Almost all products of competitors are just a combination of 3-axis accelerometer and gyros and output only acceleration and angler velocity. Our IMU can also output attitude angle by using know-how of inertial navigation cultivated in aircraft business.
These effects can be reduced by “pure inertial calculation (calculation using only gyro signal)” which makes the specific gravity of acceleration/deceleration small. However the error will expand with long term use being influenced by drift of gyro.
In case of the inertial measurement unit, we basically use integrated value of gyro for dynamic change of attitude angle and accelerometer is used for static change of attitude angle. The advantage in using integrated value of gyro is to be unaffected by acceleration components which are produced by dynamic motion.
Since the switching to “pure inertial mode” requires rewriting of leveling time constant and operation check, it is necessary to send us back the unit.
Regarding the cost for switching work, please contact us.
No, it changes. Since the attitude angle is calculated based on the gravitational acceleration, the error occurs under the influence of acceleration components other than gravitational acceleration during sudden turn, acceleration and deceleration.
There is some method to decrease the error but it is not possible to completely remove it.
Static angle accuracy is:
– Roll and pitch: 0.5 deg rms (at room temperature, after warm-up)
– Yaw: 0.02 deg/s rms (within 5 minutes after offset cancel)
The position error is not specified because it becomes big when the IMU independently used and is different depending on the operating condition.
Please restart after sending the command.
– $TSC, COM, 115200, 8, NO, 1*26 (Change to 115.2 kbps)
– $TSC, COM, 57600, 8, NO, 1*15 (Change to 57.6 kbps)
The baud rate can be decreased by the command above but 200Hz communication becomes unavailable. In case of 57.6 kbps, 100Hz is the maximum.
For AU7595 and TAG264 series, ON/OFF can be switched by mounting or unmounting of jumper pin on the circuit board.
Regarding AU7554 and TAG250 series, please return the product back to us because the mounting or unmounting of fixed resistance on the circuit board is necessary. Please also contact us for the cost estimation.