Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 61 for “"Brakes"”.
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Thermomechanical Stability of Automotive Clutches and Brakes
<p>Finite element analyses were performed to evaluate the stability thermal buckling existing in clutch disks. The commercial software ABAQUS had been used. It was discovered that monotonically increasing thermal loads constantly result in axisymmetric buckling modes. When the maximum values of …
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Lightweight friction brakes for a road vehicle with regenerative braking. Design analysis and experimental investigation of the potential for mass reduction of friction brakes on a passenger car with regenerative braking.
… braking (RB) will minimize duty levels on the brakes, giving advantages including extended brake rotor and friction material life and, more significantly, reduced brake mass and minimised brake pad wear. In this thesis, a mathematical analysis (MATLAB) has been used to analyse the accessibility …
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Molecular Devices: Brakes, Rotors, Sensors, and Balances and the Non-Covalent Interactions That Power Them
<p>In 1959, Richard Feynman's famous lecture 'There's Plenty of Room at the Bottom' predicted the advent of nano- and molecular-scale machines. Only recently has Feynman's vision begun to be realized with the syntheses of molecular devices that convert chemical or kinetic energy into controlled …
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Forgotten Landscapes: Using Original Land Surveys to Understand the Historic Distribution of Cane Brakes in Wayne County, MS
… insights into the distribution of cane brakes, revealing that<em> A. gigantea </em>possibly represented up to 44% of the surveyed landscape, likely second only to<em> Pinus palustris</em> (longleaf pine).</p> <p>This research involved digitizing historical surveyors' notes, transcribing …
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ADVANCED PHOSPHORUS BASED MIGRATION RESISTANT ANTI-OXIDANTS FOR CARBON-CARBON COMPOSITE AIRCRAFT BRAKES WITH INCREASED CATALYTIC OXIDATION RESISTANCE
Carbon-carbon composite brakes are one third the weight of typical steel brakes, and they attain strength and frictional properties at temperatures up to 1600°C. C/C composite brakes can endure high temperatures, but in the presence of oxygen they will begin to oxidize at 400°C. Anti-oxidant …
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Dynamic Modeling and Lateral Stability Analysis of Long Combination Vehicles
… The detailed models of pneumatic disc and drum brakes in LCVs, including the airflow delay and thermal characteristics, are also developed and are coupled with the articulated vehicle dynamic models. The disc and drum brake braking performance are evaluated and compared in straight-line braking …
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Finite Element Analysis of Thermal-Mechanical Instabilities in Nonmetallic Friction Composite Material
… contact. The topic has been extended into brakes and clutches which are two of the most common sliding systems most susceptible to thermal buckling and thermoelastic instability (TEI), where thermal buckling and thermoelastic instability are two sub-categories of thermal-mechanical …
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A precision autonomous parachute delivery system
… conducted to evaluate flight performance in deep brakes, for eventual use in autonomous accuracy landing approaches for targets two meters in size or smaller. Numerous design improvements were evaluated and/or implemented, and additional improvements are suggested. Using the implemented system, …
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Sliding Mode Controller Design for ABS System
… function of the friction brake, electromagnetic brakes work in a relatively cool condition and avoid problems that friction brakes face by using a totally different working principle and installation location. By using the electromagnetic brake as supplementary retardation equipment, the friction …
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ENHANCEMENT OF HIGH-SPEED FLYWHEEL ENERGY STORAGE VIA CARBON-FIBER COMPOSITE REINFORCEMENT
… energy that is currently being lost at the wheel brakes of an aircraft due to the high temperature developed in the brake stack as a result of landing, frequent brake applications during taxiing in or out of heavy traffic airports and rejected take-off. Lamina and laminate mechanical properties of …
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Control strategies for blended braking in road vehicles. A study of control strategies for blended friction and regenerative braking in road vehicles based on maximising energy recovery while always meeting the driver demand.
… otherwise be dissipated as heat through friction brakes to the environment. This research investigates the control of braking for a mixed-mode braking system in a these vehicles based on the proportion of braking energy that can be stored. Achieving mixed-mode braking requires the ‘blending’ of …
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Design and development of an extended range electric bywire/wireless hybrid vehicle with a near wheel motor drivetrain
… In addition, by-wire throttle and by-wireless brakes in a servomechanical fashion have been developed. The by-wireless braking system is used to control regenerative braking for the rear of the vehicle only allowing for the front brakes to be the primary means of braking as well as a mechanical …
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Development of a Heavy Truck Vehicle Dynamics Model using Trucksim and Model Based Design of ABS and ESC Controllers in Simulink
… dynamics. The tractor was equipped with disc brakes and the trailer was equipped with drum brakes. Model validation was by performing various dynamic maneuvers like J-turn, double lane change, decreasing radius curve test, high dynamic steer input and constant radius test with increasing …
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A comparison of bi-directional disc brake rotor passage designs
… of automobile safety is the braking system. Disc brakes have been widely used in automobiles for sped retardation for over 30 years. During that time, they have developed from a simple disc to a complex disc with channels, vanes, holes and grooves. The stopping capability of disc brakes is …
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Thermo-Mechanical Instabilities in Next-Generation Friction Materials in High-Speed Sliding Systems
… for efficient use of the friction material in brakes and clutches.</p> <p>Furthermore, to tackle instabilities like vibration and noise in automotive disc brakes and clutches, a viscoelastic friction material was proposed as another alternative. A mathematical model was developed to examine the …
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PROTECTION OPTIMIZATION OF CARBON-CARBON COMPOSITES AGAINST AIR OXIDATION BY COATING WITH ANTI-OXIDANTS
… PROTECTION OF CARBOB-CARBON COMPOSITES DISC-BRAKES MATERIAL BY COATING WITH ANTI-OXIDANTS) Developing glass enhancer mixture solutions (Ki’s), which promote the formation of a stable glass layer, homogenous clear liquid solution, and low viscosity liquid form, are easy to apply, and …
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Experimental Evaluation of Roll Stability Control System Effectiveness for A-double Commercial Trucks
… or understeer, ESC automatically activates the brakes at the correct side of the steer and/or drive axle(s) to regain steering stability. ESC, however, often cannot sense the likelihood of trailer rollover in multi-trailer articulated heavy vehicles because of the articulation between the …
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