TRANSIENT VIBRATION AND ACTUATOR CONTROL

The action of instant force causing shock/vibration in elastic bodies leads to a particular augmented response if their resonances are excited. In many problems, the resonance response is proportional to the time rates of change of applied force (“jerk”). Jerk reduction is especially important in problems where the actuator must move in short time with motionless initial and final states. Our numerical code employs an innovative algorithm that allows for significant jerk reduction without slowing actuator action. Implementation of our actuator control profile significantly improves performance with jerk reduction (red curve in picture below for residual vibration vs. traditional data in blue).

Residual vibrations.


Normalized jerk profile.

Corresponding control current vs. a normalized time.

 
 
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