Lower limb exoskeleton robot and its cooperative control: A review, trends, and challenges for future research

Effective control of an exoskeleton robot (ER) using a human-robot interface is crucial for assessing the robot's movements and the force they produce to generate efficient control signals. Interestingly, certain surveys were done to show off cutting-edge exoskeleton robots. The review papers that were previously published have not thoroughly examined the control strategy, which is a crucial component of automating exoskeleton systems. As a result, this review focuses on examining the most recent developments and problems associated with exoskeleton control systems, particularly during the last few years (2017–2022). In addition, the trends and challenges of cooperative control, particularly multi-information fusion, are discussed

Microgrid design for disadvantaged people living in remote areas as tool in speeding up electricity access in Rwanda

Across many developing nations, such as Rwanda, the absence of electricity has significantly reduced the economic impact of rural communities. A common practice in some locations is to process farm products using locally fabricated machines, which diminishes the quality and quantity of production while simultaneously increasing the danger of illness. Recent studies suggest that hybrid power systems, such as those based on renewable energy sources, could support the development of a climate change adaption and low-emission economy in a post-pandemic future. According to this study, the current electrification rate and the variables that restrict electricity access speed are investigated, and some solutions to overcome these issues are proposed. According to the findings of this study, the connection of rural areas is delayed by the presence of remote and low-density villages, because the access to the utility transmission lines is both expensive and complex. For this reason, the study proposes a novel microgrid design where it suggests an installed solar PV mobile mini-grid that can provide a group of households with energy, so enabling them to obtain economical and environmentally friendly energy. Results have proven that the proposed model is an adjustable and expandable generation and distributed storage. To a greater extent, the installation of a single device at a residence can even result in the establishment of an expandable DC microgrid, which then can develop in a cost-efficient manner when additional neighbors are joined to the grid. Eventually, the microgrid will be able to alter the way in which processing equipment is utilized. The solution is also expected to contribute to the advancement of clean technology in the pursuit of universal electrification

Microgrid design for disadvantaged people living in remote areas as tool in speeding up electricity access in Rwanda

Across many developing nations, such as Rwanda, the absence of electricity has significantly reduced the economic impact of rural communities. A common practice in some locations is to process farm products using locally fabricated machines, which diminishes the quality and quantity of production while simultaneously increasing the danger of illness. Recent studies suggest that hybrid power systems, such as those based on renewable energy sources, could support the development of a climate change adaption and low-emission economy in a post-pandemic future. According to this study, the current electrification rate and the variables that restrict electricity access speed are investigated, and some solutions to overcome these issues are proposed. According to the findings of this study, the connection of rural areas is delayed by the presence of remote and low-density villages, because the access to the utility transmission lines is both expensive and complex. For this reason, the study proposes a novel microgrid design where it suggests an installed solar PV mobile mini-grid that can provide a group of households with energy, so enabling them to obtain economical and environmentally friendly energy. Results have proven that the proposed model is an adjustable and expandable generation and distributed storage. To a greater extent, the installation of a single device at a residence can even result in the establishment of an expandable DC microgrid, which then can develop in a cost-efficient manner when additional neighbors are joined to the grid. Eventually, the microgrid will be able to alter the way in which processing equipment is utilized. The solution is also expected to contribute to the advancement of clean technology in the pursuit of universal electrification

A design of lower limb rehabilitation robot and its control for passive training

Artificial intelligence-based rehabilitation robots can be applied for peoples with lower limb motor dysfunction usually caused by accident, war, sports, spinal cord injury, paralysis, and vascular diseases to enhance the motion ability of their lower limbs. A design of lower limb rehabilitation robot as well as its trajectory tracking which is suitable for passive training of patient with paralyzed or weak limbs have been presented in this paper. The contents were well organized and presented. Also, the experimental procedural setup of the lower limb rehabilitation robot is well described and conducted. Initially, AC servo motor was chosen as the actuator for controlling the robot due to good stability, fast response, low noise, wide speed range, low cost, high efficiency, and low maintenance. The corresponding simulation analysis of the actuator shows that it is good and can meet the design requirements. Secondly, the motion control of the robot was investigated using the kinematics model of the hip and knee transmission subsystem, the human hip and knee trajectory curves, the motion control data generation process, the planning target track, and the required servo motor drive pulse control instruction. Finally, the control experiments were conducted such that the pulse signal of the servo shaft rotational angle is received by the servo drive for pitch control in position control mode. By default, a complete rotation of 0.072 degrees corresponds to 500 pulses of the motor rotation time control. The experimental results show that by using PID controller, the actual trajectory is closer to the desired trajectory closely follows the actual trajectory and hence, demonstrated a promising patient's recovery