue predictions.

Sign in / Sign up

Export Citation Format

Share Document