PI's Vertical Translation Stages With Magnetic Counterbalance Combine Dynamics With Nanometer Precision

The V-571.Z expands PI’s precision motion portfolio for photonics, semiconductor, optical alignment and metrology ...
IEEE

A Numerical Approximation Approach for Deriving Computational Efficient Inverse Dynamics of 6-DOF Parallel Robots Based on Principle of Virtual Work

Abstract: The inverse dynamics of the six degree-of-freedom (6-DOF) parallel robot (PR) presents an inherent complexity due to the closed-loop kinematic chains. To derive computational efficient ...
IEEE

Incremental Optical Encoder Error Modeling and Compensation for Accurate Speed Acquisition in Non-Stationary Conditions

Abstract: Instantaneous angular speed (IAS) signals are widely used in motor control and fault detection. However, incremental optical encoders inevitably suffer from engraving and subdivision errors ...
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The U.S. Refugee Re-Vetting Order Violates the Principle of Non-Refoulement

To comply with domestic and international law, the United States must rescind the re-vetting directive and restore the adjustment-of-status process for refugees already admitted, reaffirm the ...