... with a supplementary electromagnetic actuator located outside the rotor bearing span. Feedback and feedforward control system design are shown, and comparative experiments on two active vibration control methods for mass unbalance compensation are reported. The methods compared are adaptive FIR filter with the least...

... and electromagnetic actuators. The cantilever beam acts as the moving mass, vibrating at the projectile roll frequency to generate control force. First, a dynamic model is developed to describe the system. Then the natural frequency, damping ratio, and length of the beam are varied to study their affects on force...

... with a damped oscillator used to quantify loads under a time varying magnetic field. Disturbance forces along the actuator are given by F d , and the control input is u ( t ) . 30 08 2007 08 12 2008 29 04 2009 control system synthesis electromagnetic...

... condition is implemented to restrain uncertainties. Compared to a traditional closed-loop control design, the proposed algorithm experimentally showed a greatly enhanced performance. 20 11 2003 07 09 2007 09 04 2008 control system synthesis electric current control electromagnetic...

.... The surface of a spacecraft antenna can be reconfigured to optimize throughput and held in position for years. Shut-off dampers in HVAC ducts can be held open throughout a season. electromagnetic actuators permanent magnets electromagnets 01 August 2001 01 August 2002 10 03 2003...

... by an experimental validation of the findings using a single-degree-of-freedom primary structure and an absorber with electromagnetic actuator. Both analytical and experimental results show that the DR and PD implementations can be equally effective in suppressing undesired oscillations. The latter, however...