WT5”BZ]Starting from the direct current motors equation of momental equilibrium,the formulae of three kinds for using“free stopping”to test the time constant T M are derived.

This article introduces the realization of moment balance function of the ANSALDO total digital DC adjustable speed device in MPM mill,the parameters setting and the debugging steps in detail.

Analysis and flight tests show that such configuration can get pitching moment balance and longitudinal static stability.

The interative formulae is deduced based on building link a moment balance equation.

The paper expounds the structural characteristics of pneumatic vane motor and how to build the mathematic model based on mass flow rate continuity,law of thermodynamics and torque equilibrium principle.

Three-dimensional residual thrust method considering moment equilibrium;

But a new question arises when to format the equations of overall moment equilibrium of the forces acting on each slice, namely, different positions of moment centers can lead to different safety factors.

Whether the assumption of inter-slice forces of transmitting coefficient method is in reason for planar slip surface or whether moment equilibrium is a determinant of precision of stability calculation and whether the normal forces of e.

And counterpoise torque is analyzed with good results.