Research on performance assessment of active surface system and actuators of large aperture radio telescope

The active surface system is a crucial component for large-aperture radio telescopes to achieve high-frequency and high-performance observations. However, there is no clear method for assessing the performance of the active surface system, resulting in a lack of clear and effective reference and evaluation indicators during construction, debugging, and operation. To address this issue, this paper analyzes the performance evaluation indicators of the active surface system and its main component, the actuator. Using actuator test data, the control performance evaluation index is studied, and the deficiencies of the minimum variance control performance evaluation method are analyzed. A control performance evaluation index based on historical benchmark data is proposed, establishing an evaluation benchmark using the autocorrelation and cross-correlation information of the benchmark data and operational data, which can analyze the causes of performance degradation. Furthermore, based on the weighted performance indices of individual actuators, the study considers the telescope’s final electrical performance indicators and proposes a design method for a control performance evaluation index of the active surface system that integrates a weighting function by combining the telescope’s aperture field illumination function, laying the foundation for establishing the control performance evaluation index of the active surface system.