Accelerometer for missile guiding systems / 加速度導彈導向系統
The latest defensive technologies rely heavily on the use of long-range
artillery. As such, it’s mandatory that the use of these systems doesn’t present
a high risk of civilian casualties. In order to combat this risk, modern
artillery systems, smart munitions and small missiles require precision,
accuracy and the ability to operate independent of GPS control. These types of
projectiles have to integrate independent and reliable self-destruct mechanisms
using sensors such as accelerometers. Not only do the accelerometers used in
these systems have to perform after the initial shock, but they also have to
perform after impact, allowing the weapon to self-destruct or render itself
inert as to prevent civilian casualties if the target hasn’t been eliminated.
Shock resistance
The deployment of guided munitions generates high levels of shock, which is
defined as an extreme acceleration characterized by amplitude (usually measured
in g), time (usually measured in m/s) and profile (usually half a sine). As
such, gun-hard accelerometers for inertial applications have to survive
increased levels of shock while still providing stability and accuracy after the
initial shock.
The MEMS revolution
MEMS accelerometers are robust and cost-effective, presenting an inherent
tolerance to high shock values. Sensors have been centrifuged up to 40.000 g
without any degradation. Moreover, the materials used for making the
accelerometer have to isolate and reduce vibrations, preventing balloting shock
during gun-hard shock as well as any level of vibration from exerting
potentially harmful resonances within the structure of the sensor.
Colibrys MEMS accelerometers for Missile Guidance Systems
Colibrys has successfully developed a unique solution for applications requiring
inertial-grade specifications combined with gun-hard survivability and
exceptional post-shock stability. The Colibrys HS8000
family of MEMS accelerometers
offers long-term stability in terms of bias and scale factor, very high shock
survivability and an integrated temperature sensor. It is available in ranges
+/-30 g and up to +/- 100g and serves as a cost-effective solution for missile
guidance systems.
The product has been extensively tested both as a standalone accelerometer and
in IMU formation, with post-test results confirming the sensor’s mechanical
ruggedness and high sensitivity under harsh conditions typical to missile
deployment.
| 
