Dear Mr. Sharma:
As with any vehicular suspension, passive systems work essentialy "as build", i.e., they have a mechanical configuration that is kept constant during operation and only answers to track irregularities. Think about a wheel connected to the carbox by a set of helicoidal springs and viscous (or friction) dampers.
Active suspensions feedback information in order to adapt the suspension behavior to different conditions. This may mean stabilizing the suspended load on a preset position, for instance. They have actuators (pneumatic or hydraullic) that couteract the track irregularities in order to shape the response of the suspended load.
A good introduction to the subject can be found in Prof. Simon Iwnicki's Handbook of Railway Vehicles Dynamics.
I hope this helps.
Regards,
Leonardo Baruffaldi
Dear Mr. Sharma:
As with any vehicular suspension, passive systems work essentialy "as build", i.e., they have a mechanical configuration that is kept constant during operation and only answers to track irregularities. Think about a wheel connected to the carbox by a set of helicoidal springs and viscous (or friction) dampers.
Active suspensions feedback information in order to adapt the suspension behavior to different conditions. This may mean stabilizing the suspended load on a preset position, for instance. They have actuators (pneumatic or hydraullic) that couteract the track irregularities in order to shape the response of the suspended load.
A good introduction to the subject can be found in Prof. Simon Iwnicki's Handbook of Railway Vehicles Dynamics.
I hope this helps.
Regards,
Leonardo Baruffaldi
Dear Sharma,
Active Suspension: Suspension properties can be altered depending upon the feedback from the sensors and gives a better ride quality.
Passive Suspension: Traditional, cheap and fixed configuration.
Leonardo's reference is quiet a good one.
Dear Sharma
Active suspension system is present when a controllable actuator force is present. This force is being a result of feedback loop calculations for the system controller. This is despite of the type of Actuator, Spring, Damper and control strategy being used.
Passive suspension: no added energy
Active suspension: added energy
Semi-active suspension: re-configurable passive suspension.
(This is a bit simplistic, but trustworthy nevertheless.)
- Badges
- Science topic