scholarly journals The Study Of Special Vehicle Braking System Working Temperatures

2015 ◽  
Vol 21 (3) ◽  
pp. 878-882
Author(s):  
Alin-Marian Puncioiu ◽  
Ioan Vedinaş ◽  
Valentin Vînturiş
Keyword(s):  
Thermal Regime ◽  
Dynamic Performance ◽  
Braking System ◽  
Vehicle Velocity ◽  
Special Vehicle ◽  
System Characteristics

Abstract The paper presents the calculation of brake mechanism which involves determining the forces needed to be applied by the drive to reach the required braking moments at the wheel. The importance of braking system characteristics derived from how to active handle the vehicle and affect, in a decisive measure, valuing the performance of vehicle velocity and acceleration. Also, to assess the performance of braking mechanism, they aim to define the coefficient of efficiency and determining effectiveness characteristic depending on the thermal regime of work. Heating influences the dynamic performance of the vehicle brakes safely. To identify the evolution of brake heating they have become the realization of a measurement chain that was used for the measurement of all parameters during a long braking period. In the conclusions presented they show temperatures measured and how they could affect the determination of wear regime in operation.

scholarly journals Design, Analysis and Application of Single-Wheel Test Bench for All-Electric Antilock Braking System in Electric Vehicles

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1294
Author(s):  
Xiangdang XUE ◽  
Ka Wai Eric CHENG ◽  
Wing Wa CHAN ◽  
Yat Chi FONG ◽  
Kin Lung Jerry KAN ◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Test Bench ◽  
Potential Candidate ◽  
Vertical Force ◽  
Abs Algorithms ◽  
Braking System ◽  
Vehicle Velocity ◽  
Antilock Braking System ◽  
Antilock Braking ◽  
Electromechanical Brake

An antilock braking system (ABS) is one of the most important components in a road vehicle, which provides active protection during braking, to prevent the wheels from locking-up and achieve handling stability and steerability. The all-electric ABS without any hydraulic components is a potential candidate for electric vehicles. To demonstrate and examine the all-electric ABS algorithms, this article proposes a single-wheel all-electric ABS test bench, which mainly includes the vehicle wheel, the roller, the flywheels, and the electromechanical brake. To simulate dynamic operation of a real vehicle’s wheel, the kinetic energy of the total rotary components in the bench is designed to match the quarter of the one of a commercial car. The vertical force to the wheel is adjustable. The tire-roller contact simulates the real tire-road contact. The roller’s circumferential velocity represents the longitudinal vehicle velocity. The design and analysis of the proposed bench are described in detail. For the developed prototype, the rated clamping force of the electromechanical brake is 11 kN, the maximum vertical force to the wheel reaches 300 kg, and the maximum roller (vehicle) velocity reaches 100 km/h. The measurable bandwidth of the wheel speed is 4 Hz–2 kHz and the motor speed is 2.5 Hz–50 kHz. The measured results including the roller (vehicle) velocity, the wheel velocity, and the wheel slip are satisfactory. This article offers the effective tools to verify all-electric ABS algorithms in a laboratory, hence saving time and cost for the subsequent test on a real road.

The Pulse Method for the Determination of Aircraft Dynamic Performance

1950 ◽  
Vol 17 (1) ◽  
pp. 22-38 ◽  
Author(s):  
R. C. SEAMANS ◽  
B. P. BLASINGAME ◽  
G. C. CLEMENTSON
Keyword(s):  
Dynamic Performance ◽  
Pulse Method

scholarly journals Style features of recoding the personal life-story in autobiographical memory as a result of intra-familial transmission

2015 ◽  
Vol 10 (2) ◽  
pp. 1-15
Author(s):  
A.R. Alyusheva
Keyword(s):  
Autobiographical Memory ◽  
Deviant Behavior ◽  
Life Story ◽  
Social Orientation ◽  
The Social ◽  
The Family ◽  
Stable Family ◽  
System Characteristics ◽  
Individual Style

We studied the stylistic features of autobiographical memory structure which can be significant for the understanding the sources of intrapersonal propensity for deviant behavior among young people. From the standpoint of the Vygotsky's theory we studied 102 "parent-teenager" dyads in order to examine the mechanisms of cultural determination of autobiographical memory macrostructure in context of reproducing the life scenarios. We differentiate the social influences of various levels on the formation of system characteristics of autobiographical memory, which constitute individual style of fixation personal stories of the past. We have found а stable family-reproduced indicators of autobiographical memories belonging to the "family life" scenario, these include the emotional profile of the memories of lives, the level of scenario (fixation of socially approved events); representation of memories of other people (social orientation). The low values of these indicators can be the risk factors for asocial behavior.

Closed aperture CW Z-scan of L-tryptophan for determination of optical nonlinearity in the thermal regime

2021 ◽  
Author(s):  
Sarfuddin Tarek ◽  
Syed Faruque ◽  
Sharif Sharafuddin ◽  
Khan Hasan ◽  
A K M Hossain ◽  
...  
Keyword(s):  
Thermal Regime ◽  
Optical Nonlinearity ◽  
Closed Aperture

Contributions to the Determination of the Real Clearance in Sliding Bearings

1965 ◽  
Vol 87 (3) ◽  
pp. 781-784 ◽  
Author(s):  
Al. Nica
Keyword(s):  
Temperature Distribution ◽  
Elastic Properties ◽  
Thermal Regime ◽  
Calculation Method ◽  
Radial Clearance ◽  
Sliding Bearings ◽  
The Real

When the bearing is running, its clearance is no longer equal to the initial one, as a result of the thermal regime and load. This paper presents a calculation method which takes into consideration the temperature distribution in the bearing, the load, and the elastic properties of the materials. The deduced calculus relations allow to establish the correction of the initial radial clearance in order to obtain the designed clearance when the bearing is running.

Vehicle Stability Control in Anti-Lock Braking System on Split-U Road Surface Considering Driver in the Loop

2013 ◽  
Author(s):  
Liangyao Yu ◽  
Changxi You ◽  
Jian Song
Keyword(s):  
Driver Behavior ◽  
Research Work ◽  
Stability Control ◽  
Road Surface ◽  
Control Law ◽  
Vehicle Stability ◽  
Braking System ◽  
Vehicle Stability Control ◽  
Vehicle Velocity ◽  
The Stability

With the introduction and development of Anti-lock Braking System in modern vehicles, remarkable progress in brake efficiency and brake stability has been achieved. However, it is a significant challenge to deal with the control law in certain critical situations, especially on split-μ road surface. In low vehicle velocity, as some standards and regulations specified, the stability in such situation is comparably easy to be achieved. But with the vehicle velocity increasing, the driver behavior contributes a large impact on the trajectory maintenance and easily causes sympathetic vibration of the vehicle because of the unexpected synchronization between the driver input and control law output, which could be very dangerous. This paper presents the research work in vehicle stability control when Anti-lock Braking System is activated at split-μ road surface. The principal contribution of this work is that the driver behavior is taken into account and the control law is tuned to adapt to this situation, which effectively maintains the stability of the vehicle without compromising the brake efficiency.

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