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Abstract

Details

The Handbook of Road Safety Measures
Type: Book
ISBN: 978-1-84855-250-0

Article
Publication date: 31 May 2022

Sutapa Mondal and Arup Kumar Nandi

The purpose of this paper is to design an improved parallel regenerative braking system (IPRBS) for electric vehicles (EVs) that increases energy recovery with a constant…

Abstract

Purpose

The purpose of this paper is to design an improved parallel regenerative braking system (IPRBS) for electric vehicles (EVs) that increases energy recovery with a constant brake pedal feel (BPF).

Design/methodology/approach

The conventional hydro-mechanical braking system is redesigned by incorporating a reversing linear solenoid (RLS) and allowed to work in parallel with a regenerative brake. A braking algorithm is proposed, and correspondingly, a control system is designed for the IPRBS for its proper functioning, and a mathematical model is formulated considering vehicle drive during braking. The effectiveness of IPRBS is studied by analyzing two aspects of regenerative braking (BPF and regenerative efficiency) and the impact of regenerative braking contribution to range extension and energy consumption reduction under European Union Urban Driving Cycle (ECE).

Findings

IPRBS is found to maintain a constant BPF in terms of deceleration rate vs pedal displacement during the entire braking period irrespective of speed change and deceleration rate. The regenerative ratio of IPRBS is found to be high compared with conventional parallel regenerative braking, but it is quite the same at high deceleration.

Originality/value

A constant BPF is achieved by introducing an RLS between the input pushrod and booster input rod with appropriate controller design. Comparative analysis of energy regenerated under different regenerative conditions establishes the originality of IPRBS. An average contribution ratio to energy consumption reduction and driving range extension of IPRBS in ECE are obtained as 18.38 and 22.76, respectively.

Details

World Journal of Engineering, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 12 October 2010

S. Vinodh and M. Arun

The purpose of this paper is to report a research in which creative design concepts have been applied for braking system synchronization in two wheeler bikes.

Abstract

Purpose

The purpose of this paper is to report a research in which creative design concepts have been applied for braking system synchronization in two wheeler bikes.

Design/methodology/approach

Literature review on creative design concepts and braking system scenario has been carried out. By studying the existing braking system and applying creative design concepts, modified braking system has been developed.

Findings

The research experience indicated that the effectiveness of braking system has been improved by the adoption of proposed system.

Research limitations/implications

The research has been carried out for an automobile two wheeler. The findings of this research work could be extended to similar models of two wheelers.

Practical implications

The usage of the proposed system reduces the number of accidents and it adds significantly to the life of the brakes.

Originality/value

A case study has been reported to indicate the application of creative design concepts for enhancing the synchronization of automotive braking system in two wheeler bikes.

Details

Journal of Engineering, Design and Technology, vol. 8 no. 3
Type: Research Article
ISSN: 1726-0531

Keywords

Article
Publication date: 13 November 2009

Zhang Ming, Nie Hong, Wei Xiao‐hui, Qian Xiaomei and Zhou Enzhi

The purpose of this paper is to introduce a co‐simulation method to study the ground maneuvers of aircraft anti‐skid braking and steering.

6701

Abstract

Purpose

The purpose of this paper is to introduce a co‐simulation method to study the ground maneuvers of aircraft anti‐skid braking and steering.

Design/methodology/approach

A virtual prototype of aircraft is established in the multibody system dynamics software MSC.ADAMS/Aircraft. The anti‐skid braking control model, which adopts the multi‐threshold PID control method with a slip‐velocity‐controlled, pressure‐bias‐modulated (PBM) system, is established in MATLAB/Simulink. EASY5 is used to establish the hydraulic system of nose wheel steering. The ADAMS model is connected to block diagrams of the anti‐skid braking control model in MATLAB/Simulink, and is also connected to the block diagrams of nose wheel steering system model in EASY5, so that the ground maneuvers of aircraft anti‐skid braking and steering are simulated separately.

Findings

Results are presented to investigate the performance of anti‐skid braking system in aircraft anti‐skid simulation. In aircraft steering simulation, the influence of two important parameters on the forces acting on the tires is discussed in detail, and the safe area to prevent aircraft sideslip is obtained.

Originality/value

This paper presents an advanced method to study the ground maneuvers of aircraft anti‐skid braking and steering, and establishes an integrated aircraft model of airframe, landing gear, steering system, and anti‐skid braking system to investigate the interaction of each subsystem via simulation.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 28 no. 6
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 20 September 2022

Lalit Narendra Patil, Hrishikesh P. Khairnar and S.G. Bhirud

Electric vehicles are well known for a silent and smooth drive; however, their presence on the road is difficult to identify for road users who may be subjected to certain…

Abstract

Purpose

Electric vehicles are well known for a silent and smooth drive; however, their presence on the road is difficult to identify for road users who may be subjected to certain incidences. Although electric vehicles are free from exhaust emission gases, the wear particles coming out from disc brakes are still unresolved issues. Therefore, the purpose of the present paper is to introduce a smart eco-friendly braking system that uses signal processing and integrated technologies to eventually build a comprehensive driver assistance system.

Design/methodology/approach

The parameters obstacle identification, driver drowsiness, driver alcohol situation and heart rate were all taken into account. A contactless brake blending system has been designed while upgrading a rapid response. The implemented state flow rule-based decision strategy validated with the outcomes of a novel experimental setup.

Findings

The drowsiness state of drivers was successfully identified for the proposed control map and set up vindicated with the improvement in stopping time, atmospheric environment and increase in vehicle active safety regime.

Originality/value

The present study adopted a unique approach and obtained a brake blending system for improved braking performance as well as overall safety enhancement with rapid control of the vehicle.

Details

World Journal of Engineering, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 17 May 2022

Vinoth Kumar K., Loganathan T.G. and Jagadeesh G.

The Purpose of this study is to prove the possibility of developing low cost mechanical anti – lock braking system (ABS) for the passenger’s safety.

Abstract

Purpose

The Purpose of this study is to prove the possibility of developing low cost mechanical anti – lock braking system (ABS) for the passenger’s safety.

Design/methodology/approach

The design methodology of the proposed newer mechanical ABS comprises of two units, namely, the braking unit and wheel lock prevention unit. The braking unit actuates the wheel stopping as and when the driver applies the brake, whereas the wheel lock prevention unit initiates wheel release to prevent locking and subsequent slip/skidding. The brake pedal with master cylinder assembly and double-arm cylinder forms the braking unit, brake pad cylinder, movable brake pad, solenoid valve and dynamo forms the wheel lock prevention unit. The dynamo coupled with the rotor energises/de-energises the solenoid values to direct airflow for applying brake and release it, which makes the system less energy-dependent.

Findings

The braking unit aids in vehicle stops, by locking the disc with the brake pad actuated by a double-arm cylinder. The dynamo energises the solenoid valve to activate the brake pad cylinder piston for applying the brake on the disc. Instantaneously, on applying the brake the dynamo de-energises the solenoid to divert the pneumatic flow for retracting the brake pad thereby minimizing the braking torque. The baking torque reduction revives the wheel rotating and prevents slip/skidding.

Originality/value

Mechanical ABS preventing wheel lock by torque reduction principle is a novel method that has not been evolved so far. The system was designed with repair/replacement of the parts and subcomponents to support higher affordability on safety grounds.

Details

World Journal of Engineering, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 1 October 1975

ALTHOUGH assisted by such agencies as aerodynamic drag and engine reverse thrust, slowing and stopping a modern aircraft on the ground is achieved principally by the use…

Abstract

ALTHOUGH assisted by such agencies as aerodynamic drag and engine reverse thrust, slowing and stopping a modern aircraft on the ground is achieved principally by the use of wheel brakes to generate a horizontal drag force between the tyres and the ground. In the braking process the aircraft kinetic energy is converted to heat energy in the brakes by the application of hydraulic power to the brake discs to create friction. The heat energy is dissipated by natural or forced cooling.

Details

Aircraft Engineering and Aerospace Technology, vol. 47 no. 10
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 22 June 2010

Takahiro Wada, Shoji Hiraoka and Shun'ichi Doi

The purpose of this paper is to realize a smooth and secure brake assistance system to avoid rear‐end collision of automobiles.

Abstract

Purpose

The purpose of this paper is to realize a smooth and secure brake assistance system to avoid rear‐end collision of automobiles.

Design/methodology/approach

It is important to judge necessity of deceleration assistance as early as possible and initiate the assistance naturally in order to reduce rear‐end crashes. However, it easily results in driver's discomfort. In addition, deceleration profile of the automatic braking is also important to realize smooth collision avoidance. In this paper, a deceleration assistance control for collision avoidance will be proposed based on the formulated braking behavior models of expert drivers to realize smooth, secure brake assistance.

Findings

The proposed brake assistance system can realize smooth deceleration profile and appropriate final status of the two vehicles for various approaching conditions. In addition, experimental results using a driving simulator will show validity of the proposed system based on subjective evaluation. It is also shown that the system realizes smooth deceleration control even under existence of the interaction between human driver and the system.

Research limitations/implications

This paper does not deal with effect of the deceleration method on change of drivers' behavior, including driver's trust on the system. Over‐trust should be eliminated if any.

Originality/value

The originality of the paper is to derive smooth secure collision avoidance system based on the driver's perceptual risk model. This method can realize smooth collision avoidance behavior for the various approaching conditions with a unified simple algorithm.

Details

Industrial Robot: An International Journal, vol. 37 no. 4
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 1 December 1931

R. Waring Brown

IN a previous article the subject of wheel brakes for aeroplanes was surveyed and the various types of brake in use briefly described. It is now proposed to deal in exact…

Abstract

IN a previous article the subject of wheel brakes for aeroplanes was surveyed and the various types of brake in use briefly described. It is now proposed to deal in exact detail with hydraulic brakes, which are receiving more and more attention for installation in aircraft.

Details

Aircraft Engineering and Aerospace Technology, vol. 3 no. 12
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 December 1965

This paper describes the operation of the Hytrol electronic/hydraulic anti‐skid system manufactured by Dunlop Aviation Division under licence from the Hydro‐Aire Division…

Abstract

This paper describes the operation of the Hytrol electronic/hydraulic anti‐skid system manufactured by Dunlop Aviation Division under licence from the Hydro‐Aire Division, Crane Corporation, Burbank, U.S.A. The first British aircraft to be fitted with this second generation anti‐skid braking system is the British Aircraft Corporation One‐Eleven 400 Series on order for American Airlines.

Details

Aircraft Engineering and Aerospace Technology, vol. 37 no. 12
Type: Research Article
ISSN: 0002-2667

1 – 10 of over 5000