Formation of position feedback in system of bioelectric and myotonic methods of artificial hand control

Authors:

Burov Gennady Nikolayevich, PhD in Technical sciences, head of scientific direction, Albrecht Federal Scientific Centre of Rehabilitation of the Disabled, 50 Bestuzhevskaya Street, 195067 St. Petersburg, Russian Federation, e-mail: zxzy@yandex.ru

Bolshakov Vladimir Alexandrovich, head of design department, Albrecht Federal Scientific Centre of Rehabilitation of the Disabled, 50 Bestuzhevskaya Street, 195067 St. Petersburg, Russian Federation, e-mail: pko09_903@mail.ru

Belyanin Oleg Leonidovich, head of the Department of biomechanical research of the musculoskeletal system, Albrecht Federal Scientific Centre of Rehabilitation of the Disabled, 50 Bestuzhevskaya Street, 195067 St. Petersburg, Russian Federation, e-mail: belynin.oleg41@bk.ru

Drobakha Alena Sergeevna, junior researcher, Albrecht Federal Scientific Centre of Rehabilitation of the Disabled, 50 Bestuzhevskaya Street, 195067 St. Petersburg, Russian Federation, e-mail: drobaha-alena@mail.ru

Annotation:

Introduction. Purposeful processes performed by a person to meet various needs are an organized and ordered set of actions, operations that are divided into two main types: work operations and management operations.
This is especially true for devices that perform atypical motor acts. The development of systems for controlling the movement of fingers of artificial hands for prosthetics of disabled people with amputational defects of the forearm and shoulder is an urgent task.

The aim of this work is to form positional feedback in the systems of bioelectric and myotonic control of the movement of fingers of an artificial hand in the prosthetics of disabled people with amputational defects of the forearm and shoulder.

Materials and methods. To achieve this aim, some methods of sensing the mobility of arm segments with amputational defects of the forearm and shoulder under myotonic or bioelectric control were studied and developed. dynamic tactile sensations were studied as a source of information about the positional position of the fingers of an artificial hand. A stationary positional sensing module has been designed for the above experiments.

Results. In the course of further research, a preliminary study of a new positional sensing device, the active cuff, was carried out, the use of which is provided as part of the control system for the prosthetic forearm, equipped with an artificial brush with a master sensor.

Discussion. When considering modern samples of brush prostheses, namely: bebionic or Michelangelo hand prostheses, as well as MyoFacil forearm and DinamicArm prostheses, noting their high functionality, it must be recognized that the lack of feedback when managing the fingers of an artificial brush makes it difficult to manipulate objects, since the operator, a disabled person, does not have information about the position of the fingers in the process of control, for example, when working behind an obstacle.

Conclusion. The positional sensing device allows the disabled operator to receive information in the natural mode about the position of the fingers of the hand, about the beginning and end of the movement, and the process of movement itself.

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