Braking Distance Estimation by Simulation
TL;DR: In this article, a simulation of car braking and braking distance estimation in different conditions is presented, and the results of simulation give the braking distances, which are necessary for safety cars distance estimation for different road surfaces, cars speeds and other conditions.
Abstract: The present-day computer power enables (parallel to tests) the simulation of processes of cars safety assurance by specialized software. This article describes a simulation of car braking and braking distance estimation in different conditions. The simulating model has been made in MATLAB/Simulink. The results of simulation give the braking distances, which are necessary for safety cars distance estimation for different road surfaces, cars speeds and other conditions.
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TL;DR: It was determined that obtained accident risk coefficients could be used to detection of accident risk with minor errors that especially at low speeds up to 60 km/h.
Abstract: In this paper, a new model based on factors of driver, vehicle and environment was developed to determine the ‘safe stopping distance’ of the vehicles, and tested on real road conditions by using equipment placed on the vehicle. The new stopping distance model has been developed based on the stopping distance formula commonly used in the literature. Then, an ‘active driver sight field’ was created considering effect of factors of driver, vehicle and environment. The safe field of view of driver, the safe escape area and safe stopping distance value of vehicle was transferred continuously during driving to the driver through the driver information screen positioned on front console in vehicle cockpit. In addition, a new approach has been developed to evaluate possible accident risks by using relationship between the safe escape area of the vehicle and the safe field of view of the driver. As a result, generalised stopping distance formula was yielded results closer to the actual road results, when expanded by using factors of driver, vehicle and environment. It was determined that obtained accident risk coefficients could be used to detection of accident risk with minor errors that especially at low speeds up to 60 km/h.
10 citations
09 Jun 2022
TL;DR: A new collaborative search methodology and lane switching algorithm for semi-automatic vehicles S-AV will be proposed that will contribute to maintaining safety and comfort rules between vehicles to achieve safe road travel within real time even though there are vehicles traveling at high speeds on the highway.
Abstract: There are many Vehicle Ad-Hoc Network (VANET) applications that can cause real problems and serious accidents for passengers using vehicles along the highway if the rules for changing the safe lane (overtaking) between vehicles on the road are violated or not. The nature of the use of the highway and the high speed driving it requires, as well as changes in traffic conditions, vehicle density, traffic situation or road weather conditions, and unexpected obstacles on the highway make it difficult to find enough time and real-time information needed to make the right decision at the right time and place. In this article, a new collaborative search methodology and lane switching algorithm for semi-automatic vehicles S-AV will be proposed that will contribute to maintaining safety and comfort rules between vehicles to achieve safe road travel within real time even though there are vehicles traveling at high speeds on the highway. We will propose an algorithm to classify the types of safe overtaking between vehicles with different maneuvering conditions on the highway according to the road condition where they are categorized into major categories and analyzed critically based on various performances. This new algorithm will increase the comfort factor and increase the safety of vehicles traveling on the highway. Finally, we submitted proposals for future research approaches to develop and enrich scientific research related to VANET to explore how to ensure the appropriate decision to proceed safely between vehicles on the highway and within urban cities where this presents a major research challenge to encourage researchers to link the driving and steering of semi-autonomous vehicles S-AV with driver biometrics to improve safety on highways and urban cities.
2 citations
01 Jul 2022
TL;DR: In this paper , an algorithm for safe overtaking maneuver for connected vehicles (what we called S-AV), the algorithm contributes to emphases the rules of safe lane-change along the highway to achieve the right decision for safe vehicles-overtaking at the right time.
Abstract: In the present world, a lots of highway users could fall in unsafe overtaking maneuver to make un appropriate lane change, this is almost caused an a lot of highway accidents. Vehicular Ad-hoc Networks (VANET) applications can present many solutions to facilitate the driving along highways, such as driving awareness, V2V communication and data transmission, traffic analysis and so on. It is a principal task to make the right decision within right time due to the high speed of the vehicles and the changing conditions on the highway. In this article, we suggest an algorithm for safe overtaking maneuver for connected vehicles (what we called S-AV), the algorithm contributes to emphases the rules of safe lane-change along the highway to achieve the right decision for safe vehicles-overtaking at the right time. The proposed algorithm can classify the safe overtaking between vehicles into major categories based on different highway traffic situations, thus, the classification also based on different criteria of vehicle performance. The proposed algorithm designed to contribute in increase of driving safety on the highway. Finally, we have to suggest some vital research subjects that deals with VANETs safety and comfort issues that seek to the traffic decision center to advice all highway user with real-time information about the safe overtaking between vehicles at any segment of highway, it is a critical research issue to inspire the researchers how to integrate the connected vehicles with driver drowsiness detection techniques to obtain best safety factor on highway driving.
References
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Patent•
12 Jun 1980TL;DR: In this article, a road surface condition detection system comprising light projector and light receiving means for projecting light including the infrared region of the spectrum to the road surface to sense the condition thereof, the infrared having wavelengths at which the reflectance of snow is smaller than that of road surface in a dry condition.
Abstract: Road surface condition detection system comprising light projector means for projecting light including the infrared region of the spectrum to a road surface to sense the condition thereof, the infrared having wavelengths at which the reflectance of snow is smaller than that of the road surface in a dry condition, light receiving means for receiving light reflected from the road surface, comparisons means for comparing the output signals generated from the light receiving means with reference signal levels corresponding to dry, wet, snowy and frozen conditions, and judging means for judging the road surface to be one of the conditions in accordance with results of comparison.
108 citations
Patent•
04 Jul 1991TL;DR: In this article, a method for detecting a friction coefficient of the road surface includes a detection step of detecting an operating angle of the steering wheel of the vehicle, a vehicle speed and an operating pressure of the hydraulic power steering unit for the front wheels.
Abstract: A method for detecting a friction coefficient of the road surface includes a detection step of detecting an operating angle of the steering wheel of the vehicle, a vehicle speed and an operating pressure of the hydraulic power steering unit for the front wheels, and a calculation step of calculating the friction coefficient of the road surface on turning of the vehicle by considering relationships among a slip angle of the front wheel, the friction coefficient of the road surface and a cornering force of the front wheels. The method further includes a step of prohibiting the execution of the calculation step when the steering wheel is turned back, whereby the calculation step is executed only when the direction of the operating pressure of power steering unit is in the equiphase with the operating direction of the steering wheel. Also, a four-wheel steering system includes has a rear steering actuator for steering the rear wheels so as to increase the steering angle of the rear wheels as the friction coefficient of the road surface calculated by the above-described method decreases.
54 citations
01 Dec 2008
TL;DR: A novel approach is presented which aims to bring these two fields closer by specifying the requirements and capabilities within a UML2 model architecture style and illustrating how these model elements are used to generate specifications for dynamic runtime service brokering given different modes of a software system.
Abstract: Industry and academia are exploring ways to exploit the services paradigm to assist in the challenges of software self-management. In this paper we present a novel approach which aims to bring these two fields closer by specifying the requirements and capabilities within a UML2 model architecture style and illustrating how these model elements are used to generate specifications for dynamic runtime service brokering given different modes of a software system. The approach is implemented in a tool suite integrated into the Eclipse IDE with a prototype runtime service broker engine.
14 citations
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