The article brings a brief revision of the two-degree-of-freedom (2-DoF) internal model control (IMC) and 2-DoF Smith-Predictor-based (SP) unstable systems. It shows that first important reason for distinguishing between these approaches is limitations action. However, it also reminds that, in addition to seemingly lucrative dynamics transients, proposed can conceal tricky behavior with structu...

Inspired by the cactus in nature, a cactus-like cross-sectional structure was proposed to achieve VIV suppression. The of elastically mounted cylinder realized based on ANSYS Fluent and User Defined Function (UDF). dynamic motion solved single-step time integration algorithms Newmark-β method. in-house code first validated studying 2DOF circular with small mass ratio over range U*=2~13, results...

Numerical simulations are carried out to investigate the vortex-induced vibrations of a two-degree-of-freedom (2DOF) near-wall rotating cylinder. Considering effects gap ratio, reduced velocity and rotational rate, amplitude response, wake variations fluid forces analyzed, with Reynolds number 200 mass ratio set 1.6. The correlative mechanism in wake–hydrodynamics–vibration is revealed. results...

Lane keeping control technology can improve driving safety. But the direct torque, caused by four in-wheel motors of an electric vehicle driven (EV-DFIM), will affect lateral stability. For solving this issue, a two-degree-of-freedom (2DOF) dynamic model EV-DFIM lane system is constructed to obtain stability state equations. Then homogeneous domination-based observer and output feedback control...

Energy harvesting is a useful technique for various kinds of self-powered electronic devices and systems as well Internet Things technology. This study presents two-degrees-of-freedom (2DOF) electromagnetic energy harvester that can use environment vibration provide small devices. The proposed consists cylindrical tube with two moving magnets suspended by magnetic spring mechanism stationary co...

The demand for safer vehicle transportation and future automated vehicles will open the possibility implementation of steer-by-wire (SbW) steering system. Application this system would not be exclusive only front axle, but rear axle as well. Current four-wheel (4WS) systems are designed applied using Ackermann geometry. Due to designs requirements, an ideal geometry is never achieved kinematics...

In most real-time industrial systems, optimal controller implementation is very essential to maintain the output based on reference input. The design problem becomes a complex task when system model greatly non-linear and unstable. proposed research aims finest PID for unstable Magnetic Levitation System (MLS) using Harris Hawks Optimization (HHO) algorithm. MLS highly electro-mechanical hence ...