tailieunhanh - New trends and developments in automotive industry Part 2

Tham khảo tài liệu 'new trends and developments in automotive industry part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 20 New Trends and Developments in Automotive Industry Fig. 5. Sting support system left and truck setup in the test section right LLF has two standard support systems Fig. 4 and 5 A sting support system to which models are mounted via an internal balance. This is mostly used for aircraft and helicopter testing but is also necessary for cars in combination with the moving belt moving ground plane An external under-floor platform type balance with a model support by pads or special adapters. This is mostly the primary choice for cars and trucks 3. Force and moment measurements Two test sections of 20 m length each are suitable for automotive testing at DNW. Full-scale cars and vans are often tested in the 8x6 closed test section where up to 400 km h wind speed can be reached. A car platform with adjustable pads is linked to an external underfloor balance for the measurement of six stationary load components . drag side force lift and the moments in roll pitch and yaw. The platform can be used in combination with a tunnel floor boundary layer control system which injects pressurized air into the sublayer upstream of the test vehicle to improve the road simulation conditions and can be used in both test sections. A sting system for internal balance six-component supported cars can be used in combination with a moving belt system for perfect road simulation and rolling wheels. Full-scale trucks and buses use the closed test section where the maximum wind speed of 200 km h is more than enough. A truck platform is available in combination with loose air cushion elements to support the large and heavy vehicles. This setup provides three stationary load components . drag side force and yawing moment by means of the external underfloor balance. The external balance EXB is a six-component platform balance equipped with three horizontal load cells with a resolution of N and three vertical load cells with a resolution of N. This balance is .

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