Space target temperature calculation based on quantized state integration

To increase the speed of space target temperature calculation and space target infrared simulation, a method was proposed which solved discrete form heat balance equation based on quantized state integration. Difference in the speed of node temperature change in node equations was used to dynamically adjust the computation load. Sparse relationship between equations and variables were used to simplify calculation based on the constructed relation lists according to inter-relations between node equations and node variables as well as input vector components. General form finite element model for space target temperature calculation was built, based on which relation lists of inter-relations were obtained after analyzing relationship among node equations, node temperatures and radiation inputs. Quantized state integration was subsequently performed. Computer simulation was carried out for the temperature calculation of a large solar panel using 4th order Runge-Kutta method and quantized state integration method respectively, which proved the speedup of the proposed algorithm while satisfying the accuracy constraint.