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https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/908cd059-2389-4d2d-8820-2330c21db8ad/PXL_20210423_014910408.jpg personal projects https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/cfb418fb-c7eb-46d4-a759-8db7d51d9678/PXL_20201201_162657055.jpg personal projects https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/7c2bf402-d548-43e4-8231-6a833ceaf74b/Lense_1.jpg personal projects https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/cf2097b5-3c26-4d83-a651-c7036c1aa7eb/asdf.png personal projects https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/c6ac098b-7542-45df-9c1a-bd6d61285a00/Lense_2.jpg personal projects https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/bbd5790e-cc75-437e-9188-98158b266a0c/PXL_20201202_214318276.jpg personal projects https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/0a65538c-24ef-44bc-b655-e6b2d7b5c363/Lense_3.jpg personal 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Note the shutter's magnet in the RH side of the picture. https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/fdd6b3d5-3521-4f86-9c2d-29dc3c4386a7/TRIAL_5+%281%29.jpg personal projects https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/02af0d82-0f5d-48bb-b172-ac9cdd593032/DSC_4833++2X3.jpg personal projects Scanned film. Note the trails of a car driving down the street. https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/8f61b7be-28f5-41d8-8ccc-fda1ae21bea9/DSC_4842++2X3.jpg personal projects Scanned film https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/927acd83-4f50-450b-8f75-18c8bf41f3a7/IMG_20200903_171042.jpg personal projects Camera with shutter open. Due to long exposures, did not need a fast mechanism. https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/094e2885-9236-492e-8459-cb1aad2b78f1/IMG_20200903_171054.jpg personal projects Camera with Shutter Closed https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/c0c7cda4-7088-4f4f-a38e-e03030a8af10/2021-04-22+18_32_25-Pinhole+Camera+handcalcs+-+Google+Sheets.png personal projects Handcalcs for sizing Pinhole https://www.markokaufman.com/contact-1 daily 0.75 2021-04-21 https://www.markokaufman.com/thesis daily 0.75 2021-05-02 https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619137866855-63R56V2AUGNALEFQOORX/kus.PNG thesis - What is Understeer? If =0, the car is considered a neutral steer configuration. This is a marginally stable condition where both the front and rear tires loose have equivalent slip angle. A car has understeer when >0 and occurs when the front slip angle is greater than the rear. For the driver, this feels like the car is pushing through the corner and more steering then neutral steer is needed to achieve the same turning radius. Oversteer occurs when the rear slip angle is higher than the front slip angle, <0. When the car is in an oversteering condition, less steering angle is needed then a neutral car. This is also an unstable condition where a controller must actively actuate the steering and/or throttle to maintain stability https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619138445733-SIAZKBTHGMILYCIFMHRS/turning+radius.PNG thesis - How Rear Steer can control Understeer Understeer can be effected by many different things. One of the main items is the CG (center of gravity) positions in the car. This changes the weight distribution and the lateral force generated by the tire. For example, if a company has a model of car with 2 variants with different CG and/or mass, this will influence the understeer behavior of the car and thus change the feel. By modifying the turning radius (R_kinematic) the understeer is also effected. Therefore, rear steer can be applied to control the cars to have the same understeer gradient by effectively canceling the effects of the different mass/CG position. https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619139005943-MV7SXGFPY5S7XLDYS7N4/results.PNG thesis - There are three main conclusions that can be drawn from this thesis. First, Active Rear Toe is a viable method for dynamically changing the handling characteristics of a vehicle in real time. Second, a nonlinear controls approach, such as sliding mode control is necessary for effective ART control. The simulations showed a non-gain scheduled PID approach was not effective. Third, the understeer gradient is commonly used to discuss handling characteristics but was a very sensitive parameter to control directly. Lateral acceleration was found to be a much easier parameter to control, and because of its direct effect on the understeer gradient, it was still able to control Kus. https://www.markokaufman.com/portfolio daily 0.75 2022-10-23 https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619107217164-0LKGZLTZE47P8HE7B31P/0x0-ModelS_04.jpg Portfolio Tesla Work (5 Internships and 2017-2021) https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/0596683a-0cbd-42ba-b7e2-f6865ab7351e/carbon_lattice_glam_shot.jpg Portfolio Carbon (2021 - Present) https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619141884208-6YBL4EEKZBJIOXX5E351/Simulink.png Portfolio Masters Thesis https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619108705438-J3N5X1QPX64KB9KAHUVQ/IMG_8596.jpg Portfolio ERAU Motorsports Formula SAE https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/8f61b7be-28f5-41d8-8ccc-fda1ae21bea9/DSC_4842++2X3.jpg Portfolio Personal Projects and Photo Gallery https://www.markokaufman.com/contact daily 0.75 2021-04-21 https://www.markokaufman.com/tesla daily 0.75 2022-12-08 https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619890703481-Q2HTNVQSFWGRDH2FBWHD/4paKRCSoC3bGvb032fAczlh9veCYiQPbvNVaVqWt71wNSBXI7g5_CZFDqh6MHGfdbIv3IzEtwHH0TJJKeBkXL5_sYqhvd3gyN9q7qwua2-NLRCNBV5QBBvHlL9YHi76cqGObt8rdusQm8LfzHwx43cIUV3_e_mWQnU-lwLYMwzMLOF66mCYfINFTtWmiKlbU.png https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/9ce55b90-470c-499c-b94c-4a729bf163cd/Plaid+Knuckle+updated.jpg https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/562a0d84-b019-4db8-84fa-2630d9ce7164/Plaid+lwr+fore.png https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/2694efb6-2157-4ee2-9f2b-5daa7a069c9a/Plaid+upper+aft.jpg https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/2304277d-223a-44da-b32b-9304ef6eae02/2022-10-22+14_49_00-f-bqnl7ZcIrjXBtK.jpg_large+%281280%C3%97720%29.png https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/ddc833e2-4878-4e30-b636-9db8b11c8d9d/plaid+rr+toe+updated.jpg https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619890139822-V24TAW0VE3UZL8UZU1QP/OfHzmJbJGKFcZfJ7wVXBQKuikd4VQQrmVNaGJAxvXXQ8zVDZthPGOy4fw7BwrA5fvRuHo7PjEaSw4-YWkgJL-S3DXOywgQgtpjPpXHOH8sb9yhdVgsbKpoGLAg7ZGnZnV0qJInxEy8pe0mZNpqA8T6ABWR1vlAPcTnM26RgEaMciwa6UiYK_G5t7FQczwsme.png https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619825125807-VNEYG0M8OAQ2SCJASRUZ/charge+port.png https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619897443592-EKMP0WSJHCAX553QPKUU/tesla-semi-4-drivetrain-electric-motors.jpg https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619892547929-NTP9H2IS68YAS5HD8LTX/RR+knuck%3Be.png https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619823154127-SUW7DH5S8DFG9L3YQPBD/uber.png Tesla - Chassis-Dynamics Summer 2015 and Summer/Fall 2016 Designed wheels and interfaced with Class A surfacing and other teams Developed packaging and design specifications for active rear toe system Designed and tested prototype components to allow for an accelerated build schedule Conducted testing for the design specification of snow chains Designed rear knuckle for mass production using topology optimization Performed Simulink simulations of steering system to improve the dynamics and feel Instrumented cars and tested for various driving and autopilot scenarios Contained and implemented countermeasures for MFG concerns during initial production https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619147248663-GVRXXSI9IY4TVK4AYG9Z/Tesla-checking-fixture.jpg Tesla - Quality Control and Metrology - Stamping Summer and Fall 2014 Designed CMM check fixtures for body in white components Contained production quality issues and implemented solutions to prevent recurrence https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619147053588-AECXS0SQWCJV2QISDQCH/Door.png Tesla - Closures Engineering Summer 2013 Designed initial concepts for Model X Falcon Door upper section Developed sealing concepts for closures systems https://www.markokaufman.com/home daily 1.0 2022-10-23 https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1618416064376-THCHG47B3KDEE7F2V8WI/image-asset.jpeg https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/b95df918-6efb-4f3f-8027-08a7c7267da8/2022-10-22+14_49_00-f-bqnl7ZcIrjXBtK.jpg_large+%281280%C3%97720%29.png https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/5bc18b86-d031-453a-b08e-5fdf70b0135e/carbon_L1_printer_environment_shot.png https://www.markokaufman.com/fsae daily 0.75 2021-05-02 https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619127164205-BLPIM2YD24JG5D77SSHG/Simulink.png fsae https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619126639195-IHXM4HUKZU1AQMSZ7DDE/temp-grip.png fsae https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619126790077-6DCKI54KVF9820BHNJ0R/tabular+model.png fsae https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619127770304-WBQOWRYZVKVCSKOSZO4X/Front+Corner+Cross+Section.png fsae https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619128236950-UR0UYO9XUV8IDJEZYL8Q/wheel%2Bcenter.jpg fsae https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619127508183-PLBXA720XVCUCUNAQ6AA/Suspension+CAD.png fsae https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619128650332-4OGYX27S22DIPS4S6HVL/Knuckle+Laser.png fsae https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619129450578-BB27RHRWN1R7OCFE121C/IMG_20160205_213714274.jpg fsae https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619130156192-OILT66R0XCCGJJA8YOFL/IMG_20170428_133415.jpg fsae https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619130876171-BK6PWMG43C5GW4BMAUYL/knuckle+issue.png fsae RR spindle after half shaft failure. Root cause was out of spec half shaft angles causing a tripod failure. https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/1619130428852-0TS9YC3TLZGX5Y260CST/IMG_20160118_183322108.jpg fsae Weld strength testing for alternative light weight tubing diameters. We needed to prove we are just as strong as a traditional frame. https://www.markokaufman.com/carbon daily 0.75 2022-10-23 https://images.squarespace-cdn.com/content/v1/60770c9b190c133ff5b82f99/e483c99f-4bf6-4123-a10b-bc59eb190482/lablanc.jpg https://www.markokaufman.com/get-started daily 0.75 2021-04-15 https://www.markokaufman.com/get-started/p/relationship-with-others-wclc8 monthly 0.5 2019-07-05 https://images.squarespace-cdn.com/content/v1/5ced8e1d5fd4c700018dd761/1560189982811-KFAJF1TCUH1SXZ827UMC/Stocksy_txp824ffa5crXt000_Large_844923.jpg Get Started - Relationship with Others https://www.markokaufman.com/get-started/p/relationship-with-you-kcr8n monthly 0.5 2019-07-05 https://images.squarespace-cdn.com/content/v1/5ced8e1d5fd4c700018dd761/1560189874730-3B0TSLDUHTQ93497V3L8/Stocksy_txp824ffa5crXt000_Large_844934A.jpg Get Started - Relationship with You https://www.markokaufman.com/get-started/p/relationship-with-youothers-p2f2m monthly 0.5 2019-07-05 https://images.squarespace-cdn.com/content/v1/5ced8e1d5fd4c700018dd761/1560190004400-XTA0DF0S9WOZJUG994C8/Stocksy_txp824ffa5crXt000_Original_845035.jpg Get Started - Relationship with You+Others