- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2019 IEEE 58th Conference on Decision and Control (CDC) - Nice, France (2019.12.11-2019.12.13)] 2019 IEEE 58th Conference on Decision and Control (CDC) - Laser Sintering Control for Metal Additive Manufacturing by PDE Backstepping
摘要： The dynamic response of the pitch angle slows down when the pitch actuator of wind turbines fails, and the fault leads to ?uctuations in the generator speed and in the output power. According to identi?cation and analytical theories, a fault-tolerant control combined with fault estimation is proposed to solve this problem. The simpli?ed two-order transform function of the pitch actuator is transformed into the identi?cation equation by means of the Euler transformation method. Next, the time-varying natural frequency and the damping ratio of pitch actuators are regarded as gradual change and abrupt change parameters; these two parameters are estimated using the proposed sliding data window least squares-based iterative (SDW-LSI) identi?cation algorithm. The sliding data window length is adjusted when changes in the system parameters are detected. Then, according to analytical theory, a compensation equation is derived in the pitch actuator, and the estimated values are fed back to the compensation module to adjust the relations before and after fault occurrences in the pitch actuator to eliminate the effects caused by the pitch actuator failure. Finally, the feasibility of the SDW-LSI algorithm is validated by choosing the fault of high air content in the hydraulic oil.
关键词： Fault diagnosis,system identi?cation,wind power generation,fault tolerant,hydraulic actuators
更新于2025-09-23 15:19:57
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[IEEE 2019 24th Microoptics Conference (MOC) - Toyama, Japan (2019.11.17-2019.11.20)] 2019 24th Microoptics Conference (MOC) - Optimized LED-based Optical Wireless Power Transmission System Configuration for Compact IoT
摘要： The dynamic response of the pitch angle slows down when the pitch actuator of wind turbines fails, and the fault leads to ?uctuations in the generator speed and in the output power. According to identi?cation and analytical theories, a fault-tolerant control combined with fault estimation is proposed to solve this problem. The simpli?ed two-order transform function of the pitch actuator is transformed into the identi?cation equation by means of the Euler transformation method. Next, the time-varying natural frequency and the damping ratio of pitch actuators are regarded as gradual change and abrupt change parameters; these two parameters are estimated using the proposed sliding data window least squares-based iterative (SDW-LSI) identi?cation algorithm. The sliding data window length is adjusted when changes in the system parameters are detected. Then, according to analytical theory, a compensation equation is derived in the pitch actuator, and the estimated values are fed back to the compensation module to adjust the relations before and after fault occurrences in the pitch actuator to eliminate the effects caused by the pitch actuator failure. Finally, the feasibility of the SDW-LSI algorithm is validated by choosing the fault of high air content in the hydraulic oil.
关键词： Fault diagnosis,system identi?cation,wind power generation,fault tolerant,hydraulic actuators
更新于2025-09-23 15:19:57