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1	Vehicle dynamic validation and analysis from suspension forces Murray, William S. (William Scott) 21 March 2012 (has links) Several standardized courses for Formula SAE (FSAE) testing are introduced and described with sufficient detail to be reproduced by any Formula SAE team. Basic analysis methods for the courses are given as well as explanations of how those analyses could be used. On-car data from the Global Formula Racing (GFR) SAE cars is used to verify the analysis methods, give estimates to unknown variables, and show the relevance of the standard testing courses. Using the courses and methods described in this paper should allow standardized comparison of FSAE car performance, as well as provide a method to verify simulations and evaluate changes in vehicle performance from tuning. Instrumentation of all suspension member forces with strain gauge load cells is shown to be an extremely powerful tool for measuring vehicle performance and quantifying vehicle dynamic characteristics. The design and implementation of strain gauge load cells is described in detail to provide a template for reproducing similar results in other vehicles. Data from the GFR 2011 FSAE car is used throughout the paper to: show the design process for making effective suspension member load cells, show the calibration processes necessary to ensure quality data is collected, illustrate the calculation of suspension corner forces, and show the effectiveness of measuring vehicle dynamic characteristics with this technique. Using the methods described in this paper should provide data that allows a more complete and thorough understanding of on-car vehicle dynamics. This data may be used to validate vehicle models. / Graduation date: 2012 Formula SAE Society of Automotive Engineers Racing Strain Gauges Vehicle Dynamics Test Courses FSAE Global Formula Racing GFR Data Acquisition Asymmetric Oval Tire Forces Vehicle Yaw Momnet Milliken Moment Diagram Vehicle Validation Vehicle Instrumentation Automobiles, Racing -- Dynamics
2	Řízení samoobslužných dveří a vzduchového pérování městského autobusu pomocí sběrnice CAN / Control of Passenger Operated Doors and Air Springs of Town Bus by means ofCAN-bus Sláma, Michal January 2009 (has links) The Diploma thesis is divided into 2 parts. The first one deals with the description of CAN-bus and the protocol of SAE J1939. The second part contains the practical solution to controlling of Passenger Operated Doors and controlling of Air Sprinte (ECAS). Both parts refer to contemporary (conventions/standards) and the whole task is solved in a new program environment KIBES-32.
3	A fundamental approximation in MATLAB of the efficiency of an automotive differential in transmitting rotational kinetic energy Vaughn, James Roy 30 July 2012 (has links) The VCOST budgeting tool uses a drive cycle simulator to improve fuel economy predictions for vehicle fleets. This drive cycle simulator needs to predict the efficiency of various components of the vehicle's powertrain including any differentials. Existing differential efficiency models either lack accuracy over the operating conditions considered or require too great an investment. A fundamental model for differential efficiency is a cost-effective solution for predicting the odd behaviors unique to a differential. The differential efficiency model itself combines the torque balance equation and the Navier-Stokes equations with models for gear pair, bearing, and seal efficiencies under a set of appropriate assumptions. Comparison of the model with existing data has shown that observable trends in differential efficiency are reproducible in some cases to within 10% of the accepted efficiency value over a range of torques and speeds that represents the operating conditions of the differential. Though the model is generally an improvement over existing curve fits, the potential exists for further improvement to the accuracy of the model. When the model performs correctly, it represents an immense savings over collecting data with comparable accuracy. / text Differential Automotive Automobile Final drive Gear Windage Bearing Seal VCOST Fuel economy Efficiency Powertrain Drivetrain Power train Drive train Model MATLAB Light-duty Heavy-duty Dual differential Tandem axle Tag axle Lubricant ATF Automatic transmission fluid Society of Automotive Engineers Walther Sutherland Wheel drive Transaxle Thermal/fluid sciences TFS TxDOT Texas Department of Transportation

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