Dear Team, I am writing my master thesis in a company on aerospace and its applications. We are currently working on MEMS sensors and I have a tool to run the performances of MEMS sensors based on the specifications and a model that has been developed. I am currently on analysing the performance of Bosch accelerometer and gyroscope products. Based on my model and definitions, I am currently having a few confusions with the data sheets for the sensors. I will ask for both accelerometer and gyroscope. They will be like in the following; Questions for BMG160 gyroscope; 1) I see on the data sheet that the ‘senstivity’ value has a unit of LSB/°/s. Is this parameter corresponding to scale factor, as an effect on the input/output ratio of the device? If so, how can I convert this to a unit of %(divide by 8 maybe?)? If not, which parameter value shall I use as a scale factor for my calculations available in the data sheets? 2)I see ‘cross axis sensitivity’ parameter. Is this parameter the same thing with the non-orthogonality of the 3-axis? If not, can I have a detailed definition for that parameter? 3)On the data sheet, I can’t see the misalignment error of the sensors(3 gyroscopes). Is this error considered on the model or is it given as a different parameter or calculated differently? My main consideration is to distinguish the non-orthogonality of the 3 axis measurements and the misalignment of the 3 different sensors because I have different parameters for both in my model. Questions for BMA400 accelerometer; 1)Similar to the above case, which parameter shall I refer to as the scale factor? 2)What exactly is the ‘Alignment Error’? 3)Why is the unit for the non-linearity ‘%’ ? Shouldn’t it be a function of the true acceleration? 4)Also similarly to the above case, is there a term for the misalignment of the sensors (with respect to each other) in the sheets? The documents I am referring are BST-BMG160-DS000-09 revision 1.2 and BST-BMA400-DS000-02 revision 1.1 . Thank you for your time and I am looking forward to hear from you soon. Cheers,
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