Найдено научных статей и публикаций: 1, для научной тематики: Magnetic bearings Biased magnets Genetic algorithms Design optimization
1.
Rao, Jagu S. and Tiwari R.
- Mechatronics , 2009
Integration of the geometric and control designs in conjunction with the optimization is the current trend
in mechatronic products. In the present work, an optimal design methodology of double-acting hybrid
active magnetic thrust bearings has been proposed. Double-acting actuators and controller are...
Integration of the geometric and control designs in conjunction with the optimization is the current trend
in mechatronic products. In the present work, an optimal design methodology of double-acting hybrid
active magnetic thrust bearings has been proposed. Double-acting actuators and controller are optimized
as a unified system. Conventionally, in control of rotors in the axial direction using double-acting magnetic
bearings, two identical bearings are used. However, in the present design two different bearing
geometries with different operating parameters have been considered. Minimization of the powerloss,
the weight, the control input and dynamic performance indices and maximization of the load capacity
have been considered as objectives. The design considers the 10 geometric, two electrical, and two control
design parameters. The constraints are classified into three categories, namely the geometric, electrical,
and control constraints. Real coded genetic algorithm has been implemented to carry out the
constrained multi-objective optimization of the present problem. The convergence and Pareto-front
spaces are studied by using different populations of sizes run for different generations. Some of the convergence
criterions have been observed for actuator–controller systems. Designs which are nearest to the
utopia point in Pareto-front fronts are compared. Air gaps, bias currents, and lengths of permanent magnets
are observed to be consistently different for individual actuators of the double-acting bearing. Performance
parameters of double-acting actuators and the controller of the magnetic bearing for different
choices have been presented.