scholarly journals Analysis of a Unibody Stub Axle-Hub Design for an ATV

2021 ◽  
Author(s):  
Urooj Ahmad ◽  
Subhrat Praharaj
Keyword(s):  
Dynamic Performance ◽  
Material Design ◽  
Vehicle Performance ◽  
Ground Vehicle ◽  
Dynamics And Control ◽  
Suspension Geometry ◽  
The Cost ◽  
And Control ◽  
Control Behaviour ◽  
Selection Of

This paper aims to design and model a unibody hub and stub axle Wheel assembly to withstand rough terrain conditions while adhering to design optimization objectives of weight, costs, and manufacturability. For any ground vehicle, its dynamics and control behaviour are majorly governed by the design of its wheel assembly since it experiences all the major loads an ATV faces. We aimed to design and fabricate a unibody hub and stub axle that is lightweight and more durable in comparison to the present form of design in which the hub and stub axle is manufactured and assembled separately. The advantages of this unibody design are lesser components, easy replacement, and easy manufacturing. This report also considers the simulation of this unibody using FEM through Ansys, considering all the loads acting on the unibody. Also, the cost and strength comparison of different materials is done for the selection of the best material. Design is done in such a way to consider all the parameters such as performance, reliability, manufacturability, serviceability, weight, and cost. The model achieves a significant reduction in unsprung mass, improving the dynamic performance of the ATV, without requiring a change in suspension geometry. We also analyze the improvement in vehicle performance in shifting from the classic independent stub through hub design to this integrated unibody design.

scholarly journals A Simplified Model Predictive Control for T-Type Inverter with Output LC Filter

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 31 ◽  
Author(s):  
Van-Quang-Binh Ngo ◽  
Minh-Khai Nguyen ◽  
Tan-Tai Tran ◽  
Young-Cheol Lim ◽  
Joon-Ho Choi
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Performance Simulation ◽  
Control Scheme ◽  
Finite Control ◽  
Lc Filter ◽  
The Cost ◽  
And Control ◽  
Measurement And Control ◽  
Selection Of

In this paper, a model predictive control scheme for the T-type inverter with an output LC filter is presented. A simplified dynamics model is proposed to reduce the number of the measurement and control variables, resulting in a decrease in the cost and complexity of the system. Furthermore, the main contribution of the paper is the approach to evaluate the cost function. By employing the selection of sector information distribution in the reference inverter voltage and capacitor voltage balancing, the execution time of the proposed algorithm is significantly reduced by 36% compared with conventional model predictive control without too much impact on control performance. Simulation and experimental results are studied and compared with conventional finite control set model predictive control to validate the effectiveness of the proposed method.

scholarly journals Dynamics and control for multi-agent networked systems: A finite-difference approach

2019 ◽  
Vol 29 (04) ◽  
pp. 755-790 ◽  
Author(s):  
Umberto Biccari ◽  
Dongnam Ko ◽  
Enrique Zuazua
Keyword(s):  
Parabolic Equations ◽  
Transport Model ◽  
Large Population ◽  
Mean Field ◽  
Mean Field Limit ◽  
Dynamics And Control ◽  
Multi Agent ◽  
Nonlocal Transport ◽  
The Cost ◽  
And Control

We analyze the dynamics of multi-agent collective behavior models and its control theoretical properties. We first derive a large population limit to parabolic diffusive equations. We also show that the nonlocal transport equations commonly derived as the mean-field limit, are subordinated to the first one. In other words, the solution of the nonlocal transport model can be obtained by a suitable averaging of the diffusive one. We then address the control problem in the linear setting, linking the multi-agent model with the spatial semi-discretization of parabolic equations. This allows us to use the existing techniques for parabolic control problems in the present setting and derive explicit estimates on the cost of controlling these systems as the number of agents tends to infinity. We obtain precise estimates on the time of control and the size of the controls needed to drive the system to consensus, depending on the size of the population considered. Our approach, inspired on the existing results for parabolic equations, possibly of fractional type, and in several space dimensions, shows that the formation of consensus may be understood in terms of the underlying diffusion process described by the heat semi-group. In this way, we are able to give precise estimates on the cost of controllability for these systems as the number of agents increases, both in what concerns the needed control time horizon and the size of the controls.

Selection of Heat Treat Process for Optimum Gear Design

2000 ◽  
pp. 185-188
Keyword(s):  
Material Selection ◽  
Material Design ◽  
Heat Treating ◽  
Gear Design ◽  
Successful Design ◽  
Design Requirements ◽  
The Cost ◽  
Design And Manufacture ◽  
Cost Factors ◽  
Selection Of

Abstract The successful design and manufacture of gears are influenced largely by design requirements, material selection, and proper heat treatment. This chapter addresses the cost factors and tradeoffs involved in selecting a material, design features, and a heat treating process to optimize gear performance for a particular application.

A Theoretical Study of the Internal Forces in a Hydraulic Vane Pump with Hypertrochoid Curve in the Inner Surface of its Stator

2012 ◽  
Vol 463-464 ◽  
pp. 301-304 ◽  
Author(s):  
M. Ebrahimi ◽  
S.A. Jazayeri
Keyword(s):  
Inertia Force ◽  
Fluid Viscosity ◽  
Vane Pump ◽  
Pump Design ◽  
Inner Surface ◽  
Dynamics And Control ◽  
Internal Forces ◽  
Line Pressure ◽  
And Control ◽  
Selection Of

In the latest our works, Performance of a fixed displacement- hydraulic balance vane pump, theoretically and practically was studied by application of the basic hypertrochoid curve in the inner surface of its stator. Also the effect of the inertia force of the vanes on the performance of the pump with this curve was studied. This study presents a theoretical analysis of the internal pressure distribution in the pump, and of the resulting forces and torques applied to its components. This analysis is essential to the study of the pump dynamics and control, the pump design, and selection of the pump bearings. These forces are shown to be a function of the line pressure, the shaft rotational speed, the fluid bulk modulus, the fluid viscosity, and the design geometry. These forces are composed of two components: a continuous component due to the exposure of chambers to the line port, and an intermittent component due to a hydraulic lock phenomenon.

Tennis Transmitter Design and Parameter Optimization

2013 ◽  
Vol 401-403 ◽  
pp. 304-307
Author(s):  
Xiang Hui Gong
Keyword(s):  
Material Design ◽  
Structure Design ◽  
Design Parameters ◽  
Connecting Rod ◽  
Design Choice ◽  
Round Ball ◽  
Transmitter Design ◽  
And Control ◽  
Motor Sports ◽  
Selection Of

Design of tennis transmitter design parameters, structure design, choice of institution, etc., the transmitter in accordance with the standards of the international tennis federation (ITF) to carry on the design. Design and institutional selection includes the realization of the crank connecting rod mechanism and control motor sports, ball tray and ball under the control of the speed of tennis, crowded ball wheel speed regulating motor selection, crowded round ball structure design and checking calculation, the design and checking calculation of shaft, casing and bracket material design and the selection, selection of walking wheel, etc.

Editorial Dynamics and Control of Aerospace and Vertical Transportation Systems

2014 ◽  
Vol 706 ◽  
pp. 1-5
Author(s):  
José M. Balthazar ◽  
Paulo Batista Gonçalves ◽  
Stefan Kaczmarczyk ◽  
André Fenili ◽  
Marcos Silveira ◽  
...  
Keyword(s):  
Nonlinear Dynamics ◽  
Transportation Systems ◽  
Special Issue ◽  
Science And Engineering ◽  
International Conference ◽  
Dynamics And Control ◽  
Vibration Problems ◽  
And Control ◽  
New Strategies ◽  
Selection Of

This Special Issue presents a selection of papers initially presented at the 11th International Conference on Vibration Problems (ICOVP-2013), held from 9 to 12 September 2013 in Lisbon, Portugal. The main topics of this Special Issue are linear and, mainly, nonlinear dynamics, chaos and control of systems and structures and their applications in different field of science and engineering. According to the goal of the Special Issue, the selected contributions are divided into three major parts: “Vibration Problems in Vertical Transportation Systems”, “Nonlinear Dynamics, Chaos and Control of Elastic Structures” and “New Strategies and Challenges for Aerospace and Ocean Structures Dynamics and Control”.

A Web Based “Virtual Racing Car Championship” to Teach Vehicle Dynamics and Multidisciplinary Design

2011 ◽  
Author(s):  
Francesco Biral ◽  
Fabrizio Zendri ◽  
Enrico Bertolazzi ◽  
Paolo Bosetti ◽  
Marco Galvani ◽  
...  
Keyword(s):  
Optimal Control ◽  
Dynamic Model ◽  
Vehicle Dynamics ◽  
Multidisciplinary Approach ◽  
Dynamic Performance ◽  
Pole Position ◽  
Multidisciplinary Design ◽  
Web Based ◽  
Dynamics And Control ◽  
And Control

A web based VRCC (Virtual Racing Car Championship) application is here presented. The application is intended for educational purposes to teach students a variety of topics of the teaching course “Vehicle Dynamics and Control” in Mechatronics Master Degree Course; the present application forces students to understand the relevant parameters that govern the dynamic performance of racing cars. The application relies on an optimal control library, which is capable of calculating minimum lap times of a racing car on the basis of a comprehensive symbolic description of an open-wheel racing car dynamic model. Students are enrolled in a number of teams competing in a Championship to attain the minimum lap time (i.e., the pole position) on three circuits by choosing the appropriate setup of the racing car. The ranking is based on the best lap time obtained in the qualification session. The application stimulates students to adopt a multidisciplinary approach in a challenging and instructive environment, where they are in a position to apply a broad range of knowledges and abilities they have acquired during the Mechanotronics engineering course.

scholarly journals Rendezvous in Cis-Lunar Space near Rectilinear Halo Orbit: Dynamics and Control Issues

Aerospace ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 68
Author(s):  
Giordana Bucchioni ◽  
Mario Innocenti
Keyword(s):  
Body Motion ◽  
Stable And Unstable Manifolds ◽  
Actuator Dynamics ◽  
Guidance And Control ◽  
Dynamics And Control ◽  
Critical Phases ◽  
Three Body ◽  
And Control ◽  
In Cis ◽  
Selection Of

The paper presents the development of a fully-safe, automatic rendezvous strategy between a passive vehicle and an active one orbiting around the Earth–Moon L2 Lagrangian point. This is one of the critical phases of future missions to permanently return to the Moon, which are of interest to the majority of space organizations. The first step in the study is the derivation of a suitable full 6-DOF relative motion model in the Local Vertical Local Horizontal reference frame, most suitable for the design of the guidance. The main dynamic model is approximated using both the elliptic and circular three-body motion, due to the contribution of Earth and Moon gravity. A rather detailed set of sensors and actuator dynamics was also implemented in order to ensure the reliability of the guidance algorithms. The selection of guidance and control is presented, and evaluated using a sample scenario as described by ESA’s HERACLES program. The safety, in particular the passive safety, concept is introduced and different techniques to guarantee it are discussed that exploit the ideas of stable and unstable manifolds to intrinsically guarantee some properties at each hold-point, in which the rendezvous trajectory is divided. Finally, the rendezvous dynamics are validated using available Ephemeris models in order to verify the validity of the results and their limitations for future more detailed design.

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