Journal of Hebei University of Science and Technology (Apr 2016)
Research advances in control methods of wearable walking assist robots
Abstract
As the proportion of the elderly in China increases, the need for robotic assist walking is growing. The assisted-as-needed (AAN) property of a wearable walking assist robot matches a user’s biological need and improves the flexibility, appetency and friendliness of a mechanical system. To realize AAN walking and aiming at realizing master/slave flexible assist, a new hybrid control method consisting of hip joint control based on central pattern generators and knee joint impedance structured control is proposed. The adaptation of a robot's master/slave motion mode to a user's physical function, the continuous switching method for knee joint impedance structured control and its stability, and the AAN effect of the Hybrid control theory are studied, which provides a new thought for the development of wearable walking assist robots.
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