Wheelchair virtual joystick interface

VanSickle, D.P.; Cooper, Rosemarie; Ster, Jelle van der

doi:10.1109/iembs.1995.579628

Cited by 5 publications

(5 citation statements)

References 2 publications

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“…Өj It has been assumed that the signal given by the x-pot ranges from zero to one, while the signal given by the y-pot ranges from −1 to 1, i.e., the magnitude of joystick signals have been limited by software as in [4]. This means that the magnitude of vector R j cannot be greater than unity, as indicated by the dotted circular line in Figure 1.…”

Section: Y Rjmentioning

confidence: 99%

“…Inside the program, the signals coming from the potentiometers of the joystick are normalized and the velocity commands are calculated using Equations (3) and (4). Then, a PWM signal with a switching frequency of 50 ms and a duty cycle proportional to the calculated velocity magnitudes is provided to the DC motors.…”

Section: Experimentation Platformmentioning

confidence: 99%

“…In recent years, terrestrial vehicles and robots have gained research interest due to their potential use in military and rescue missions [1][2][3] as well as in medical applications to help the paraplegic people in their locomotion activities [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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An Infinite-Norm Algorithm for Joystick Kinematic Control of Two-Wheeled Vehicles

et al. 2018

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In this paper, we propose an algorithm based on the mathematical p-norm which has been applied to improve both the traction power and the trajectory smoothness of joystick-controlled two-wheeled vehicles. This algorithm can theoretically supply 100% of available power to each of the actuators if the infinity-norm is used, i.e., when the p-norm tends to infinity. Furthermore, a geometrical model using the radius of curvature has been developed to track the effect of the proposed algorithm on the vehicle’s trajectory. Findings in this research work contribute to the kinematic control and path planning algorithms for vehicles actuated by two wheels, such as tanks and electric wheelchairs, both of vital importance for the security and heath industry. Computer simulations and experiments with a real robot are performed to verify the results.

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Section: Y Rjmentioning

confidence: 99%

Section: Experimentation Platformmentioning

confidence: 99%

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An Infinite-Norm Algorithm for Joystick Kinematic Control of Two-Wheeled Vehicles

et al. 2018

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“…The output of the microcontmller was used to set the resistance on two digitally controlled potentiomcters (Xicor X9C104) to duetermine the &dquo;X&dquo; and &dquo;I''' directions of the joystick port on a persona) computer. A simple external switch was used to provide control over the &dquo;firing&dquo; function c,t games when necessary (14). The computer used for this study was a I)ell Pentium I1 ?66.…”

Section: Subjects (Phase 2)mentioning

confidence: 99%

“…The mean age of the suhjects were 42.2 ± 13.9 years of age, and mean years post SCI were 17.0 ± 11.6 years. There was a wide range of SCIS, including 9 cervical, 14 thoracic, 5 lumbar, and 7 other types of disabilities, including amputations and nerve disease.…”

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confidence: 99%

Evaluation of a Manual Wheelchair Interface to Computer Games

O'Connor

Cooper

Fitzgerald

et al. 2000

Neurorehabil Neural Repair

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The sedentary lifestyle of many people with spinal cord injury (SCI) has lead to cardiovascular diseases being a major health concern. A suitable exercise program may help improve the SCI individual's cardiovascular fitness level. GAMEWheels is an interface between a custom wheelchair roller system and a computer that enables an individual to control computer video games by driving his or her wheelchair. The purpose of Phase 1 was to evaluate the design of the GAMEWheels system and to determine the type of computer video game that is likely to motivate wheelchair users to exercise. Phase 2 included physiologic testing of wheelchair users and the GAMEWheels system to investigate whether the system elicits an exercise training response. Thirty-five subjects were recruited to evaluate the GAMEWheels by playing three commercial computer games (Phase 1) and to identify the computer game that they would prefer to use when exercising. The feedback from Phase 1 was used with test subjects to verify that the GAMEWheels system elicits an exercise training effect (Phase 2). Phase 2 included 10 subjects using the GAMEWheels system to play Need for Speed II. During game play, physiologic data were collected and the subjects' oxygen consumption and heart rate were analyzed. Analysis showed that the GAMEWheels system induced nine subjects to reach their training zone, defined as 50% and 60% of their maximum oxygen consumption and heart rate, respectively. This study demonstrates that the GAMEWheels system elicits an exercise training response.

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Smart mobility solution with multiple input Output interface

Sethi

Deb

Ranjan

et al. 2017

2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

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Smart wheelchairs are commonly used to provide solution for mobility impairment. However their usage is limited primarily due to high cost owing from sensors required for giving input, lack of adaptability for different categories of input and limited functionality. In this paper we propose a smart mobility solution using smartphone with inbuilt sensors (accelerometer, camera and speaker) as an input interface. An Emotiv EPOC+ is also used for motor imagery based input control synced with facial expressions in cases of extreme disability. Apart from traction, additional functions like home security and automation are provided using Internet of Things (IoT) and web interfaces. Although preliminary, our results suggest that this system can be used as an integrated and efficient solution for people suffering from mobility impairment. The results also indicate a decent accuracy is obtained for the overall system.

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Wheelchair virtual joystick interface

Cited by 5 publications

References 2 publications

An Infinite-Norm Algorithm for Joystick Kinematic Control of Two-Wheeled Vehicles

An Infinite-Norm Algorithm for Joystick Kinematic Control of Two-Wheeled Vehicles

Evaluation of a Manual Wheelchair Interface to Computer Games

Smart mobility solution with multiple input Output interface

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