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We present a cloud-based vehicular data acquisition and analytics system for real-time driver behavior monitoring, trip analysis, and vehicle diagnostic. Our system consists of an On Board Diagnostics (OBD) port to Bluetooth dongle, a mobile app running on a smart phone, and a cloud-based backend. We use a Complex Event Processor (CEP) at both the smart phone and the backend to detect and notify unsafe...
This paper presents the development of a vehicle longitudinal model by studying the dynamics of a ground vehicle dynamic and a powertrain model. The vehicle longitudinal model is an important model to be used in analyzing the performance of a vehicle either in accelerating or braking test in longitudinal direction. In this paper, in order to deal with the variation in the modelling of the vehicle...
The main purpose of this work is to develop a data acquisition platform prototype for automotive telemetry applications such as driving style analysis, fleet management and fault detection. Measurements are gathered from On-Board Diagnostics (OBD) sensors, Global Positioning System (GPS) and an Inertial Measurement Unit. (IMU) logged on the onboard device for remote backup. The data obtained could...
This paper presents results of an unique active absorber system for broad band vibration compensation where the used controller is based on an adaptive feedforward/feedback control scheme. The experimental results show that an enhanced ride comfort can be achieved by eliminating fatigue from low frequency noise and vibrations.
This paper generalizes the pole placement method to the case of improper transfer. In that case, the minimal order solution may be non unique. After some illustrating examples, the problem of active control of a vehicle drivetrain is investigated. The control design is based on a simplified model including a non proper approximation of the delay. A methodic choice of the closed loop poles leads to...
Nowadays a car is controlled by the driver himself, applying gas and brake pedals independently to achieve the appropriate velocity. He is supported by gadgets like anti brake locking system (ABS) and drive slip control (DSC) to keep the vehicle stable and manoeuvrable even in extreme situations e.g. on slippery or icy surface. Sudden torque changes either at the engine or at the brakes make the drive...
In order to minimize the fuel consumption and emissions of a soft hybrid vehicle while maintaining the SOC of the battery in a specified window, an optimising control strategy is required. An optimization developed for this purpose is introduced here. It employs a cost function that is minimized off-line to reduce the calculation power required for its implementation.
The ability to reliably distribute simulations across a distributed system and seamlessly integrate them as a workflow regardless of their level of abstraction is critical to improving the quality of product manufacturing. This paper presents the DIVIDER architecture for managing and maintaining real-time performance simulations integrated through SOAs. The described approach captures features present...
An earthmoving vehicle powertrain is modeled as a MIMO hydrostatic system. Its control inputs include the engine throttle, the electro-hydraulic pump displacement and the flow valve commands. These inputs offer a great control freedom but need to be coordinated. A coordinated MIMO controller for a multi-load powertrain is designed by using an LQG/LTR technique. Modeling and control design are accomplished...
In this paper we propose a complete strategy for the longitudinal control of automotive vehicles in Stop-and-Go situations. Firstly, a upper level grey-box torque control is proposed to compensate for neglected dynamics at chassis level (due for example to road slopes, aerodynamic forces, rolling resistance forces, etc.). Secondly, to obtain the desired torque, we have considered a model-free approach...
This paper deals with an idle speed control design approach that is able to cover the idle operating range at standstill and also during dead start. Thus the common dead start controller becomes dispensable. For this feasibility study a validated nonlinear simulation model of the entire powertrain helps to evaluate the performance of the closed-loop system. Furthermore, experimental results show the...
In this paper, engine braking control by Continuous Variable gear ratio Transmission (CVT) and its design method are proposed. This control enables to follow target vehicle deceleration in stable and good response. First, kinetic equations of vehicle deceleration are shown. Second, control design concept is derived from these equations. Next, the concept is embodied as H-infinity control problem,...
This paper proposes a novel piecewise linear feedback control strategy for the automotive dry clutch engagement process. Based on a dynamic model of the powertrain system, the controller is designed by minimizing a quadratic performance index subject to constraints on the inputs and on the states. The resulting model predictive controller is shown to consist of a piecewise linear feedback control...
In this paper, an experimental evaluation is presented for a Model Predictive Control (MPC) algorithm controlling powertrains dynamics in vehicles with Automated Manual Transmissions (AMTs). This model based control enables online optimization by using sub-optimal solutions directly linked to the accelerator pedal position. Transmission stability constraints are explicitly handled as well as saturations...
Collegiate competitions provide a way for University students to gain a multi-discipline and multi-cultural experience while working on a real-world engineering project. These competitions rely on the natural competitive drive of students to force them to move beyond their comfort bounds to work with individuals from different educational and cultural backgrounds.
In this study, an engine on/off and engine operation control algorithm to improve the fuel economy was proposed for a PHEV(plug-in hybrid electric vehicle) considering driver tendency. To identify the driver tendency, a driver model was developed using VIDE(virtual integrated development environment). The target vehicle model was developed based on MATLAB/Simulink and validation of the vehicle model...
In the development of electrified and other vehicle systems, the modelling and simulation of the vehicle is very important. With these tools the preliminary design, as well as later detailed studies of the systems developed, allow engineers to spend less time on each phase of their projects or address them with an integrated approach. In addition, this integrated approach provides the pos sibility...
Trends in the automotive control systems are toward more comprehensive and electronic control. The objective of this paper is to study the effectiveness of Internal Model Control PID (IMC-PID) method to develop a traction control system based on engine torque control for an automobile. A plant model is developed based on the governing equations and implemented in MATLAB. This is then captured in a...
This paper presents a mixed variable variational algorithm to the optimal atmospheric ascent guidance problem of launch vehicles subject to path constraints and final condition constraints. The optimal three-dimension ascent problem is transformed into a Hamiltonian boundary value problem. And the solving algorithm is a symplectic numerical method based on the dual variational principle, which transforms...
In this study, an integrated powertrain-thermal energy management strategy (IEMS) was proposed for a power-split type plug-in hybrid electric vehicle. Dynamic models of the powertrain components including the engine, motor/generator, power-split transmission and battery were obtained with a thermal management system consisting of an engine (thermal part), radiator, positive temperature coefficient...
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