طراحي سيستم ترمز ضد قفل و بازياب انرژي براي خودرو هيبريد الكتريكي

چكيده انگليسي :

Design of the Regenerative Antilock Braking System for a Hybrid Electric Vehicle Parisa Karami p karami@me iut ac ir Date of Submission August 5 2013 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Mohsen Esfahanian mesf1964@cc iut ac ir Abstract Environmental concerns and diminishing fossil fuel resources has forced the automakers to move toward reducing fuel consumption As of today the hybrid electric vehicle is the best choice that can satisfy this objective Hybrid electric vehicles HEVs use multiple sources of power for propulsion which provides great ease and flexibility to achieve advanced controllability and better driving performance One of the most important features of HEVs is their ability to recover significant amounts of braking energy Most hybrid electric vehicles employ both a hydraulic braking system and a regenerative braking system to provide enhanced braking performance and energy regeneration Therefor effective coordination between regenerative and mechanical braking systems and safe anti lock performance of these two is the most important part of the brake control strategy Design of such a control strategy that can coordinate both regenerative and hydraulic braking systems for a hybrid electric vehicle has not been addressed in previous studies In this study an integrated braking system for an electric hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor along with a separate hydraulic braking system is proposed In the described system four separate anti lock fuzzy controller with fuzzy logic strategy are developed to adjust the hydraulic braking torque in front and rear wheels Also an antiskid controller with this strategy is applied to adjust the regenerative braking torque dynamically In upstream control a central processor has the responsibility of coordinating the system The designed system is modeled on Honda Insight in MATLAB ADVISOR A vehicle with this integrated braking system is simulated in nine driving cycles The rules and membership functions of the fuzzy controller are optimized while considering SOC and the slip coefficient in the various road conditions as the objective functions Finally simulation is performed in a combined driving cycle and the performance of the membership functions and coefficients has been studied Antilock performance of regenerative braking system non interference performance of the regenerative and hydraulic braking system on the front axle design based on the maximum torque of the electric motor SOC monitoring calculating the velocity for four wheels and possibility of the simulation on the roads with different slip condition or cornering are all addressed in this proposed design The results show that combustion engine fuel consumption and braking loss is reduced while the amount of energy stored in batteries especially in urban cycles with high frequency and stopping and thus the overall system efficiency is increased The slip ratio remains close to the desired value and slip will not occur in the whole driving cycle Also the anti lock performance of the hydraulic and regenerative brake systems in sudden and severe braking conditions is evident At the end of the driving cycle combustion engine fuel consumption and braking loss are reduced The proposed braking control strategy can be considered as a safe anti lock and energy regenerative braking system Key words Regenerative and antilock braking system Antilock hydraulic braking Fuzzy controller the velocity for four wheels separately Regenerative braking PDF created with pdfFactory trial version www pdffactory com

كرمي، پريسا

طراحي سيستم ترمز ضد قفل و بازياب انرژي براي خودرو هيبريد الكتريكي

ترمز هيدروليك ضد قفل , كنترل كننده فازي , سرعت زاويه اي مجزا براي هر چرخ