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This paper aims to present a methodology that helps improving systems modelling by using Process Integration and Design Optimization technologies. Then, the methodology has been applied on an automotive case study: the improvement of the hybrid vehicle TOYOTA PRIUS III modelling. This work has been carried out in the context of the international research program PLACIS (PLAteforme Collaborative d'Ingénierie...
Automated vehicles have drawn great attention in research and industry, due to their potential benefits in driving without passengers. Using computer simulation in motion and speed control of the vehicles can reduce errors and costs. Fuzzy logic provides a different way for issues that need to be controlled. This method is concentrated on what the system should do, not on how the works are done. Using...
Autonomous vehicles can risk dangerous rollover if they corner without taking roll motion into consideration. This paper proposes a control algorithm to follow a curved road while simultaneously preventing rollover. Model predictive control is applied to minimize roll motion throughout cornering. The prediction of vehicle state is based on a four-wheel nonlinear vehicle model with roll dynamics and...
We have developed the robotic vehicle on water that moves by the rider's balance. Previously, due to the lack of stability of the vehicle, balancing skill was required for the rider. In general, the center of buoyancy of the floating body influences on the stability. Therefore, in this paper, the floating vehicle was modeled and the appropriate body shape and size that improves the stability was simulated...
In this study, implementation of design and simulation programme of a solar energy (photovoltaic panel) supported hybrid electric vehicle was designed, which is considered to be widely used in the 21st century. In the study, DC motor was simulated for a serial hybrid electric vehicle in ICE-generator and photovoltaic panel matlab/simulink environment. Moreover, a .m file was written by calculating...
The friction coefficient identification of dry clutch is a precondition for precise model-based dry clutch control. Recursive Least Square with forgetting factors is adopted to identify the friction coefficient of dry clutch during vehicle starting-up process. Because the accuracy of the engine damp coefficient affects friction coefficient identification of the clutch, it is necessary to identify...
Effects of different design parameters on the performance of a hybrid city bus were studied. A system simulation model of the hybrid city bus was developed and used for studying the effects of drive motor torque and vehicle mass on vehicle performance, fuel consumption and stability during regenerative braking. Increasing the maximum torque by 60 % from the nominal value was found to improve the fuel...
Dynamic modeling and simulation of remotely-operated vehicle (ROV) are essential for search and rescue mission using AUV in remote distance. For initial model, hydrodynamic coefficients used in the ROV dynamic model are estimated using computation and analytical methods. The control strategy from launch to recovery is simulated using MATLABTM and SimulinkTM software. A three-dimension animation for...
The driving range of electric vehicles can be extended using regenerative braking. Regenerative braking uses the electric drive system, and therefore only the driven wheels, for decelerating the vehicle. Braking on one axle affects the stability of the vehicle, especially for road conditions with reduced friction. This paper discusses three control strategies for preventing loss of stability while...
This study aims at evaluation of crashworthiness of rhombus concept car by comparing the response of related parameters in different collision conditions. For this objective the numerical method was used to simulate the dynamic responses of the rhombus concept car in frontal and small overlap collisions. The dynamic response parameters was analyzed and discussed in terms of the invasion quantity of...
In the past decade, research into insect-inspired flapping-wing micro-aerial vehicles (FWMAV) has grown steadily, toward addressing unique challenges in morphological construction, force production, and control strategy. Remarkable results have emerged from work focused on generation of adequate lift force for levitation and vertical acceleration [1]; however, effective methods for motion control...
This paper is concerned with the control of a hovercraft vessel using a fuzzy variable structure control theory. Firstly, we introduce the R/C hovercraft type vessel dynamics. Secondly, the fuzzy variable structure control (FVSC) is proposed in this paper. A significant feature is that the transient response during the reaching phase has been remarkably improved by the proposed control. To illustrate...
Aiming at characteristics of regenerative brake of hybrid electric drive system of tracked armored vehicle, mechanism of regenerative brake by pulse width modulation is in-depth analyzed, motor speed, brake current, feedback current, feedback energy and feedback energy efficiency of maximum feedback efficiency regenerative brake, maximum feedback power regenerative brake and constant moment regenerative...
This paper is concerned with the control of a hovercraft vessel using a sliding mode fuzzy logic control and image-guided techniques. Firstly, we introduce the R/C hovercraft type vessel dynamics. Secondly, the sliding mode fuzzy logic control (SMFLC) is proposed in this paper. A significant feature is that the transient response during the reaching phase has been remarkably improved by the proposed...
Aiming at demand that hybrid electric drive system should brake safely and recover energy at most at the same time, optimized electric-machine combination brake control strategy based on brake strength is proposed in this thesis to solve contradiction between maximum feedback energy, fast braking and safe. Simulation results for typical braking condition show that the vehicle can brake steadily and...
In this paper a conceptual detachable freight cab is designed to improve competitive capability of railway freight transportation by the formation of push-pull trains. The cab module is attached to the freight wagon with a beam fixed into the draw gear position after removal of the coupler, which is relocated at the front of cab module. Two side anti-climber buffers are fixed in the front of cab....
In order to solve the problem of predicting damping characteristic of the shock absorber in the stage of design, a mathematical model for the shock absorber was built and simulated using the software Easy5. The establishment of the model was based on the analysis of internal configuration and working principle of double-tube hydraulic shock absorber, then using the parameters described the internal...
The Occupant Protection of Vehicle Side Impact (GB20071-2006) is a compulsive and executable standard that all M1 and N1 style vehicle must obey to. Simulation for vehicle side impact is one of important test methods to study vehicle impact safety. And the model of moving deformable barrier (MDB) is the basic tool of the test. According to the requirements in regulation for the performance and test...
The railway braking system is a complex pneumatic plant whose performance and reliability are related to safety, because of the uncertainly of adhesion coefficient between rail and wheelset. The wheelset may slide while revolving, especially at high speed. Therefore anti-sliding control system is necessary and useful to protect wheel. The problem is how to find the suitable parameter of anti-sliding...
A dynamic model of four degree-of-freedom four-wheel-steering vehicle is built. By using differential equations of motion of free rigid body, the steering and braking situation is considered and simulated. The results show that this model is close to the steering and braking situation.
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