Dynamic Brake Force Distribution for Heavy Commercial Road Vehicles Using Wheel Slip Regulation

2019 ◽  
Author(s):  
Akhil Challa ◽  
K. B. Devika ◽  
Shankar C. Subramanian ◽  
Gunasekaran Vivekanandan ◽  
Sriram Sivaram
Keyword(s):  
Sliding Mode ◽  
Traction Force ◽  
Simulation Software ◽  
Force Distribution ◽  
Vehicle Dynamic ◽  
Road Vehicles ◽  
Wheel Slip ◽  
Braking Performance ◽  
Brake Force ◽  
Brake Force Distribution

Abstract Wheel lock is an undesired phenomenon in Heavy Commercial Road Vehicles (HCRVs) and wheel slip control within a desired range is of crucial importance for stable and effective braking. This study proposes a framework to distribute brake force dynamically between the front and rear wheels, primarily to avoid instability by preventing wheel lock. Further, it ensures the maximum utilization of the available traction force at the tire-road interface that varies during the course of braking due to factors like load transfer. Wheel slip regulation provides an approach to maximize braking performance that subsumes the effects of varying road, load and braking conditions that occur during vehicle deceleration. The methodology proposed consists of a wheel slip controller that calculates the required brake force distribution parameters, which are then provided to the brake controller for control action. Sliding mode control was used because of the nonlinear nature of the longitudinal vehicle dynamic model considered and for robustness towards different parameter variations. The algorithm was implemented on a Hardware-in-Loop test setup consisting of a pneumatic air brake system, interfaced with IPG-TruckMaker® (a vehicle dynamic simulation software), and co-simulated with MATLAB-Simulink®. It was found that this algorithm improved the braking performance of a HCRV both in terms of stopping distance and vehicle stability.

Study of the Antilock Braking System with Electric Brake Force Distribution

2010 ◽  
Vol 29-32 ◽  
pp. 1985-1990 ◽  
Author(s):  
Ju Wei Li ◽  
Jian Wang
Keyword(s):  
Control Method ◽  
Sliding Mode ◽  
Force Distribution ◽  
Standard Equipment ◽  
Braking System ◽  
Antilock Braking System ◽  
Asphalt Road ◽  
Brake Force ◽  
Antilock Braking ◽  
Brake Force Distribution

Antilock braking system (ABS) is a standard equipment for passenger car, it can prevent automobile wheels from locking-up and improve braking performance. Electronic brake force distribution (EBD) can prevent the rear wheels from locking prior to the front wheels, it can automatically adjust the braking force distribution scale among the wheels. In this paper, a vehicle model and tire model are developed, a sliding mode controller is designed for ABS system and a fuzzy controller is designed for EBD system. Dry asphalt road and wet asphalt road are used to simulate the performance of ABS/EBD system. The simulation results show that the control method can make full use of the respective advantages of ABS and EBD systems.

Analysis and Research of Automotive Brake Performance Based on MATLAB

2014 ◽  
Vol 556-562 ◽  
pp. 1392-1395
Author(s):  
Chen Zhao
Keyword(s):  
Visual Analysis ◽  
Simulation Software ◽  
Force Distribution ◽  
Distribution Characteristics ◽  
Brake Force ◽  
Brake Performance ◽  
Brake Force Distribution ◽  
Wheel Brake ◽  
Automotive Brake ◽  
The Ideal

Based on the application of the vehicle parameters, the article analyzed the brake process and its performance by MATLAB. The article proposed analytical method and process of automotive brake ideal conditions by simulation software MATLAB. And through drawing the ideal front and rear brake force distribution characteristics, calculated and analyzed the wheel brake force, adhesion coefficient and brake strength. Also the article provided the foundations of convenient calculation method and visual analysis for automotive brake performance.

ON THE QUESTION OF BRAKING ARTICULATED BUSES

2021 ◽  
pp. 10-18
Author(s):  
Volodymyr Sakhno ◽  
Volodymyr Poliakov ◽  
Dmytro Yaschenko ◽  
Oleksii Korpach ◽  
Denis Popelysh
Keyword(s):  
Distribution Coefficients ◽  
Force Distribution ◽  
Design Features ◽  
Braking Performance ◽  
The Road ◽  
Braking Distance ◽  
Brake Force ◽  
The Difference ◽  
Brake Force Distribution ◽  
The Stability

The safe movement of a car and a road train is largely determined by its braking properties. The nature of the movement of the road train is fundamentally different from the movement of a single car. The difference can be explained by the presence of additional forces arising in the articulation of the links of the vehicle, as well as forces and moments acting on its individual links and the movement of the vehicle as a whole. Their effect is especially noticeable when braking a road train, which may be accompanied by folding links and loss of stability of the vehicle. As a result of the study, the optimal values of the brake force distribution coefficients for a fully loaded articulated bus are obtained, which provide both high braking efficiency and the stability of the articulated bus (AВ) during braking. The coefficients are determined taking into account the design features of the brake mechanisms and their geometric dimensions, providing the required braking performance. For the selected values of the braking force distribution coefficients along the axes of the AВ and the coefficients that take into account the design features of the braking mechanisms and their geometric dimensions, the braking distance during braking by the main or working braking system and the spare one satisfy the requirements of regulatory documents. With the selected asynchronous response of the brake drives of the bus and trailer, the steady deceleration of the АВ is slightly less than the standard.

scholarly journals Sliding Mode Control of Vehicle Equipped with Brake-by-Wire System considering Braking Comfort

2020 ◽  
Vol 2020 ◽  
pp. 1-13 ◽  
Author(s):  
Shuai Chen ◽  
Xilong Zhang ◽  
Jizhong Wang
Keyword(s):  
Sliding Mode Control ◽  
Sliding Mode ◽  
Classification Method ◽  
Force Distribution ◽  
Slip Ratio ◽  
Complete Control ◽  
Distribution Strategy ◽  
Mode Control ◽  
Brake Force ◽  
Brake Force Distribution

For passengers, the most common feeling during running on the bumpy road is continuous vertical discomfort, and when the vehicle is braking, especially the emergency braking, the instantaneous inertia of the vehicle can also cause a strong discomfort of the passengers, so studying the comfort of the vehicle during the braking process is of great significance for improving the performance of the vehicle. This paper presented a complete control scheme for vehicles equipped with the brake-by-wire (BBW) system aiming at ensuring braking comfort. A novel braking intention classification method was proposed based on vehicle braking comfort, which divided braking intention into mild brake, medium comfort brake, and emergency brake. Correspondingly, in order to improve the control accuracy of the vehicle brake system and to best meet the driver’s brake needs, a braking intention recognizer relying on fuzzy logic was established, which used the road condition and the brake pedal voltage and its change rate as input, output real-time driver's braking intention, and braking intensity. An optimal brake force distribution strategy for the vehicle equipped with the BBW system based on slip rate was proposed to determine the relationship between braking intensity and target slip ratio. Combined with the vehicle dynamics model, improved sliding mode controller, and brake force observer, the joint simulation was conducted in Simulink and CarSim. The cosimulation results show that the proposed braking intention classification method, braking intention recognizer, brake force distribution strategy, and sliding mode control can well ensure the braking comfort of the vehicle equipped with the BBW system under the premise of ensuring brake safety.

Analysis of cornering response and stability of electrified heavy commercial road vehicles with regenerative braking

2019 ◽  
Vol 234 (6) ◽  
pp. 1672-1689 ◽  
Author(s):  
Kesavan Valis Subramaniyam ◽  
Shankar C Subramanian
Keyword(s):  
Research Work ◽  
Sensitivity Study ◽  
Center Of Gravity ◽  
Simulation Software ◽  
Regenerative Braking ◽  
Force Distribution ◽  
Road Vehicle ◽  
Vehicle Simulation ◽  
Brake Force ◽  
Brake Force Distribution

Additional powertrain components and regenerative braking are two important factors that may affect the performance and stability of electrified vehicle cornering. The location of additional components affects the vehicle’s center of gravity (CG) position and thereby the stability of the vehicle. As regenerative braking is possible only on driven wheels, the brake force distribution between front and rear wheels may not follow the ideal brake force distribution curve. Hence, applying maximum regenerative braking during cornering may affect vehicle stability, and this has motivated the analysis presented in this paper. The scope of this research work includes obtaining a model for the regenerative brake system, which was then used to analyze the heavy commercial road vehicle lateral dynamic response during combined cornering and regenerative braking. A sensitivity study was carried out regarding variations in center of gravity, longitudinal speed, and tire–road traction coefficient [Formula: see text]. The IPG TruckMaker® vehicle simulation software running in a hardware-in-loop experimental system was used to study the heavy road vehicle cornering performance. The results showed that applying braking on a constant radius path required correction in the steering input to follow the desired path. However, the amount of steering correction required during regenerative braking was higher than that with conventional friction braking. Moreover, applying maximum regenerative braking at higher longitudinal speeds on snowy roads and split- µ roads has a higher impact on vehicle cornering performance compared with that on dry roads. Furthermore, a co-operative braking strategy with an optimum brake force sharing between regenerative braking and friction braking was developed to improve the electrified heavy commercial road vehicle’s cornering stability and handling performance during cornering and braking.

Collaborative control of a dual electro-hydraulic regenerative brake system for a rear-wheel-drive electric vehicle

2018 ◽  
Vol 233 (4) ◽  
pp. 1035-1046 ◽  
Author(s):  
Jonathan Nadeau ◽  
Philippe Micheau ◽  
Maxime Boisvert
Keyword(s):  
Electric Vehicle ◽  
Energy Recovery ◽  
Rear Wheel ◽  
Brake System ◽  
Force Distribution ◽  
Hydraulic Brake ◽  
Brake Pressure ◽  
Wheel Drive ◽  
Brake Force ◽  
Brake Force Distribution

Within the field of electric vehicles, the cooperative control of a dual electro-hydraulic regenerative brake system using the foot brake pedal as the sole input of driver brake requests is a challenging control problem, especially when the electro-hydraulic brake system features on/off solenoid valves which are widely used in the automotive industry. This type of hydraulic actuator is hard to use to perform a fine brake pressure regulation. Thus, this paper focuses on the implementation of a novel controller design for a dual electro-hydraulic regenerative brake system featuring on/off solenoid valves which track an “ideal” brake force distribution. As an improvement to a standard brake force distribution, it can provide the reach of the maximum braking adherence and can improve the energy recovery of a rear-wheel-drive electric vehicle. This improvement in energy recovery is possible with the complete substitution of the rear hydraulic brake force with a regenerative brake force until the reach of the electric powertrain constraints. It is done by performing a proper brake pressure fine regulation through the proposed variable structure control of the on/off solenoid valves provided by the hydraulic platform of the vehicle stability system. Through road tests, the tracking feasibility of the proposed brake force distribution with the mechatronic system developed is validated.

Sign in / Sign up

Export Citation Format

Share Document