Two key problems were solved : 1 ) to cancel the disturb of microwave cable rigidity on small thrust measurement of mpt adopting soft wave - guide without jacket as elastic linker , 2 ) to successfully realized separation of self - weight and thrust of mpt adopting small thrust measurement device of balance type , electromagnetic feedback and automatically compensation . so , the measurement precision and stability were greatly raised in actually application of small thrust measurement device 采用无护套的金属软波导管作为微波传输系统的弹性连件、天平式电磁反馈自动补偿的小推力测量装置，成功地实现了mpt自重与其产生的推力分离、解决了微波传输电缆对mpt小推力测量干扰的关键问题，在实现mpt小推力测量的实际应用中提高了测量精度和稳定性。
