Vehicle aircraft systems require the complex design and installation of test rigs and in test aircraft. Saab uses 3D data created with CATIA in Dymola – both from Dassault Systèmes – to model and simulate the function of its vehicle systems, reducing the risk that design errors will remain undetected until late in the development process.
“Our biggest challenge is producing aircraft as efficiently as possible without increasing development costs,” said Ingela Lind, PhD, Technical Fellow at Saab. “This is why we use model-based development; it enables us to fully understand the benefits and limitations of the vehicle systems, how they interact with one another, and how to fit them together.”
Saab’s most recent project involves using 3D CATIA data of fuel tanks in Dymola for real-time simulation. “The fuel-level reading of the tank depends on the orientation of the aircraft and the g-loads, which causes fuel sloshing in the tank while the plane is flying,” Lind said. This needs to be taken into account when reading fuel sensors to determine the amount of fuel left in the tank. “With Dymola, we are studying the type of design adjustments that would need to be made to the tanks and sensor placements to get the most accurate fuel readings to the pilot and to ensure fuel feed to the engine in all flight conditions,” she explained. “It is an interesting application that combines the 3D world with systems simulation.”
消费者需要省油的汽车，政府法规标准要求生产低油耗低排放的环保汽车，为了实现这两方面的愿望，Ford Motor Company开发一种混合动力电动汽车(HEV)，一款Escape SUV，预计2003年投产。由于混合动力车具有不同的工作原理，(例如电动启动、主动空挡、再生制动等)，一个重要的问题是在每个工作模式当中以及在不同的模式的转换当中尽可能减少驾驶员能够感到的振动。为了搞清楚混合动力车的设计和控制指令对驾驶员"感觉"的影响，我们需要建造能够精确再现汽车传动系统动力学响应的模型。这样，一个给定的机械配置和/或控制器设计的响应能够得到评估。