scholarly journals Ultrasonic Tethering to Enable Side-by-Side Following for Powered Wheelchairs

Sensors ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 109
Author(s):  
Theja Pingali ◽  
Edward Lemaire ◽  
Natalie Baddour
Keyword(s):  
Control System ◽  
Mental Stress ◽  
Control Algorithm ◽  
Ultrasonic Transducers ◽  
Social Activities ◽  
Social Situations ◽  
Plug And Play ◽  
Powered Wheelchair ◽  
Drive Control ◽  
Wheelchair Control

In social situations, people who use a powered wheelchair must divide their attention between navigating the chair and conversing with people. These conversations could lead to increased mental stress when navigating and distraction from maneuvering the chair. As a solution that maintains a good conversation distance between the wheelchair and the accompanying person (Social Following), a wheelchair control system was developed to provide automated side-by-side following by wirelessly connecting the wheelchair to the person. Two ultrasonic range sensors and three piezoelectric ultrasonic transducers were used to identify the accompanying person and determine their position and heading. Identification involved an ultrasonic beacon worn on the person’s side, at hip level, and receivers on the wheelchair. A drive control algorithm maintained a constant conversation distance along the person’s trajectory. A plug-and-play prototype was developed and connected to a Permobil F5 Corpus wheelchair with a modified Eightfold Technologies SmartChair Remote. Results demonstrated that the system can navigate a wheelchair based on the accompanying person’s trajectory, which is advantageous for users who require hands-free wheelchair control during social activities.

scholarly journals Realization of the Sensorless Permanent Magnet Synchronous Motor Drive Control System with an Intelligent Controller

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 365 ◽  
Author(s):  
Hung-Khong Hoai ◽  
Seng-Chi Chen ◽  
Hoang Than
Keyword(s):  
Control System ◽  
Permanent Magnet ◽  
Control Algorithm ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Intelligent Controller ◽  
Speed Regulation ◽  
Drive Control ◽  
Tracking Response

This paper presents the sensorless control algorithm for a permanent magnet synchronous motor (PMSM) drive system with the estimator and the intelligent controller. The estimator is constructed on the novel sliding mode observer (SMO) in combination with a phase-locked loop (PLL) to estimate the position and speed of the rotor. The intelligent controller is a radial basis function neural network (RBFNN)-based self-tuning PID (Proportional-Integral-Derivative) controller, applied to the velocity control loop of the PMSM drive control system to adapt strongly to dynamic characteristics during the operation with an external load. The I-f startup strategy is adopted to accelerate the motor from standstill, then switches to the sensorless mode smoothly. The control algorithm program is based on MATLAB and can be executed in simulations and experiments. The control system performance is verified on an experimental platform with various speeds and the dynamic load, in which the specified I-f startup mode and sensorless mode, inspected by tracking response and speed regulation. The simulation and experimental results demonstrate that the proposed method has worked successfully. The motor control system has smooth switching, good tracking response, and robustness against disturbance.

ALTERNATIVE WHEELCHAIR CONTROL INVOLVING INTENTIONAL MUSCLE CONTRACTIONS

2009 ◽  
Vol 18 (03) ◽  
pp. 439-465 ◽  
Author(s):  
TORSTEN FELZER ◽  
BRUNO STRAH ◽  
RAINER NORDMANN ◽  
SEBASTIAN MIGLIETTA
Keyword(s):  
Control System ◽  
User Interface ◽  
Real Life ◽  
Sensory Information ◽  
Severe Disabilities ◽  
Usual Method ◽  
Powered Wheelchair ◽  
Intelligent Wheelchair ◽  
Control Principle ◽  
Wheelchair Control

This paper deals with various ways of controlling an electrically powered wheelchair beyond the usual method involving a manual joystick. The main focus is on the newest version of HaWCoS – the "HAnds-free Wheelchair COntrol System" – allowing persons with severe disabilities to reliably navigate a power wheelchair without the need to use the hands. All the user has to do is to produce a sequence of tiny contractions of an arbitrary muscle, e.g., by raising the eyebrow. The working prototype of the system, which has been realized as a stand-alone device, is introduced in detail, together with a closer look at the muscle-based control principle and a brief description of a PC-based simulator. The advantages and the drawbacks of the system are discussed on the basis of a rather simple real-life experiment. The paper also elaborates on possible approaches to improve HaWCoS (by reducing or eliminating its problems) in the future. In addition to a quick software solution and a controller implementation involving supplemental sensory information, planned "improvements" include the development of an "intelligent wheelchair" with HaWCoS being some sort of a prototype for the User Interface component.

scholarly journals Modernization of Control Systems of Electric Drives of Mine Lifting Machines

2018 ◽  
Vol 41 ◽  
pp. 03006
Author(s):  
Ziyodullo Eshmurodov ◽  
Folib Holboiv
Keyword(s):  
Control System ◽  
Control Systems ◽  
Electric Drive ◽  
Control Algorithm ◽  
Frequency Converter ◽  
Automated Control ◽  
Electric Drives ◽  
Squirrel Cage ◽  
Drive Control ◽  
Efficient Control

The article shows the peculiarity of the system of technological automation of the newest Simatic S7-1500 PLCs, for electric drives of hoisting transport machines, the analysis of control systems for electric drives of operating mine hoisting machines of mining complexes. One of the main ways to increase the energy efficiency of MLM is to replace old asynchronous electric motors with a phase rotor with squirrel cage induction motors designed for operation in a frequency-controlled electric drive. The introduction of a frequency converter and an electric drive control system, which together allow the recovery of electricity in the supply network in the mode of generator braking. Thus, the system for automated control of the mine hoisting machine based on the Simatic S7-1500 PLC, with the developed control algorithm, is an integrated energy-efficient control system, which it is advisable to use in the management of the SHM.

Universal Android-Based Kit for Wireless Control of Wheelchairs

2014 ◽  
Author(s):  
Paul Mitzlaff ◽  
Robert Niznik ◽  
Redwan Alqasemi ◽  
Rajiv Dubey
Keyword(s):  
Control System ◽  
User Interface ◽  
Similar Data ◽  
Wheelchair Users ◽  
Powered Wheelchair ◽  
Wireless Control ◽  
Control Interface ◽  
Intuitive User Interface ◽  
Wheelchair Control

The use of apps on hand-held devices has the potential to offer advancements in controlling many devices with an intuitive user interface, including power wheelchair control. Many powered wheelchair users require special adaptations to their control interface in order to drive the chair. This paper presents the development and testing of an Android based control system for a powered wheelchair. The control system utilizes the Android device’s sensors to control the wheelchair. The device can be attached to various parts of the user’s body which the user can move to control the wheelchair. The accelerometers in the device are used to drive the chair using Bluetooth technology connected to the wheelchair’s control system. Subject testing was performed with the user holding the Android device in their hand while they performed a variety of structured tasks. These series of tasks were duplicated while the Android device was attached to their hat and again when strapped to the upper left arm. The results from the collected data on specific metrics were compared against similar data when the wheelchair is controlled using a standard wheelchair joystick.

Magnetic Flux Observers in the Drive Control System Equipped with a Double-Fed Motor

2018 ◽  
pp. 44-51
Author(s):  
Maksim A. BOBROV ◽  
◽  
Gennadii M. TUTAYEV ◽  
Keyword(s):  
Control System ◽  
Magnetic Flux ◽  
Drive Control

The Overall Design of the Comber Drive Control System Drive control system design

2020 ◽  
Vol 13 ◽  
Author(s):  
Xiaobei Wang
Keyword(s):  
Control System ◽  
Textile Industry ◽  
Production Efficiency ◽  
Vital Role ◽  
Cotton Textile ◽  
Drive Control ◽  
Operation Process ◽  
Control Computer ◽  
Industrial Control Computer ◽  
Made In China

Objective: The cotton textile industry, as a competitive industry in China's international competition, is confronting new opportunities and challenges brought by the growing process of mechatronics. To further improve the traditional drive control of combing machines made in China and the automatic level of machines as a whole, some of our cotton textile enterprises have undertaken necessary technical transformations on the combing machines so as to raise the operational efficiency and production technology of domestic textile equipments. Methods: This paper focuses on the basic status and dynamic characteristics of the drive part of the domestic new comber, and analyzes the operation process of the comber and the prominent problems from the production practice. Results: The technically improved drive control system uses an industrial control computer (IPC) as the core of the system, which effectively improves the overall working efficiency of the comber, and improves the production accuracy and production efficiency. Conclusion: The combers that are textile machinery equipments with comprehensive application of machines, electricity, gases and instruments, play a vital role in enhancing product quality and production efficiency. Highly intelligent and integrated process control, real-time monitoring and accurate data acquisition and data analysis have become the mainstreams in the development of auto-control. Therefore, the commitment of high technology to transform the traditional production mode has also been an important research.

Research of H∞ Robust Control for the Giant Die Forging Hydraulic Press’s Synchronous Control System under the Uncertainty Coefficient

2012 ◽  
Vol 190-191 ◽  
pp. 819-824 ◽  
Author(s):  
Ying Jian Deng ◽  
Zhong Wei Liu
Keyword(s):  
Control System ◽  
Robust Control ◽  
Control Algorithm ◽  
Hydraulic Press ◽  
National Defense ◽  
Synchronous Control ◽  
Performance Quality ◽  
System Synchronization ◽  
Uncertainty Coefficient

The giant hydraulic die press is our country national defense and the infrastructure essential equipment, the synchronous control system is the essential device to the giant forging hydraulic press, its synchronization control performance quality is good or bad will directly determine the quality of the product. This article through the proof of the theorem, gives the specific steps to achieve H∞ robust control algorithm. The simulation results show that: this control strategy has good inhibition to the change of system parameters, robustness is very strong, can well eliminate the system synchronization error.

scholarly journals An Adaptive Neuro-Fuzzy Control of Pneumatic Mechanical Ventilator

Actuators ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 51
Author(s):  
Jozef Živčák ◽  
Michal Kelemen ◽  
Ivan Virgala ◽  
Peter Marcinko ◽  
Peter Tuleja ◽  
...  
Keyword(s):  
Control System ◽  
Control Algorithm ◽  
Fuzzy Inference ◽  
Fuzzy Controller ◽  
Mechanical Design ◽  
Mechanical Ventilator ◽  
Mechanical Ventilators ◽  
Inference System ◽  
Control Approach ◽  
Neuro Fuzzy

COVID-19 was first identified in December 2019 in Wuhan, China. It mainly affects the respiratory system and can lead to the death of the patient. The motivation for this study was the current pandemic situation and general deficiency of emergency mechanical ventilators. The paper presents the development of a mechanical ventilator and its control algorithm. The main feature of the developed mechanical ventilator is AmbuBag compressed by a pneumatic actuator. The control algorithm is based on an adaptive neuro-fuzzy inference system (ANFIS), which integrates both neural networks and fuzzy logic principles. Mechanical design and hardware design are presented in the paper. Subsequently, there is a description of the process of data collecting and training of the fuzzy controller. The paper also presents a simulation model for verification of the designed control approach. The experimental results provide the verification of the designed control system. The novelty of the paper is, on the one hand, an implementation of the ANFIS controller for AmbuBag pressure control, with a description of training process. On other hand, the paper presents a novel design of a mechanical ventilator, with a detailed description of the hardware and control system. The last contribution of the paper lies in the mathematical and experimental description of AmbuBag for ventilation purposes.

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