Optimization of Spacecraft Thruster Management Function

摘要: Some new mathematical algorithms related to spacecraft thruster selection problems have been designed, implemented, and tested. The proposed approach is based on the concept of precomputing a set optimal combinations thrusters storing according data in onboard computer (OBC) memory. During nominal flight spacecraft, only look-up procedure will be required select, real-time mode, right combination not more than six (for six-dimensional task) their firing times. For off-nominal situations, when propulsion subsystem has often operate at edge its capability provide maximum linear and/or angular control accelerations, an additional algorithm modification parametric simplex method, Real-time software implementing requires from 0.05 ms 0.21 executed SUN workstation with 550-MHz UltraSparc processor. Regarding size OBC memory for computation data, 52 KB are needed 20 thrusters. user provided flexibility select option, which better meets specific criteria constraints such as execution time accuracy solution (at expense or memory). In addition C-code implementation, module (intended real time) could implemented standard SIMULINK library block can integrated different simulators test purposes. project demonstrated effectiveness robustness designed both open-and closed-loop tests including various maneuvers.