Optimization method for extracting coupling matrix of generalized chebyshev filter;

Firstly,a coupling matrix is obtained through the electric performance requirements of the bandpass filter.

This paper studies a new fast conversion method about the coupling matrix analysis for cross-coupled resonator filters.

According to the working principle of magnetic bearing, there exists force coupling, magnetic coupling in radial magnetic bearings inside the magnetic suspension rotor system, and there exists force coupling, moment coupling between magnetic bearings as well.

The paper raises the problem of torsion coupling of a magnetic levitated system, deduces the formula for magnetic levitating force and coupling torque of a magnetic levitated system, and discusses the influences caused by magnetic levitating force and coupling torque of a magnetic levitated hard disk drive (HDD).