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A study of signal control effects on vehicle's emissions through a sequence of traffic lights was conducted. To describe the states of traffic lights, a signal state function was proposed. Meanwhile, a modified car-following model was developed and applied to show the traffic behaviors at signalized intersections on a roadway. The moving behavior of vehicle was discussed in three modes: free running...
Designing the controller for active suspension system is the topic of great interest among the control engineers since long to provide the ride comfort to the passengers under the rough and uneven road surface. In this paper, a super twisting control algorithm of second order sliding mode controller is designed and implemented on the quarter car system. The super twisting algorithm attenuates the...
This article presents the design and construction of a mechanism for emulating load forces caused by the road conditions and friction over an electric power assisted steering (EPAS). This mechanism uses extension springs and a rack-and-pinion mechanism to emulate these load forces. The purpose of devising this mechanism is to build an EPAS system test bench, that allows observing and testing the operation...
Teaching mathematics for engineering students is very important. New undergraduate students are aware that they will need mathematical concepts in professional activities. It is still usual to observe not only the difficulty of students in mathematical disciplines, but also the lack of motivation for those disciplines. Motivate and keep motivated the engineering students to mathematical disciplines...
A measurement model for quantifying the intangible value of enterprise carbon management is proposed and established in this paper. We devise and formulate embedded management strategies of the assets for automobile enterprises, and develop a software agent-based system for simulating the evolution of the assets of automobile enterprises under three different scenarios. The results show that our measurement-based...
In this paper, a vehicle adaptive cruise control (ACC) hardware in-the-loop (HIL) platform is established to test different control strategies. This platform consists of the longitudinal vehicle dynamic model established in LabVIEW and the controller designed by the field-programmable gate array (FPGA). Due to the complex control algorithm of ACC system, FPGA with the ability of high-speed calculation...
Traffic jam has caused serious environmental pollution problem to our daily life nowadays. To make clear the effects of different traffic flow drivers' type influence on traffic carbon-dioxide(i.e. CO2) emission, we first modified the traditional coupled-mapping traffic flow car following model, that the driver's sensitivity factor obeys mathematic statistical probability distribution, and deduced...
Developing a driving cycle in according with the actual road conditions is instrumental for the matching of power system design, fuel economy and emissions assessment. This paper used GPS to collect the actual operation of taxi in Harbin urban and divided into four model events: acceleration, deceleration, cruising and idle. The model events with similar mean of velocity and average acceleration are...
This paper proposes an ejector refrigeration system driven by automobile exhaust waste heat. As the waste heat varies with operating conditions, maintaining the performance of this system is a challenging task. This work focuses on the design of a model predictive controller for this system. Based on the characteristics of the ejector, the key controller objective is to fast track critical operation...
In order to solve the problem that the following-speed performance of upright vehicle is not strong caused by the conflict between the speed control and the vertical control, the control method of upright vehicle is presented based on fuzzy PI. In the design process of fuzzy PI controller, firstly, the system status of upright vehicle under different working conditions is analyzed. Secondly, the setting...
Urban congestion in major cities of Malaysia is getting severe over decades with increasing active vehicles and travelling time on the road. Part of Intelligent Transportation Systems development involves advanced computation in traffic management to cope for the projecting congestion trend. This work simulates traffic system and develop an optimising algorithm to instruct the traffic signal timing...
Traffic flow pattern appears to be random and makes it more challenging to model and analyse. This paper aims to present a traffic model based on NaSchr model, but with a revised rule for randomisation. User can trigger a manual braking on certain cars and its effect on traffic flow can be observed and analysed. The traffic cellular automata model with manual braking mode is applied to a single lane...
Sense of self-agency has been proposed in psychology field, and it is the sense that I am the initiator or source of the action. Human perception should be considered to design a better interface, so that sense of agency is spotlighted in ergonomics and robotics interface design field. In previous study we concluded that sense of agency is affected by both of a noise and a delay in the case of an...
In the development of autonomous vehicles, the main focus of sensor research has been in relation to environmental perception, and only minimal work has focused on the human–vehicle interaction perspective. However, human factors need to be considered to ensure the safe operation of partially autonomous vehicles. This study briefly introduces a design methodology for the takeover request (TOR) time...
An always-growing number of cars are equipped with radars, mainly used for drivers and passengers' safety. In particular, according to European Telecommunications Standards Institute (ETSI) one specific frequency band is dedicated to automatic cruise control long-range radar operating around 77 GHz (W-band). After the discussion of the Mie scattering formulation applied to a weather radar working...
Searching for a parking spot wastes time and energy, and becomes more prevalent with electric vehicles. This waste can be reduced by assigning drivers to parking lots based on their destination and arrival time. In such a system, drivers could request a parking spot in advance and be alerted (e.g., via their phone or vehicle) of their assignment to a specific parking lot or available spot. In this...
A test stand consisting of one-third segment car body which simulates bending vibration is developed to evaluate ride comfort of maglev vehicles. The test stand utilizes hardware-in-the-loop simulation (HILS), which simulates motion of the missing segment using numerical simulation. Experimental results confirm that the test stand with the HILS system can generate the bending vibration accurately...
In order to study the basic discipline of road traffic flow after the accident, considering the effect of vehicle speed on the basis of traditional cellular automaton, an improved NS model is proposed. Through analyzing the urban traffic flow under the influence of accident vehicles, urban dual-lane traffic flow model under the influence of accident vehicles is constructed, namely vehicle lane-changing...
Mathematical models of the transport flow based on the equation of continuity of the transport stream are analyzed. A method for approximating the observational data on the relationship between the flow density and the velocity of motion based on the modification of the method of least squares is developed. A mathematical model of a diffusion-type traffic flow in stochastic conditions is proposed.
In this paper, the challenges of Ultra Wide Band localization for key fob applications in vehicular environments are discussed. Trilateration based Kalman and particle filter approaches are discussed regarding their applicability to this task. A particle filter method is proposed which combines the benefit of enabling non-Gaussian observation error distribution and direct mapping of a particle cloud...
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