scholarly journals Safety is critical throughout all stages of aircraft operation, from air mission to ground operation. One of the most important airframe systems that influences the efficacy of ground safety is a wheel brake system. Aircraft ground speed deceleration requires the dissipation of kinetic energy, which depends on aircraft weight and speed. Significant levels of aircraft kinetic energy must be dissipated in the form of heat energy. The brakes of heavy aircraft are especially prone to overheating during landing and taxiing on the ground. The aim of this paper is to focus on the dangers caused by aircraft brakes when overheating and ways in which to eliminate brake overheating problems from a safety perspective.

2017 ◽  
Vol 94 ◽  
pp. 175-186
Author(s):  
Ján PIĽA ◽  
Peter KORBA ◽  
Michal HOVANEC
Keyword(s):  
Kinetic Energy ◽  
Heat Energy ◽  
Brake System ◽  
Ground Speed ◽  
Aircraft Brakes ◽  
Wheel Brake

Study on Health Monitoring Method of Aircraft Wheel Brake System

2021 ◽  
Author(s):  
Yan Liang ◽  
Yi Huang ◽  
Cunbao Ma ◽  
Yihan Guo ◽  
Biyuan Hu ◽  
...  
Keyword(s):  
Health Monitoring ◽  
Brake System ◽  
Monitoring Method ◽  
Wheel Brake

XX.—On the Partition of Heat Energy in the Molecules of Gases

1907 ◽  
Vol 27 ◽  
pp. 195-202
Author(s):  
Paul Ehrenfest
Keyword(s):  
Kinetic Energy ◽  
Heat Energy ◽  
Elastic Forces

In a paper published some time since, Mr Peddie takes up the following question: Given a gas whose molecules contain atoms which are held together by purely elastic forces, do there exist, even in this simplest type of multiply-atomic molecules, cases in which, when there is equilibrium of heat, the average equipartition of kinetic energy demanded by the Boltzmann-Maxwell Law does not exist?

Modeling, Experimentation and Simulation of a Brake Apply System

1994 ◽  
Vol 116 (1) ◽  
pp. 111-122 ◽  
Author(s):  
Y. Khan ◽  
P. Kulkarni ◽  
K. Youcef-Toumi
Keyword(s):  
Laboratory Experiments ◽  
Brake System ◽  
Physical Parameters ◽  
Master Cylinder ◽  
Pedal Force ◽  
Sensitivity Studies ◽  
Friction Parameters ◽  
Development And Validation ◽  
Wheel Brake ◽  
Analytical Dynamic

This study presents the development and validation of an analytical dynamic model of the brake apply system of a vehicle. The brake apply system includes the models for brake pedal, vacuum booster, master cylinder, and proportioning valves; the interactions with the wheel brake system, which comprises the front and rear foundation brakes, are included by modeling their compliances. Laboratory experiments are performed on a bench setup of the brake system and the experimental data is compared with the simulation results. The model is formulated such that the inputs are the pedal force applied by the driver, the vacuum supplied by the engine and the physical parameters of the brake components. Preliminary analysis shows that the simulation tracks the data quite closely throughout the regime of operation. Sensitivity studies are performed to show the effect of different friction parameters on the system performance.

scholarly journals Designing and Analyzing the Brake Master Cylinder for an ATV vehicle

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Shubham Upadhyaya ◽  
◽  
Divyam Raj ◽  
Kaushal Gupta ◽  
Rakesh Chander Saini ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Special Interest ◽  
Heat Energy ◽  
The Other ◽  
Hydraulic Pressure ◽  
Brake Pedal ◽  
Master Cylinder ◽  
Automotive Systems ◽  
Braking System ◽  
Wheel Brake

A braking system is a means of converting momentum into heat energy by creating friction in the wheel brakes. The braking system which works with the help of hydraulic principles is known as hydraulic braking systems. The most frequently used system operates hydraulically, by pressure applied through a liquid. These are the foot-operated brakes that the driver normally uses to slow or stop the car. Our special interest in hydraulics is related to the actions in automotive systems that result from pressure applied to a liquid. This is called hydraulic pressure. Since the liquid is not compressible, it can transmit motion. A typical braking system includes two basic parts. These are the master cylinder with the brake pedal and the wheel brake mechanism. The other parts are the connecting tubing, or brake lines, and the supporting arrangements. The present paper is about designing of Twin master cylinder system for an all-terrain vehicle and doing a feasibility study of its strength using ANSYS. Our work is focused on reducing weight which is one of the factors to increase efficiency. Reduction in weight and space, due to its compactness. The twin Master cylinder system is a great advancement in the braking system for an ATV. 3-D CAD modeling is done using SOLIDWORKS 2017, whereas the analysis of its strength is done using ANSYS.

scholarly journals Evaluation of smartIflow based on the Wheel Brake System from ARP4761

2018 ◽  
Vol 51 (24) ◽  
pp. 1255-1262
Author(s):  
Christian Müller ◽  
Philipp Hönig ◽  
Rüdiger Lunde
Keyword(s):  
Brake System ◽  
Wheel Brake

scholarly journals Mitochondrial energetics with transmembrane electrostatically localized protons: do we have a thermotrophic feature?

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
James Weifu Lee
Keyword(s):  
Kinetic Energy ◽  
Oxidative Phosphorylation ◽  
Liquid Membrane ◽  
Proton Motive Force ◽  
Chemical Form ◽  
Heat Energy ◽  
Membrane Interface ◽  
Cellular Functions ◽  
Important Addition ◽  
Localized Protons

AbstractTransmembrane electrostatically localized protons (TELP) theory has been recently recognized as an important addition over the classic Mitchell’s chemiosmosis; thus, the proton motive force (pmf) is largely contributed from TELP near the membrane. As an extension to this theory, a novel phenomenon of mitochondrial thermotrophic function is now characterized by biophysical analyses of pmf in relation to the TELP concentrations at the liquid-membrane interface. This leads to the conclusion that the oxidative phosphorylation also utilizes environmental heat energy associated with the thermal kinetic energy (kBT) of TELP in mitochondria. The local pmf is now calculated to be in a range from 300 to 340 mV while the classic pmf (which underestimates the total pmf) is in a range from 60 to 210 mV in relation to a range of membrane potentials from 50 to 200 mV. Depending on TELP concentrations in mitochondria, this thermotrophic function raises pmf significantly by a factor of 2.6 to sixfold over the classic pmf. Therefore, mitochondria are capable of effectively utilizing the environmental heat energy with TELP for the synthesis of ATP, i.e., it can lock heat energy into the chemical form of energy for cellular functions.

Electronic structural improvement and experimental verification of a tractor-semitrailer air brake system

2020 ◽  
Vol 234 (8) ◽  
pp. 2154-2161
Author(s):  
Zhecheng Jing ◽  
Ren He
Keyword(s):  
Kinetic Energy ◽  
Control Valve ◽  
Original System ◽  
Brake System ◽  
Bench Test ◽  
Structural Improvement ◽  
Β Phase ◽  
Air Brake System ◽  
Vehicle Test ◽  
Real Vehicle

Brake time delay, which is a major shortcoming of air brake systems, may lead to precarious situations. In this study, the structure of an air brake system of a tractor–semitrailer was optimized by adding a shuttle valve and a two-position-three-port electromagnetic valve between the control pipeline and the charging pipeline downstream of the trailer control valve. The new electronically controlled structure clearly ensures that the semitrailer brakes faster, as validated by a simulation, bench test, and real-vehicle test. The simulation results reveal considerable improvements in the braking time, braking distance, longitudinal kinetic energy, lateral kinetic energy, and β phase plane. The bench test indicates that in the proposed structure, the average response time of service brake cylinders of the first and third axles of the semitrailer are 0.12 and 0.17 s, respectively. In addition, the real-vehicle test indicated that the service brake cylinders of the first and third axles responded 0.12 and 0.18 s earlier than those in the original system, respectively.

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