Semi-active Control of Wind Impact Effects by Means of Pneumatic System
نویسنده
چکیده
1 SUMMARY Possibilities of new applications of smart devices arise with the development of new generation wind turbines. Rotor up-scaling implies a need to control dynamic characteristics of loads transferred from blades to the hub and tower. The motivation for this work was to demonstrate an approach to control dynamic reaction force resulting from a wind blow. A controllable gas spring was chosen as a ‘smart bond’ between two sub-structures. The goal of the control was to keep the value of force in ‘smart bond’ below some critical level throughout the blow duration. Dynamic numerical analysis was performed with real-time feedback between a sensor and semi-active control device. A small-scale experimental set-up was developed with piezo-actuated valve to control the air flow between a pneumatic piston and an air reservoir. The aim for the tests will be to meet the control goal, while keeping the fixed amount of medium in the pneumatic system, i.e. to work in a repetitive and semi-active manner.
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