关键词: 气球吊篮, 反捻机构, VxWorks实时操作系统

Abstract: For the sake of normal operation of the anti-twisting mechanism in a high attitude ballooned nacelle with large inertial loading, application of VxWorks real-time operating system in the anti-twisting mechanism’s controller is verified from the engineering practice point of view. In this study, the customized VxWorks real-time operating system is applied to improve safety and reliability of the system; the binary signal is used to synchronize user tasks with external timer interruptions and the control program of the system is designed with the PI incremental algorithm. In the experiment, the operation condition of the anti-twisting mechanism is simulated under balloon disturbance and load disturbance. The actual decoupling result is stated as follows：the average angular deformation of the distortion slice is 0.002 0°and the mean square error is 0.0015°; the average deviation at the azimuth angle is －0.2773°and the mean square error is 0.0953°. The experiment shows that the controller proposed in this study based on the VxWorks operating system has a high sampling rate, strong computing capability and stability, high flexibility, and it can be applicable to requirements of the anti-twisting system.

Key words: balloon’s nacelle, anti-twisting mechanism, VxWorks real time operating system