- Full text PDF available (2)
- This year (0)
- Last 5 years (3)
- Last 10 years (5)
Journals and Conferences
Stick-slip friction-induced oscillations appearing in oilwell drillstrings are a source of failures which reduce penetration rates and increase drilling operation costs. For this reason, a major problem to solve is modelling the drillstring torsional behaviour and proposing control solutions to help reduce stick-slip phenomenon. This paper is focused on… (More)
We consider one-dimensional, time-invariant sampled-data linear systems with constant feedback gain, an arbitrary fixed time delay, which is amultiple of the sampling period and a zero-order hold for reconstructing the sampled signal of the system in the feedback control. We obtain sufficient conditions on the coefficients of the characteristic polynomial… (More)
The aim of this paper is to show that modeling error compensation techniques  can be extended for the case of single-input/singleoutput minimum-phase, linear time-varying systems whose parameters can drift arbitrarily fast.