FlexCVA：一种用于主动矫形器的连续可变致动器。
FlexCVA: a continuously variable actuator for active orthotics.
作者信息
Horst Robert W, Marcus Richard R
机构信息
Tibion Corp., Moffett Field, CA 94035, USA.
出版信息
Conf Proc IEEE Eng Med Biol Soc. 2006;2006:2425-8. doi: 10.1109/IEMBS.2006.259950.
Active orthotic devices require actuators with high torque, a free movement mode, high efficiency, and small size and weight. The FlexCVA is a new type of actuator that addresses these requirements in a unique way. It provides continuously varying torque through the use of two belts alternately deflected by cams. The belts alternate in supplying output torque with one belt pulling the output while the slack is removed from the other belt. The drive ratio is automatically adjusted in response to the load by varying the deflection distance of the belts. The resulting actuator prototype has been demonstrated to supply up to 34 Nm of output torque, and its free movement mode allows it to be backdriven at speeds greater than 400 deg/sec.
主动式矫形器械需要具备高扭矩、自由运动模式、高效率以及小尺寸和轻重量的致动器。FlexCVA是一种新型致动器，它以独特的方式满足了这些要求。它通过使用由凸轮交替偏转的两条皮带提供连续变化的扭矩。两条皮带交替提供输出扭矩，一条皮带拉动输出端，同时从另一条皮带上消除松弛部分。通过改变皮带的偏转距离，传动比会根据负载自动调整。由此产生的致动器原型已被证明能够提供高达34牛米的输出扭矩，其自由运动模式使其能够以大于400度/秒的速度被反向驱动。
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