Nathan Lodenís Magnetic Levitation experiment started with the basic problem of stabilizing a frictionless position control loop with inherent metastability. A fast controller with phase-lead compensation took care of that. Then he discovered a strange phenomenon: The levitated object begins and continues oscillating in rotation about a vertical axis. Explanations have been proposed and discussed, but they remain theories. Can you reproduce his result and discover the cause? The apparatus consists of a wooden frame, a bolt with a coil, a power transistor, an infrared emitter and detector, a few op amps and passive components.
As manufacturers add new technologies to their products, designing for compliance becomes more difficult.†Prepare for the certification testing process. Otherwise, you increase the risk of discovering a safety issue after a product leaves the assembly line. That will†cause significant time-to-market delays,†be much costlier to fix, and damage your brand in the eyes of customers.†
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