As there is an inductance, the suspension current of different suspension
points of suspension electromagnets have different perturbation and time lag to a certain extent.
The swing arm length of nether arms is not analyzed as an effect variable in this paper because changing the swing arms of nether arms is equal to changing the suspension hard point which involves the coordination of hard
points of suspension and steering.
This format of the amplitudes [a.sub.an], [b.sub.an] representation harmonizes well with the design document for TL pylons which regulates coordinates of
points of suspension of its wires with respect to earth surface.
where: s = H - h is the conductor sag, L - distance between the
points of suspension, H - the height of the highest and h - the lowest points above the ground.