SBG Systems Ellipse Series Operating Handbook Download Page 13 | Manualshive

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Ellipse

– Operating Handbook

ELLIPSEOHAIR

Calibration result examples

On the following screen-shots, it is possible to see that the calibration coverage is not a full 3D
sphere but covers significantly different orientations. The first screen shows an example of the
calibration procedure explained above. The second one shows a calibration only performed with
a simple “8” performed.

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Summary of Contents for Ellipse Series

Page 1: ...pse AHRS INS Use in airborne applications Operating handbook Document ELLIPSEOHAIR Revision Jun 30 2020 Support EMEA 33 1 80 88 43 70 support sbg systems com Americas 1 657 549 5807 support sbg systems com ...

Page 2: ...s Nevertheless in case of highly vibrating environment an efficient mechanical vibration isolation is required for proper operation Silicon dampers can be used for that purpose Ellipse placement in the aircraft The vehicle coordinate frame is defined as follows X axis points to the front of the aircraft Y axis points rightward Z axis points downward The Ellipse MUST be mechanically aligned with th...

Page 3: ...o the Ellipse It should have a clear view of sky The GPS lever arm is the signed distance expressed in the vehicle coordinate frame from the Ellipse center of measurements to the GNSS antenna It must be measured within 5cm accuracy In addition this lever arm should be lower than 10m for best performance Note If the Ellipse is not aligned with the aircraft lever arms are still taken to the referenc...

Page 4: ... sky when mounted on the vehicle Both antennas must be placed on a ground plane typically the aircraft s roof or wings horizontal bars more than 10cm away from the ground plane s edges Once installed the main GPS antenna lever arm must be measured It is the signed distance expressed in the vehicle coordinate frame from the Ellipse center of measurements to the main GPS antenna It must be measured ...

Page 5: ... low level communication protocol Note At the first access the Ellipse will have its default configuration This data output configuration should be used it you want to send logs to Support Don t hesitate to contact the Support Team for help Sensor Motion Profile For airborne application several motion profiles are available Airplane 5 13 ...

Page 6: ...Ellipse Operating Handbook ELLIPSEOHAIR Helicopter Rotary Wing UAV 6 13 ...

Page 7: ...tomatically computed Initial Position and Date This parameter will matter if you are using magnetometers the initial position and date will be used to compute the magnetic declination In case you use magnetometers as a heading source then a magnetic calibration is mandatory A 3D calibration should be preferred over a 2D one if possible If a 2D magnetic calibration is performed it will be only vali...

Page 8: ...ally set to Internal by default to select the on board GNSS Receiver In addition they accept In case the Internal GNSS Receiver is selected the user can also set an RTCM corrections input on any available serial port Other Aiding Inputs You can enable Air Data aiding input for airborne application in case you have such external sensor available Please note that Odometer is for Automotive applicati...

Page 9: ... 1 2 cm or estimated by Qinertia you can check the Primary antenna Lever arm has been measured precisely box This will optimize Kalman filter warmup time and overal performance 3 Select Rough lever arm if you measured it within 5cm accuracy If precisely measured or estimated by Qinertia you can select precise lever arm to optimize filter warm up time and performance 4 Automatic rejection mode is a...

Page 10: ...main point is to cover the whole flight profile but a larger amount of points beyond the flight profile will provide even better results 4 Press Calibrate and check calibration results Press OK to finalize the calibration procedure 5 Power cycle the sensor if you need immediate operation after calibration Airplanes helicopter and large UAV applications In flight 3D calibration This calibration wil...

Page 11: ...s Procedure tested on a private airplane The following procedure has been tested with success on a piston private airplane The calibration starts in a steady flight Two 360 turns will be performed decomposed in the following steps Step 1 Calibration Start Press start acquisition button 1 High bank right rolling without turning 2 High bank 120 left turn Step 2 1 High bank right rolling without turn...

Page 12: ...e 2D calibration method The procedure is really simple and only requires a few steps on the ground to be performed 1 Install the sensor as described in previous sections and place the whole system away from external magnetic disturbances buildings other vehicles etc 2 Place the aircraft on a horizontal platform The aircraft must be kept horizontal in its line of flight level This is the case with ...

Page 13: ...n shots it is possible to see that the calibration coverage is not a full 3D sphere but covers significantly different orientations The first screen shows an example of the calibration procedure explained above The second one shows a calibration only performed with a simple 8 performed 13 13 ...

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