卫星能源约束检查模型改进及仿真

卫星能源约束检查模型对卫星任务规划有重要参考作用,可防止因能源不足而导致卫星故障或任务不能顺利完成。现有的能源约束检查模型存在部分问题:人为设定计算初始值,导致计算不准确;能源约束检查不通过时未给出符合能源约束的任务调整建议,导致任务不能快速调整;未对计算误差进行校正,导致误差积累。对此,提出了一种改进的能源约束检查模型,在原有模型中加入能源数据库对卫星运行的能源数据进行记录,从而准确获取初始值,并在模型中加入任务调整和遥测校正功能。该模型可实现能源约束计算自动管理及任务自动调整功能,缩短任务规划周期,提升紧急任务的执行效率。对改进的模型进行仿真,结果表明:模型预测结果与预期值相符,任务调整和能源校正功能实现良好,能实际应用到运控系统中进行规划任务能源约束检查和能源管理。

Improvement and Simulation of Satellite Energy Constraint Checking Model

Satellite energy constraint checking model has a significant reference value for task assignment, and it can prevent the tasks from being implemented unsuccessfully or satellite failure due to lack of energy. However, the existing energy constraint models have some problems in practical application. The initial value of models should be set manually, which will degrade the accuracy of energy constraint checking. And also, adjustment recommendations are never given to task assignment system when tasks cannot pass the energy constraint checking, thus tasks cannot be adjusted quickly. What is more, the calculation errors will accumulate if they are not eliminated. Therefore, an improved energy constraint checking model based on energy database is proposed. The energy data in this model is continuous in time so that energy value of initial time can be extracted from energy database. In addition, task scheduling adjustment model and power adjustment model are attached to this model. The improved model can realize automatic management and automatic adjustment of tasks, which shorten task planning period and improve the efficiency of emergency tasks. Computed results of this model are in line with expectations. It is shown that functions of task adjustment and energy adjustment behave well, which demonstrates the effectiveness of this model.