|
From: Martin S. <ma...@pl...> - 2001-06-17 21:13:05
|
Hello toghether, maybe one of you has some experience on this topic. I need a tilt sensor for a real world experimental plane project. An easy way to build this is using two accelerometers to measure earth gravity. One of these points down 45 degrees to the nose of the plane and one points 45 degrees to the back. If both show the same acceleration (1 g * (1/sqrt 2)) then my plane is parallel to the surface. If the one pointing towards the nose increases and the other decreases to the same amount, my plane has the nose down. That is proven to work. There's just one obstacle that prevents this configuration to work in a real environment: When the whole plane accelereates, then I also get an agle different to horizontal plane because the configuration is sensing the acceleration even when the pitch is still the same. If I had the money to buy a ready-to-go "Intertial Measurement Unit", then I would not ask. But for a plane whose first prototype is in model plane size, this would exceed the existing budget. Does anyone know how this is done in a real plane ? I don't believe the virtual horizon is showing strange pitch when the plane is acceleration on the runway :-) Thanks, Martin. -- Unix _IS_ user friendly - it's just selective about who its friends are ! -------------------------------------------------------------------------- |