Wyniki wyszukiwania - BazTech

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An Original System for Controlling the Speed of Movement of Pneumatic Drives in Rehabilitation Devices

Żyłka Marta, Żyłka Wojciech, Szczerba Zygmunt, Biskup Marcin

Advances in Science and Technology. Research Journal

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2023

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Vol. 17, no 1

124--132

EN

The aim of the article is to present an original method of speed control and simultaneous stroke of the piston rods of two pneumatic cylinders using potentiometric position transducers, pneumatic solenoid valves, properly scaled throttle-check valves, solenoid valves and a microcontroller with power modules for solenoid valves. Initial experimental studies of the control system for simultaneous displacement of two piston rods of pneumatic actuators were carried out. The purpose of the research was to obtain the characteristics of the displacement of the extension of two pneumatic drives. The obtained results were analyzed. The results of the measurements confirmed the possibility of applying the presented control to rehabilitation devices for passive exercises of the lower extremities. The advantage of the proposed control system is its reaction speed, which is a response to changes in operating conditions of a given actuator, such as: external disturbances, own resistance of the controlled device, frictional resistance or movement caused by the patient exercising on the rehabilitation device moved by these actuators.

2

Overview of solutions used in rehabilitation devices using muscles and pneumatic actuators

Żyłka Marta, Żyłka Wojciech

Science, Technology and Innovation

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2020

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Vol. 10, no. 3

15--22

EN

The article presents selected rehabilitation devices with the use of classic actuators and pneumatic muscles. Manipulators supporting the movements of the lower and upper limbs of humans are presented. Moreover, the construction of actuators and pneumatic muscles is described.

PL

W artykule przedstawiono wybrane urządzenia rehabilitacyjne z zastosowaniem klasycznych siłowników oraz muskułów pneumatycznych. Zaprezentowano manipulatory wspomagające ruchy kończyn dolnych i górnych człowieka. Ponadto opisano budowę siłowników i muskułów pneumatycznych.

3

Fuzzy logic controller to control the active air suspension

Woś Piotr, Dindorf Ryszard, Takosoglu Jakub

Archiwum Motoryzacji

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2020

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Vol. 89, nr 3

75--86

EN

The paper presents the practical implementation of active seat suspension used in vehicles and machinery. The test object is a passive suspension system, in which the vibro-insulating properties have been improved by using an active system controlled by a pneumatic bellows cylinder. Bellows cylinders in pneumatic drives act as single-acting cylinders - push cylinders. The filled bellows cylinder under constant pressure acts as an air spring. The volume of the air cushion changes under the pressure inside. Proportional pressure valve was used to control the bellows cylinder and noncontact relative displacement laser triangulation sensor was used to measure displacement of the seat. A Proportional-Derivative-Fuzzy Logic Controller (PD-FLC) was used for the control. The use of Fuzzy Logic Controller (FLC) enables the transition from a quantitative description to a qualitative process. The system structure with a designated output control function has been presented. Test results on the seat suspension vibro-insulating properties of a working machine are presented.

4

Low cost soft robotic gloves for at-home rehabilitation and daily living activities

Souhail Amir, Vessakosol Passakorn

Journal of Automation Mobile Robotics and Intelligent Systems

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2019

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Vol. 13, No. 3

14--26

EN

Stroke is one of the major reasons which affect the human hand functionality and lead to disability. Different repetitive exercises are used to regain the hand functionality which involves robotic exoskeleton. Soft pneumatic actuators are one of the good alternatives to rigid and fixed exoskeletons for rehabilitation. This paper presents soft robotic gloves fabricated with two different lowcost silicones which can be used in daily living activities and rehabilitation purpose. Soft robotic gloves are light weight and compact. These robotic gloves utilize the pneumatic pressure to flex and extend the human hand. Soft robotic gloves were tested on a healthy object for grasping and rehabilitation ability. Results showed that robotic glove was able to grasping and do the Kapandji test. This work presents an important step toward low cost efficient soft robotic devices for rehabilitation of stroke patients.

5

Comparison analysis of silo discharging devices operated by pneumatic actuator

Telek P., Szaladnya S.

Zeszyty Naukowe Politechniki Poznańskiej. Budowa Maszyn i Zarządzanie Produkcją

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2008

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Nr 8

101-111

EN

In this paper we give a short overview about the advanced modelling of silo discharging processes. At first we draw the theoretical principles of the discharging process, we define the elements and their relations. Second part of the paper contains the mathematical description of the discharging process and gives a possible solution variety. At the end we show an example for the application of the researched method in which we compare two type of discharging devices operated by pneumatic actuator and analyse the effects of the changing of some parameter of the discharging system.