Control of an innovative super-capacitor-powered shape-memory-alloy actuated accumulator for blowout preventer
Abstract
The design of a super-capacitor-powered shape-memory-alloy (SMA) actuated accumulator for blowout preventer (BOP) presented in this paper featured several advantages over conventional hydraulic accumulators including instant large current drive, quick system response and elimination of need for the pressure conduits. However, the mechanical design introduced two challenges, the nonlinear nature of SMA actuators and the varying voltage provided by a super capacitor, for control system design. A cerebellar model articulation controller (CMAC) feedforward plus PID controller was developed with the aim of compensation for these adverse effects. Experiments were conducted on a scaled down model and experimental results show that precision control can be achieved with the proposed configurations and algorithms.
- Publication:
-
Modern Physics Letters B
- Pub Date:
- January 2017
- DOI:
- 10.1142/S0217984916504261
- Bibcode:
- 2017MPLB...3150426C
- Keywords:
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- Shape memory alloy;
- blowout preventer;
- super capacitor;
- cerebellar model articulation controller