Saiful Zaimy Yahaya

Saiful Zaimy Yahaya
Universiti Teknologi MARA | UiTM · Faculty of Electrical Engineering

About

31
Publications
1,043
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116
Citations
Citations since 2016
13 Research Items
82 Citations
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201620172018201920202021202205101520

Publications

Publications (31)
Chapter
Full-text available
Real-world functional electrical stimulation (FES) encounters nonlinear effects of fatigue and time delay that cause the FES controller to under-perform or sometimes fail. Nonlinearities cause the system to change, but it is not possible to re-tune the controller once its parameters are set. System representation using an observer can allow the pat...
Article
Full-text available
Functional electrical stimulation (FES) device has been widely used by spinal cord injury (SCI) patients in their rehab exercises to restore motor function to their paralysed muscles. The major challenge of muscle contraction induced by FES is early muscle fatigue due to the open-loop stimulation strategy. To reduce the early muscle fatigue phenome...
Article
Full-text available
This paper presents the analytical study of flexible stimulation waveforms in muscle fatigue reduction for functional electrical stimulator (FES)-assisted hemiplegic muscle activities. The major challenge of muscle contraction induced by FES is early muscle fatigue which greatly limits activities such as FES-assisted standing and walking. The fixed...
Conference Paper
The development of FES-assisted exercise system is a challenging task due to the dynamic behavior of the muscular skeletal system. This paper presents the design of the cycle to cycle control technique based on the fuzzy logic control (FLC) algorithm for FES-assisted elliptical stepping exercise. The control aims to produce an appropriate FES stimu...
Conference Paper
This paper proposed a new teaching technique for engineering courses based on the implementation of drone technology. In some engineering related courses, teaching and learning are difficult due to very complex theoretical and technical explanation need to be digested by the non experienced students. In Malaysia, quadcopter is one of the technologi...
Article
This paper presents the parameter optimization of the fuzzy logic controller (FLC) for the Functional Electrical Stimulation (FES)-assisted elliptical stepping exercise. The FLC is used to control the cadence of the elliptical stepping exercise for smooth exercise movement. Genetic algorithm (GA) and particle swarm optimization (PSO) are used to op...
Article
This paper describes the implementation of PID control strategy for a functional electrical stimulation (FES) in specific rehabilitation exercise known as elliptical stepping exercise. The PID controller is used to regulate the FES in controlling the knee joint torque of the paretic and non-paretic legs of the hemiplegic stroke patient during the e...
Article
This paper presents the implementation of a fuzzy logic controller (FLC) for an FES-assisted elliptical stepping exercise in stroke rehabilitation. The purpose of the system is to restore the function of the lower extremities for the stroke subject through the application of a Functional Electrical Stimulation (FES) in specified exercise technique....
Article
This paper describes the parameter optimization of PID controllers of knee-FES-ergometer used to control the paralyzed knee for smooth swinging exercise. The knee-FES-ergometer is a machine that helps elongate knee swinging exercise of paralyzed people by reducing the required electrical stimulus. Particle swarm optimization (PSO) is used to optimi...
Article
This paper presents the development of a model of knee swinging ergometer for stroke patient. Knee swinging ergometer is introduced as a hybrid exercise for restoration of function of the knee for stroke patients through the application of functional electrical stimulation. The aim of the new FES-assisted knee swinging ergometer is to provide high...
Conference Paper
Stroke disease is one of the major killer diseases worldwide and most of the survivors will end with certain level of impairment. They commonly are wheelchair bounded and require scheduled rehabilitation exercise to regain their walking capability or mobility. This paper presents the design of elliptical stepping exercise ergometer for functional e...
Conference Paper
Knee-FES-ergometer for knee swinging exercise is introduced as a hybrid exercise for restoration of function of the knee for stroke patients through the application of functional electrical stimulation (FES). The aim of the new knee-FES-ergometer is to provide high intensity knee swinging exercise. It is able to reduce required electrical stimulati...
Conference Paper
This paper presents the development of FES-assisted abdominal exercise that specially designed for persons with neurological disorder such as stroke. A model of modified abs flex exercise equipment namely abdominal exercise ergometer and the humanoid models were developed using the dynamic simulation software. The body composition of the humanoid m...
Article
This paper presents the development of a fuzzy logic controller for a knee-FES-ergometer for stroke patients knee swinging exercise. The knee-FES-ergometer is introduced as a hybrid exercise for a long repetitive knee swinging exercise for stroke patient through the application of a knee swinging ergometer and functional electrical stimulation. The...
Conference Paper
This paper presents the development of physiologically based mathematical model of quadriceps muscle and the implementation on Functional Electrical Stimulation (FES) assisted wheel-chaired elliptical stepping exercise. Two muscles that make up quadriceps muscle namely rectus femoris and vasti were developed. The muscle models were integrated with...
Conference Paper
This work is focused on the development of physiological and mathematical model of muscle extension induced by FES-assisted knee swinging ergometer. A muscle model composed of muscle activation, muscle contraction and body segmental dynamics is developed to perform full knee extension. The developed muscle model is then incorporated with a humanoid...
Conference Paper
This paper presents the model development of Functional Electrical Stimulation (FES)-assisted wheel-chaired elliptical stepping exercise. This exercise specially designed for persons with hemiplegic or spinal cord injury (SCI). The design involves the development of humanoid, wheelchair and elliptical stepping machine models. A feedback control sys...
Conference Paper
Functional electrical stimulation (FES) - induced limb movement is believed to provide therapeutic benefits for stroke patients. However, direct stimulation for a continuous repetitive movement can cause early muscle fatigue and ruin the patients desire to continue exercising. In this study, a model of a FES-assisted knee ergometer was developed to...
Article
The lower extremities of a humanoid model having the parameters of stroke patient is designed to promote an understanding of its paralysis behaviour. The assemblies of the model are designed using SolidWork, a three dimensional computer-aided design (CAD) software and converted into SimMechanics models for further simulations. The humanoid-lower ex...
Conference Paper
This paper describes the development of a self adaptive neuro-fuzzy control mechanism for FES-assisted indoor rowing exercise (FES-rowing). The FES-rowing is introduced as a total body exercise for rehabilitation of function of lower body through the application of functional electrical stimulation (FES). The neuro-fuzzy control technique is a cont...
Article
In this paper, the implementation of Hybrid Multilayered Perceptron (HMLP) network with two different activation functions has been studied. The study was conducted for PC based system and hardware based system and was evaluated in classifying the cervical cells data into it classes. For the hardware based system, this system was implemented in the...
Article
The variable size detector (V-detector) is a real-valued negative selection algorithm with variable-sized detector. The V-detector algorithm is a kind of negative selection algorithm (NSA) inspired by biological immune system (BIS).This paper overviewed the theory of basis V-detector algorithm and typical improved V-detector algorithm summarized th...

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