幅值锁定型超流体陀螺模糊自抗扰控制系统设计

Design of Fuzzy Active Disturbance Rejection Control System for Amplitude Locked Superfluid Gyroscope

针对幅值锁定型超流体陀螺中热相位注入存在的温升延迟和热噪声影响陀螺系统测量精度和稳定性的问题,提出一种基于模糊自抗扰的超流体陀螺控制系统设计方法。首先建立超流体陀螺的数学模型;分析热相位注入引入的温升延迟和未知热噪声对系统敏感精度和稳定性的影响机理。在此基础上,设计集微分跟踪器、扩张状态观测和非线性反馈控制律于一体的自抗扰控制器,并进一步采用模糊推理实现非线性组合的比例和微分系数的自适应调整。最后利用Maltlab/Simulink进行仿真校验。仿真结果表明:该控制方法能够抑制未知噪声和温升延迟对系统的影响,对工作点实现良好的锁定,有效地提高了陀螺系统的测量精度和稳定性。

Aiming at the deterioration issue of amplitude-locked superfluid gyro system measurement accuracy and stability caused by temperature rise delay and thermal noise in the process of hot phase injection, a method for amplitude- locked superfluid gyroscope control system design based on fuzzy active disturbance rejection is proposed in this paper. Firstly, the mathematical model of superfluid gyroscope is established. The mechanism of effect of temperature rise delay and unknown thermal noise on system measurement accuracy and stability is analyzed. Secondly, a fuzzy active disturbance rejection controller, including differential tracker, extended state observation and nonlinear feedback control law is presented. Furthermore fuzzy reasoning is employed to realize the adaptive adjustment of proportional and differential coefficients in the nonlinear combination. Finally, the control method is verified by use of Mahlab/Simulink. Simulation results show that the design can effectively suppress the influence of unknown thermal noise and temperature rise delay on system measurement accuracy and stability, and achieve a good lock to the operating point, thus improving the system measurement accuracy and stability greatly.