| Citation: | XIA Youcai, KONG Weihong, SUN Qihui, et al. Experimental study on two-stage propulsion monorail rocket sled[J]. Journal of Aerospace Power, 2025, 40（3）：20230370 doi: 10.13224/j.cnki.jasp.20230370
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In order to improve the speed of rocket sled test under existing conditions, a two-stage propulsion monorail rocket sled structure was designed, and the test trajectory was designed and calculated according to the sled structure and the use of engines. Decelerating parachute and foam water tank were used to decelerate and recover the first and second stage sleds respectively, and the deceleration effect was verified by tests; the engine ignition technology and the separation technology between the stages of the multi-stage monorail sled during high-speed movement were studied, and the effect of the time controller controlling the ignition of the secondary engine and the throwing of the parachute was verified; the sled moving speed during the test was obtained by using high-speed camera and net target. It was concluded that, with the smooth completion of the test task, the structure of the two-stage sled was proved reasonable and reliable; the time controller triggered the secondary engine and deceleration device according to the set time, indicating that it can be safely and reliably applied to the rocket sled test; the deceleration parachute was thrown out in advance under high overload, so the design of the deceleration device needs to be improved; the secondary sled was successfully braked and recovered on the track, and the foam water tank had an efficient and reliable deceleration effect on the monorail sled.
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