Fei Gao

Fei Gao
Chinese Academy of Sciences | CAS · Shenzhen Institutes of Advanced Technology

PhD
Postdoctoral positions are available in my group. Please feel free to contact me. (email: gaofeicsu104@gmail.com)

About

45
Publications
16,203
Reads
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692
Citations
Citations since 2017
34 Research Items
676 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Introduction
Call for papers: 1)Special Issue “Exploiting Energy Harvesting Technologies to Capture Energy from Human Motion for Powering Wearable Electronics, Sensors, and IoT Devices” in collaboration with Frontiers in Robotics and AI (CiteScore 4.4). frontiersin.org/research-topics/35861/ 2)Special Issue "Biomechanics and Energetics of Human Motion When Walking with Lower Limb Orthoses, Prosthesis, and Exoskeletons" with symmetry. https://www.mdpi.com/journal/symmetry/special_issues/Biomec
Additional affiliations
September 2018 - July 2021
The Chinese University of Hong Kong
Position
  • PostDoc Position
Education
July 2014 - September 2018

Publications

Publications (45)
Conference Paper
Full-text available
To improve the energy efficiency and downsize the powered ankle-foot prostheses (PAFP) but still provide sufficient instantaneous power output, elastic actuators (EAs) are widely used. Generally, there are two kinds of EAs: series elastic actuator (SEA), and parallel elastic actuator (PEA). Both of them can reduce the energy requirement and peak po...
Article
Full-text available
The number of people with a mobility disorder caused by stroke, spinal cord injury, or other related diseases is increasing rapidly. To improve the quality of life of these people, devices that can assist them to regain the ability to walk are of great demand. Robotic devices that can release the burden of therapists and provide effective and repet...
Patent
Full-text available
A powered ankle-foot prosthesis and associated methods of use are described herein. Such prostheses can employ an actuator and elastic components, the actuator being controlled to deliver net positive work to propel the wearing amputee forward and the elastic components being used to store and release negative energy to improve efficiency. Elastic...
Article
Exoskeletons are considered as promising devices for motion assistance of mobility impaired patients and motor ability augmentation of healthy people. Considering the interactive action between exoskeletons and human body, a safe and comfortable human-exoskeleton interaction is essential to achieve effective exoskeleton operation for human motion a...
Article
Full-text available
The rapid advance of the Internet of Things (IoT) has attracted growing interest in academia and industry toward pervasive sensing and everlasting IoT. As the IoT nodes exponentially increase, replacing and recharging their batteries proves an incredible waste of labor and resources. Kinetic energy harvesting (KEH), converting the wasted ambient ki...
Conference Paper
In this paper, we proposed a smart prosthetic knee that is driven by a novel cam-leaf spring-MR damper mechanism (CLS-MRD) and a DC motor. The DC motor can work as a generator to harvest energy and as an actuator to actively regulate the knee angle or provide positive work. The CLS-MRD can work in three modes by controlling the MR damper. When...
Article
Full-text available
The concept of synergy has drawn attention and been applied to lower limb assistive devices such as exoskeletons and prostheses for improving human-machine interaction. A better understanding of the influence of gait kinematics on synergies and a better synergy-modeling method are important for device design and improvement. To this end, gait data...
Article
Taking advantage of the magnetically controllable rheological properties of magnetorheological (MR) fluid, MR dampers are widely used in many engineering fields. Much effort has been made to improve the performance of MR dampers. Structural optimization is one of the popular methods to effectively improve the performance parameters of MR dampers. M...
Article
The solutions to small deflections of uniform cantilever beams have been obtained and widely used. However, when the deflections become large, it is quite challenging to derive the solutions due to the geometric nonlinearity, especially for non-uniform beams. To handle that, in this paper, a novel and an efficient method called the being gradually...
Article
Magnetorheological (MR) fluid, whose rheological properties can be changed reversibly by applied magnetic field, offers superior capabilities and opportunities since its invention. The most crucial feature of MR fluid is its controllable and continuous yield stress. Taking this advantage, MR fluid is gaining popularity in various medical applicatio...
Article
Full-text available
Making full use of the magnetically controllable rheological properties of magnetorheological (MR) fluid, MR actuators have been applied in many engineering fields. To adapt to different application scenarios, parameters of MR actuators often need to be optimized. Previous MR actuator optimization was focused on finding optimal combinations of geom...
Article
The modeling of beam mechanisms, especially non-uniform beams, becomes complicated due to the geometric non-linearity that is proved to be significant with large deflection. A new method, called optimization algorithm-based approach (OABA), is proposed to predict the large deflection of uniform and non-uniform cantilever beams, in which an optimiza...
Article
Full-text available
Harvesting energy from the human body has attracted substantial attention from industries and academics as it is a promising solution to address the battery life issue. In this paper, we developed a bimorph piezoelectric bending beam-based energy harvester to scavenge energy from the human knee motion for powering body-worn electronics such as smar...
Article
Harvesting energy from human motions is a promising solution to the power issue for wearable electronics. Recently, various energy harvesters were developed to capture the motion of the lower limbs such as the rotary motion of the knee and ankle joints to generate electricity. However, these devices would increase the users' burden for walking and...
Article
Background: Lower limb assistive devices have been developed to help amputees or stroke patients. To precisely mimic the required function, researchers focused on how to estimate/predict the required knee angle for knee devices. Research question: The objective is to estimate the motion of the human knee joint during walking using the kinemati...
Article
In this paper, we design and experimentally validate a geometric nonlinear M-shaped tri-directional piezoelectric energy harvester. This harvester adopts a single structural design, which consists of a proof mass and a beam bent into an M shape with both ends fixed. Through structural parameter modification, the vibration directions of the first th...
Article
Due to low power consumption and fast response, magnetorheological (MR) dampers are widely used in various engineering applications. To enhance the performances, efforts have been made to increase the field dependent force with the same power consumption. However, the fluid viscous force is also increased significantly, which is undesirable in prac...
Preprint
Full-text available
Beam mechanism and beam theory have attracted substantial attention from researchers, as they have been widely used in many fields such as compliant mechanisms and soft robots. The modeling of beam mechanisms becomes complicated due to the geometric nonlinearity that is proved to be significant with large deflection. A new method, called optimizati...
Conference Paper
Full-text available
Due to low power consumption and fast response, magnetorheological (MR) dampers are widely used in various engineering applications. To enhance the performances, efforts have been made to increase the field dependent force with the same power consumption. However, the fluid viscous force is also increased significantly, which is undesirable in prac...
Article
Full-text available
Active transtibial prostheses, orthoses, and exoskeletons hold the promise of improving the mobility of lower-limb impaired or amputated individuals. Locomotion mode identification (LMI) is essential for these devices precisely reproducing the required function in different terrains. In this study, a terrain geometry-based LMI algorithm is proposed...
Article
Full-text available
In this study, a powered ankle-foot prosthesis driven by a nonlinear parallel elastic actuator (PEA) is developed and tested. A finite state impedance controller is utilized to identify the state of the prosthesis and then generate the reference for the control of the actuator. Note that the finite state machine used in the impedance controller is...
Article
Full-text available
The harvesting of energy from human motion for portable and wearable electronic devices has received considerable attention. This letter describes a lightweight macrofiber composite (MFC)-based energy harvester for capturing biomechanical energy through the natural motion of the human knee. In the proposed device, a slider-crank mechanism is used t...
Article
Full-text available
Commercial springs have linear characteristics. Nevertheless, in some cases, nonlinear behavior (e.g., nonlinear torque) is desired. To handle that, a cam-spring mechanism with a specified cam profile was proposed in our previous work. In this paper, to further study the cam profile generation, a new convenient design method is proposed. Firstly, t...
Patent
powered ankle-foot prosthetics for below-knee amputees
Article
Full-text available
In this paper, a powered ankle-foot prosthesis with nonlinear parallel spring mechanism is developed. The parallel spring mechanism is used for reducing the energy consumption and power requirement of the motor, at the same time simplifying control of the prosthesis. To achieve that goal, the parallel spring mechanism is implemented as a compact ca...
Conference Paper
Full-text available
In this study, based on human knee's kinetics, a smart prosthetic knee employing springs, DC motor and magnetorheological (MR) damper is designed. The MR damper is coupled in series with the springs that are mounted in parallel with the DC motor. The working principle of the prosthesis during level-ground walking is presented. During stance phase,...
Article
In this paper, a magnetorheological (MR) damper is optimally designed for use in smart prosthetic knees. The objective of optimization is to minimize the total energy consumption during one gait cycle and weight of the MR damper. Firstly, a smart prosthetic knee employing a DC motor, MR damper and springs is developed based on the kinetics characte...
Conference Paper
Full-text available
To improve the energy efficiency and downsize the powered ankle-foot prostheses (PAFP) but still provide sufficient instantaneous power output, elastic actuators (EAs) are widely used. Generally, there are two kinds of EAs: series elastic actuator (SEA), and parallel elastic actuator (PEA). Both of them can reduce the energy requirement and peak po...
Conference Paper
Full-text available
Shape memory alloy (SMA) has a property that when the temperature of SMA is stabilized, the fraction of Martensite phase keeps the same, and output force of SMA actuator also keeps constant. Based on that, a control strategy for set point force control of SMA actuators is proposed that during the process of driving, to stabilize output forces of SM...

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Projects

Projects (4)
Archived project
Design and testing a prosthetic finger that is driven by a hybrid actuator. The hybrid actuator consists of a DC motor and SMA actuator.