Study on Deflection of Impression Cylinder and Active Compensation Method;

Considering the preliminary curvature, the deflection of casing string in curved segment of the well is analyze.

We present a method for computing annular slice deflection.

Directed at the poor product use resulting from machine wear and tear caused by the vibration due to the dynamic unbalance of high-speed flexible rotor rotation,the paper introduces the use of dynamic balance by balanced mechanics principle to deal with free vibration of flexible rotor,deflection deform,educe the dynamic balance condition and realize method about flexible rotor.

In order to eliminate the effect of gyros drift and IMU installing error and ship flexure deformation on the accuracy of initial alignment,the extended Kalman filter and velocity-plus-angular rate matching method are applied to estimate and compensate these errors in this paper.

In this paper, a calculation method of affections caused by shear forces to the flexure deformation of a simple supported toothed beam was carried out from the formula of general displacements calculating.

The H∞filtering is introduced to deal with the velocity matching error,which is caused by the uncertainty of lever-arm size in the condition of long lever-arm size and severe flexure deformation.