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Hybrid Electrical Vehicles (HEV) are a very promising approach to save fuel and minimize exhaust emissions. The drivetrains of HEV are equipped with at least one Electric Machine (EM) in addition to the Internal Combustion Engine (ICE). Therefore it is possible to operate the Internal Combustion Engine (ICE) in more efficient working points or to shut it down if the efficiency is too low. Despite...
Transmission is one of the crucial elements of the driveline that affects vehicle fuel economy and comfort. It can transfer power in different combinations of torque and speed. This paper focuses on the modeling, simulation and control of a two-speed transmission for electric vehicles which has seamless gear shifting specification. The transmission incorporates two-stage planetary gear sets and two...
Traction system based on electric driven Continuously Variable Transmission (e-CVT) is widely used in full hybrid powertrains for passenger cars. This paper deals with a new solution for the layout of the e-CVT, which is based on coaxial and concentric arrangement of the electric machines. The hybrid electric transmission based on the e-CVT is proposed for the application on agricultural tractors.
Based on city driving cycles, this study analyzes the load distribution of the wheels-side electric drive (WSED) system for vehicles. The input load and speed are defined based on the output torque of motor, and its load characteristics are analyzed by employing gear counting method. The load distribution is determined by stratified sampling method, which follows a mixed Gaussian distribution. Moreover,...
In recent years, because it has advantages in control accuracy, an electric-powered later torque-vectoring differential has become a hot topic. And the design of mechanism and the characteristics of electric-powered later torque-vectoring differential need farther research. This paper uses the velocity diagram represent all the type of simplest E-TVD which is composed of five elements with two degrees...
To achieve a better riding stability and dynamic characteristic, control strategies for torque allocation are proposed, and then the discussions for the proposed control strategy has conducted. In order to solve the torque optimization question, an objective optimization is proposed. Suitable characterizations of road condition and mechanical structure are used in the strategy to dynamically distribute...
This paper presents a model predictive online optimization scheme for the engine torque control problem. The control-oriented model is based on the intake air charging dynamics and torque generation model which are derived from the mean value model. In order to reduce the tracking error induce by the insufficient accurate predictive model, an embedded integrator about the tracking error is designed...
A technique capable of identifying electric vehicle (EV) mass in real-time has been a topic of research for several years due to the advantages it presents, such as the ability to dramatically improve range estimates, perform more effective torque vectoring for ABS/ESC, track delivery vehicle weight, etc. Some crucial issues in mass identification impede an easy implementation of such an algorithm,...
A method to give a prospect of controller design for a vibration suppression control of driving force of a plug-in hybrid electric vehicle is proposed. This method is applicable to design a controller mathematically and systematically by applying a concept of a reduced order plant model and using a computer algebra system. Furthermore, based on this method, a new concept of vibration suppression control...
This paper presents an Adaptive Predictive Control (APC) for Energy Management in order to improve fuel economy in vehicles equipped with a Dual Power Network. This approach can be applied to hybridised and electrical vehicles and provides a locally optimized solution. This is applied at component-level for the Generator Control and in a state-discretized form for the Energy Management system. A practical...
This paper presents two control laws dedicated to the vehicle control and gives a comparison between them. The first control law is designed to control the vehicle from steering angle and is based on the LPV control strategy, the solution for this problem is achieved using the LMI framework and the interpolation gains method. The second strategy controls the longitudinal and lateral motion of the...
The steer by wire system offer many benefits compare with conventional steering system. By eliminating the mechanical linkage of column shaft between the steering wheel and the front wheel system, it gives more space efficiency, fuel efficiency in term of functionality and at the same time present challenges to the designer. Many researchers have done their control strategy on steer by wire system...
In this paper, a supervisory control of Plug-in Hybrid Electric Vehicles (PHEVs) using hybrid dynamical systems theory is presented. In hybrid dynamical systems, the state trajectories are described by both differential equations and discrete transitions. A PHEV has different operating modes which are modelled in the hybrid dynamical systems framework, simulated and analyzed. Furthermore, a constrained...
In this paper, a coordinated braking control scheme is presented for hybrid duty trucks. A key problem to improve the efficiency of regenerative braking without loss of comfortability is the coordinated operation between the regenerative braking and the mechanical braking torque generated by the electrical motor and the air-over-hydraulic brake, respectively. Furthermore the gear shifting operation...
In this paper, concurrent design of controllers for a vehicle equipped with a parallel hybrid powertrain is studied. Our work focuses on designing the two control algorithms, the energy management and the vehicle stability, concurrently which are traditionally considered separately. Dynamic Programming (DP) technique is used in order to obtain the optimal response trace for the controllers. In energy...
Nowadays many automobile manufacturers are switching to Electric Power Steering (EPS) for its advantages on performance and cost. In this paper, a mathematical model of a column type EPS system is established, and its state-space expression is constructed. Then three different control methods are implemented and performance, robustness and disturbance rejection properties of the EPS control systems...
This paper presents a Linear Quadratic Regulator (LQR) employed to improve performance of an Electric Power Steering (EPS) system. Generally, EPS is a full electric system having an electric motor which provides the assist torque on the steering mechanism in order to reduce the workload and to enhance the steering feel of the driver during steering process. Three main technical areas are described...
The recent decade has witnessed rapid progress in the design and development of autonomous flying robots. The paper closely examines the evolution of modeling and control for such vehicles. Modeling is viewed as an integral part of model-based control synthesis. The first half of the paper is focused on the review of modelling method for unmanned flying robot dynamics. The second half of the paper...
A longitudinal controller for Autonomous Ground Vehicle (AGV) was designed in this paper. Fuzzy algorithm was employed to adjust the three parameters of PID online for reducing model dependence, so as to make the vehicle maintain the desired speed. A switch strategy was designed to coordinate the control of the throttle and brake by calibrating the relationship between the nature deceleration and...
The linear electromotor is a new typed, electric powered steering system, with simple composition and better performance. To satisfy the need of a certain type like this, the designing work of linear electromotor powered steering system has started. The dynamic characteristic of this composition has been thoroughly studied in the environment of MATLAB/ Simulink. The characteristics of assisted power...
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