Velocity through Accelerometer without Drift
Velocity through Accelerometer without Drift
(OP)
I’m making a project about Control and Optimization of the Electromagnetic Suspension Operation of a MAGLEV Vehicle.
In this, I need to measure inertial acceleration and make integration to get velocity of the Vehicle , but I’m having a PROBLEM WITH DRIFT.
I’m using the ADXL 105EB accelerometer to measure acceleration of the Vehicle in heave axis.
In the start, the Microcomputer with 12 bit A/D converter reads values of acceleration with 5000 Hz Sample rate by one minute and calculates the average (reference 0g).
The velocity is the integration of: reference 0g – acceleration in an instant. But after some seconds appear a drift in the velocity.
I’d like to know if would have some solution to measure this velocity without drift.
Thank you,
In this, I need to measure inertial acceleration and make integration to get velocity of the Vehicle , but I’m having a PROBLEM WITH DRIFT.
I’m using the ADXL 105EB accelerometer to measure acceleration of the Vehicle in heave axis.
In the start, the Microcomputer with 12 bit A/D converter reads values of acceleration with 5000 Hz Sample rate by one minute and calculates the average (reference 0g).
The velocity is the integration of: reference 0g – acceleration in an instant. But after some seconds appear a drift in the velocity.
I’d like to know if would have some solution to measure this velocity without drift.
Thank you,





RE: Velocity through Accelerometer without Drift
I suggest you use a velocity measuring device, or, measure displacements and differentiate.
Cheers
Greg Locock
RE: Velocity through Accelerometer without Drift
M
RE: Velocity through Accelerometer without Drift
RE: Velocity through Accelerometer without Drift
I recommend using a Bruel & Kjaer 2635 signal conditioner with a charge mode accelerometer.
This signal conditioner integrates the accelerometer signal. The output is a velocity signal.
The conditioner also performs a highpass filter of the signal prior to integration. This removes the drift.
All of these operations are performed on the analog signal. The output is thus an analog velocity signal.
Tom Irvine
http://www.vibrationdata.com