scholarly journals Development of a Control System and Interface Design Based on an Electric Wheelchair

2021 ◽  
Vol 25 (5) ◽  
pp. 655-663
Author(s):  
Jinseok Woo ◽  
◽  
Kyosuke Yamaguchi ◽  
Yasuhiro Ohyama
Keyword(s):  
Control System ◽  
Interface Design ◽  
Original Position ◽  
Ride Quality ◽  
Smart Device ◽  
Accelerator Pedal ◽  
Personal Mobility ◽  
Electric Wheelchair ◽  
Spring Mechanism ◽  
Distance Travel

Recently, personal mobility has been researched and developed to make short-distance travel within the community more comfortable and convenient. However, from the viewpoint of personal mobility, there are problems such as difficulty in picking up items while shopping when operating the joystick for shopping and the inability to use hands freely. Accordingly, because the speed of personal mobility can be controlled by foot stepping like an accelerator pedal, we developed an electric wheelchair system that can control the speed by pedal operation. Furthermore, we developed a control system that considers the ride quality using an electric wheelchair with pedal control. In this study, the proposed method is detailed in three parts. Firstly, to develop the pedal mechanism, a potentiometer was used to detect the angle of the pedal mechanism, and a spring mechanism was designed for return to its original position after the pedal was pushed. Next, we propose a feedback control system that considers the ride quality of the operator. In addition, we integrated the system with a smart device-based robot system to realize the mobility as a service (MaaS). Finally, we present several examples of the system and discuss the applicability of the proposed system.

scholarly journals Decentralized Optimization for a Novel Control Structure of HVAC System

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Shiqiang Wang ◽  
Jianchun Xing ◽  
Ziyan Jiang ◽  
Juelong Li
Keyword(s):  
Control System ◽  
Decentralized Control ◽  
Control Structure ◽  
Optimization Method ◽  
Labor Cost ◽  
Smart Device ◽  
Hvac System ◽  
Decentralized Optimization ◽  
System A ◽  
Novel Method

A decentralized control structure is introduced into the heating, ventilation, and air conditioning (HVAC) system to solve the high maintenance and labor cost problem in actual engineering. Based on this new control system, a decentralized optimization method is presented for sensor fault repair and optimal group control of HVAC equipment. Convergence property of the novel method is theoretically analyzed considering both convex and nonconvex systems with constraints. In this decentralized control system, traditional device is fitted with a control chip such that it becomes a smart device. The smart device can communicate and operate collaboratively with the other devices to accomplish some designated tasks. The effectiveness of the presented method is verified by simulations and hardware tests.

Fuzzy-EKF Controller for Intelligent Wheelchair Navigation

2016 ◽  
Vol 25 (2) ◽  
pp. 107-121 ◽  
Author(s):  
Malek Njah ◽  
Mohamed Jallouli
Keyword(s):  
Kalman Filter ◽  
Control System ◽  
Energy Management ◽  
Research Laboratory ◽  
Control Method ◽  
Severe Disabilities ◽  
Indoor Navigation ◽  
Electric Wheelchair ◽  
Security Environment ◽  
Intelligent Wheelchair

AbstractThe electric wheelchair gives more autonomy and facilitates movement for handicapped persons in the home or in a hospital. Among the problems faced by these persons are collision with obstacles, the doorway, the navigation in a hallway, and reaching the desired place. These problems are due to the difficult manipulation of an electric wheelchair, especially for persons with severe disabilities. Hence, we tried to add more functionality to the standard wheelchair in order to increase movement range, security, environment access, and comfort. In this context, we have developed an automatic control method for indoor navigation. The proposed control system is mounted on the electric wheelchair for the handicapped, developed in the research laboratory CEMLab (Control and Energy Management Laboratory-Tunisia). The proposed method is based on two fuzzy controllers that ensure target achievement and obstacle avoidance. Furthermore, an extended Kalman filter was used to provide precise measurements and more effective data fusion localization. In this paper, we present the simulation and experimental results of the wheelchair navigation system.

scholarly journals A Control System of Electric Wheelchair

2020 ◽  
Vol 740 ◽  
pp. 012009
Author(s):  
Weidong Yang ◽  
Yijiang Tang ◽  
Qiang Wang ◽  
Zhi Lan ◽  
Honglun Su
Keyword(s):  
Control System ◽  
Electric Wheelchair

Comparing Geometry Correction Capability of AGGS and TGCS Tamper Control Systems on Amtrak’s Northeast Corridor

2012 ◽  
Author(s):  
Jonathan M. Wnek ◽  
Steven M. Chrismer
Keyword(s):  
Control System ◽  
Control Systems ◽  
High Speed ◽  
Ride Quality ◽  
Control Software ◽  
Passenger Cars ◽  
Continuous Action ◽  
Track Geometry ◽  
Before And After ◽  
Geometry Correction

One of Amtrak’s high-speed continuous action tampers has been fitted with TGCS (Track Geometry Control System) tamper control software to compare the quality and durability of geometry correction it provides with that of the existing tamper control system, AGGS. Comparison between the two systems is made by reviewing measured track geometry data from before and after maintenance, and by reviewing changes in ride quality accelerations of instrumented passenger cars. Although the testing program is in its early stages and the number of test locations so far is limited, results to date are very much in favor of TGCS.

Design of Mutual Interaction Between a User and Smart Electric Wheelchair

2012 ◽  
Vol 16 (2) ◽  
pp. 305-312 ◽  
Author(s):  
Mihoko Niitsuma ◽  
◽  
Terumichi Ochi ◽  
Masahiro Yamaguchi ◽  
Koki Iwamot
Keyword(s):  
Pressure Sensors ◽  
Mobile Robot Navigation ◽  
Autonomous Mobile Robot ◽  
Personal Mobility ◽  
Electric Wheelchair ◽  
Input Method ◽  
Robot Behavior ◽  
Informative Communication ◽  
Environmental Map ◽  
Output Interface

This paper presents interaction between a user and a smart electric wheelchair. We propose a personal mobility tool (PMT) that integrates autonomous mobile robot navigation technology with intuitive and cognitive interaction between a user and a smart wheelchair. An intuitive and noncontinuous input method is proposed to enable a user to specify the direction in which the wheelchair is to go. Using an acceleration sensor and pressure sensors, the user gives a direction to the PMT, then the PMT determines the goal on an environmental map based on the direction. An output interface is used to help the user interpret robot behavior through informative communication between the user and the PMT. In this paper, a vibrotactile seat interface is presented.

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