Typical risks and protective measures of wearable walking assistant robots

It is necessary to clarify the typical risks of wearable walking assistant robots (W2ARs) so that they will be widely accepted. In contrast to the wheeled robots, there have been no products similar to the W2ARs; therefore their manufacturers should begin with the risk assessments. This paper provides the risk assessments, and identifies the typical hazards in the system and application of the W2ARs. We also discuss what protective measures could reduce the risks and how to verify them. We hope this paper helps to develop safer W2ARs and establish international safety standards of W2ARs.