摘要
针对感应电机控制系统中速度传感器故障提出了一种自愈控制方法。考虑转子电阻不确定性,基于多项式混沌理论(PCT),对定子电流模型进行扩展,再利用扩展Kalman滤波法,设计定子电流观测器,并在此基础上设计速度自适应估计器。当传感器正常时,利用电流观测器观测值进行状态监测;传感器发生故障后,系统利用估计转速代替传感器信号作为新的反馈,保证系统的连续运行,实现了对系统的自愈控制。仿真结果验证了该方法的有效性。
A self-healing control method is proposed for sensor fault in motor drive system.Considering uncertainty of rotor resistance,stator current model is expanded by polynomial chaos theory（PCT）,and stator current observer is designed based on extended Kalman filter.Then speed adaptive estimator is constructed.When sensor is in healthy condition,the system can diagnose state based on the observed value of current observer.If fault occurs in speed sensor,the value of the sensor can be replaced by estimated value of speed as a new feedback to ensure the system continuous operation.Thereby the goal of self-healing control of motor system is achieved.Finally,simulation results demonstrate the effectiveness of the method.
出处
《测控技术》
CSCD
2016年第12期83-87,共5页
Measurement & Control Technology
基金
国家自然科学基金(61573167)
江苏省自然科学基金(BK20141114)
中央高等基本科研业务费专项资金资助项目(JUSRP51510)
