Huang Qixuan, Zhou Jiaxing, Chen Xiang, Li Qing, Chen Runjing
School of Electrical Engineering and Automation, Xiamen University of Technology, Xiamen 361024, China.
Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control, Xiamen 361024, China.
Sensors (Basel). 2024 Aug 11;24(16):5198. doi: 10.3390/s24165198.
A two-axis semi-strapdown stabilized platform is a device designed to eliminate aircraft disturbances and ensure the stability of the sensor's orientation. A traditional two-axis semi-strapdown stabilization platform for aircraft can effectively control disturbance in pitch and yaw channel, but it cannot achieve ideal disturbance control in the roll channel. In order to solve this problem, an adaptive control method based on disturbance transformation and LWOA-PID is proposed. Disturbance transformation is the process of integrating the angular position disturbance of the roll from the previous moment into the combined disturbance of the pitch and yaw at the current moment. This is followed by decoupling the combined disturbance of the pitch and yaw at the current moment, thereby eliminating the disturbance caused by the roll from the previous moment. This process is repeated to achieve the goal of eliminating roll channel disturbances. To ensure the line of sight (LOS) pointing accuracy stability in the two-axis semi-strapdown stabilized platform system for aircraft, a whale optimization adaptive proportional-integral-derivative (LWOA-PID) controller based on Latin hypercube sampling is designed. It is then compared with the classical PID controller in Matlab/Simulink. The simulation results indicate that the disturbance conversion module proposed in this paper can eliminate the impact of roll axis disturbances on the LOS pointing accuracy of the two-axis semi-strapdown stabilized platform for aircraft. Compared to the classical PID controller, the LWOA-PID controller reduces tracking errors for step and sinusoidal signals by 50% and 75%, respectively. It also shortens optimization time by 37.5% compared to the WOA-PID while maintaining the same level of accuracy. Furthermore, when combined with the conversion module, the tracking error is reduced by an additional order of magnitude.
两轴半捷联稳定平台是一种旨在消除飞机干扰并确保传感器定向稳定性的装置。传统的飞机两轴半捷联稳定平台能够有效控制俯仰和偏航通道中的干扰，但在横滚通道中无法实现理想的干扰控制。为了解决这个问题，提出了一种基于干扰变换和LWOA-PID的自适应控制方法。干扰变换是将上一时刻横滚角位置干扰积分到当前时刻俯仰和偏航的组合干扰中的过程。接着对当前时刻俯仰和偏航的组合干扰进行解耦，从而消除上一时刻横滚引起的干扰。重复这个过程以实现消除横滚通道干扰的目标。为确保飞机两轴半捷联稳定平台系统中视线（LOS）指向精度的稳定性，设计了一种基于拉丁超立方采样的鲸鱼优化自适应比例积分微分（LWOA-PID）控制器。然后在Matlab/Simulink中与经典PID控制器进行比较。仿真结果表明，本文提出的干扰转换模块可以消除横滚轴干扰对飞机两轴半捷联稳定平台LOS指向精度
