Control Design for Articulating Turbine Rotor Blades for High-Efficiency Turbine Operation
Abstract
Conventional gas turbine engines are designed to operate at nearly fixed operation conditions including speed and blade geometries. If the operating conditions change, the flow incidence angles may not be optimum with the blade geometries and thus result in reduced performance. Active control of the pitch angles of compressor and turbine blades can improve performance by maintaining flow incidence angles within the optimum range for given blade geometries for varying operating conditions. Articulating the angles of turbine or compressor blade using smart material-based actuators such as Shape Memory Alloy (SMA) has been investigated under this effort. In using SMA actuators, output position tracking control plays an important role in the control process, and the control objective is to make the output position robustly follow the desired reference. A nonlinear control theory was adopted to address the hysteresis and nonlinearity. According to the system dynamics characteristics, control laws have been designed to achieve the output position tracking control and maintain the stability of the closed-loop system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2019
- Accession Number
- AD1074444
Entities
People
- Anindya Ghoshal
- Muthuvel Murugan
- Sun Yi