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1. 南京理工大学 机械工程学院, 江苏 南京 210094
2. 中南大学 高性能复杂制造国家重点实验室, 湖南 长沙 410083
Received:03 April 2022,
Published Online:07 August 2023,
Published:30 July 2023
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Qiuyu SONG, Jian HU, Jianyong YAO, et al. Output Feedback Control for Launch Platform Using Neural Network Observer and Output Constraint[J]. Acta Armamentarii, 2023, 44(7): 2184-2196.
Qiuyu SONG, Jian HU, Jianyong YAO, et al. Output Feedback Control for Launch Platform Using Neural Network Observer and Output Constraint[J]. Acta Armamentarii, 2023, 44(7): 2184-2196. DOI: 10.12382/bgxb.2022.0229.
一种由两台永磁同步电机驱动的发射平台用于发射动能载荷
但该平台在实际运行中经常面临比较强的参数不确定性和气流冲击等未知的外部干扰
大大降低其跟踪精度。针对这一问题
提出一种用于发射平台高精度运动控制的考虑输出约束的基于自适应神经网络观测器输出反馈控制器。该控制器采用扩展状态观测器估计系统中的参数不确定性
同时利用其观测的系统速度值设计相关控制量
从而达到输出反馈控制的目的;另外设计一种改进的样条小脑模型关节控制器神经网络(Spline CMAC)对系统中的未知扰动进行估计
由此利用前馈补偿技术对参数不确定性和时变扰动进行补偿。考虑到发射平台在实际情况中遇到的输出约束问题
采用障碍Lyapunov函数分析法设计控制率并证明了系统的稳定性。仿真和实验结果表明:在考虑输出约束的条件下
新的复合控制器能够实现系统的一致最终有界稳定
且跟踪性能很好
并具有很强的抗干扰能力
相比于传统的控制方法有很大的提升。
A launch platform
driven by two permanent magnet synchronous motors
is used to launch kinetic energy loads. However
the platform often faces strong parameter uncertainties and unknown external disturbances
such as air impact
during practical operation. These factors can greatly reduce the platform’s tracking accuracy. To solve this problem
an output feedback controller based on adaptive neural network observer with output constraints is proposed for high-precision motion control of the launch platform. The controller uses ESO to estimate system parameter uncertainties in the system
and uses the velocity value of the system to design relevant control parameters to achieve the purpose of output feedback control. An improved Spline CMAC neural network is designed to estimate the unknown disturbances in the system. Feedforward compensation technique is used to compensate parameter uncertainty and time-varying disturbance. Considering the output constraints of the launch platform in practice
the control rate is designed by using the obstacle Lyapunov function analysis method. The stability of the system is also proved. The simulation and experimental results demonstrate that the proposed composite controller can achieve uniform final bounded stability of the system with good tracking performance and strong anti-interference capability while considering the output constraints. The proposed approach represents a great improvement over traditional control methods.
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ZHENG Y , MA D W , YAO J Y , et al . Linear active disturbance rejection control of two-axis coupled position servo system for rocket launcher [J ] . Acta Armamentarii , 2015 , 36 ( 6 ): 987 - 993 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2015.06.004 http://doi.org/10.3969/j.issn.1000-1093.2015.06.004 In order to study the performance of the position servo system of rocket launcher with the azimuth axis and pitch axis coupling, a model of two-axis coupling position servo system is established based on real servo system with velocity closed loop. The second-order approximate models of azimuth axis and pitch axis are proposed through frequency domain analysis. The linear extended state observer and active disturbance rejection controller of the two-axis system are designed to estimate and compensate uncertain dynamics. The simulation results show that the proposed observer estimates the total system disturbances satisfactorily, and the controller compensates the strong disturbance of combustion gas flow impact moment and the coupling effect. The proposed controller could restrain the vibration of the coupling system to maintain launching accuracy in condition of servo tracking and launching, of which control performance is superior to that of PID controller.
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陈强 , 丁科新 , 南余荣 . 带有输出约束的柔性关节机械臂预设性能自适应控制 [J ] . 控制与决策 , 2021 , 36 ( 2 ): 387 - 394 .
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