By a lot of experiment, the author claimed a soft arc striking technic which lead the arc ignition success rate to as high as above 90%.
作者还通过大量的试验，以软起动引弧方式，使焊机的引弧成功率达90%以上。
2
Based on minimal fuel principle, the switching curve of ignition is confirmed by using optimization theory, and a braking scheme is designed for the process of the lunar probe vertical soft landing.