采用镀银尼龙纤维自加捻，并与常规尼龙纤维共加捻，分别制备了2 种电热驱动的尼龙螺旋纤维人工肌肉。通过编程输入电的频率、大小和循环次数系统地研究了2 种聚合物纤维人工肌肉的驱动行为。结果表明，通过共加捻能调控复合尼龙螺旋纤维人工肌肉的电阻特性，在相同的输入电功率下，复合尼龙螺旋纤维人工肌肉产生更高的温度从而表现出更好的驱动性能。镀银尼龙螺旋纤维人工肌肉表现出6.34%的最大驱动形变、382 J/kg 的最大能量密度和468 W/kg 的最大功率密度。复合尼龙螺旋纤维人工肌肉表现出7.42%的最大驱动形变、428 J/kg 的最大能量密度和531 W/kg的最大功率密度。2 种聚合物纤维人工肌肉的驱动循环均能超过1万次，且驱动形变无明显衰减。
Two kinds of joule heat driven nylon coiled fiber based artificial muscles were prepared by twisting of silver- coated nylon fibers and co- twisting of silver- coated nylon fibers with conventional nylon fibers. The actuation behavior of the two coiled polymer fiber based artificial muscles was systematically studied by programming the frequency, magnitude and number of cycles of the input electric power. The results show that the electrical resistance of the coiled composite nylon fiber based artificial muscles is regulated by co-twisting. At the same input electric power, the coiled composite nylon fiber based artificial muscles generate a higher temperature and exhibit better actuation performance. The results show that coiled silver-coated nylon fiber based artificial muscles exhibit a maximum actuation stroke of 6.34%, a maximum work density of 382 J/kg, and a maximum power density of 468 W/kg. The coiled composite nylon fiber based artificial muscles exhibit a maximum actuation stroke of 7.42%, a maximum work density of 428 J/kg, and a maximum power density of 531 W/kg. The actuation of the two coiled polymer fiber based artificial muscles can exceed 1×104 cycles, and its actuation strokes have no obvious decrease.