This paper presents a study on developing a new exoskeleton for ankle joint rehabilitation with three degrees of freedom (3 DOFs). The primary attention is paid to the process of designing and modelling the device aimed at restoring the lost functions of joint mobility. The authors conducted a complex analysis of the functional requirements of the exoskeleton based on research into the potential user’s needs, which allowed for the development of a conceptual model of the proposed device. In this study, a prototype of the exoskeleton is designed using modern additive technologies. The prototype underwent virtual testing in conditions maximally close to reality, which confirmed its effectiveness and comfort of use. The main results of this study indicate the promising potential of the proposed solution for application in rehabilitation practices, especially for patients with ankle joint injuries and diseases.

Robotics with exoskeletons has opened a new era of research in the field of modern rehabilitation and assistive technologies. The technology promises to improve the functionality of the upper limbs, which are necessary for daily operations. Exoskeleton technology is developing rapidly but requires interdisciplinary research to solve technical problems such as kinematic compatibility and the development of effective human-robot interaction. This article presents a new design of a device that helps to rehabilitate the upper extremities. The proposed design is characterized by a lightweight structure with an adaptable geometry for various users with low cost and easy to wear characteristics. The CAD model is developed for design details and for modeling, the results of which provide data on the feasibility of the proposed design and its characteristics in the main operational characteristics.

With the increasing prevalence of neurological and musculoskeletal disorders, the demand for effective rehabilitation technologies has grown. This study presents the AlmatyExoElbow system with a cable-driven exoskeleton for elbow rehabilitation with two degrees of freedom. The device was designed in SolidWorks CAD and tested in SolidWorks Motion to evaluate flexion/extension and pronation/supination trajectories. The design is simple, adaptable, and cost-effective, making it a promising candidate for future clinical integration and personalized therapy.

Affordable, sensor-driven lower-limb prostheses remain scarce in middle-income health systems. We report the design, numerical justification, and bench validation of a semi-active transfemoral prosthesis featuring surface electromyography (EMG) control and inertial sensing for low-resource deployment. The mechanical architecture combines a titanium–aluminum–carbon composite frame (total mass 0.87 kg; parts cost < USD 400) with topology optimization (SIMP) to minimize weight while preserving stiffness. Finite-element analyses (critical load 2.94 kN) confirmed structural safety (yield safety factor ≥ 1.6) and favorable fatigue margins. A dual-channel sensing scheme—surface EMG from the rectus femoris and an IMU—drives a five-state gait finite state machine implemented on a low-power STM32H platform. The end-to-end EMG→PWM latency remained <200 ms (mean 185 ms). Bench tests reproduced commanded flexion within ±2.2%, with average electrical power of ~4.6 W and battery autonomy of ~5.7 h using a 1650 mAh Li-Po pack. Results demonstrate a pragmatic trade-off between functionality and cost: semi-active damping with EMG-triggered control and open, modular hardware suitable for small-lab fabrication. Meeting target metrics (mass ≤ 1 kg, latency ≤ 200 ms, autonomy ≥ 6 h, cost ≤ USD 500), the prototype indicates a viable pathway to broaden access to intelligent prostheses and provides a platform for future upgrades (e.g., neural network control and higher-efficiency actuators).

This paper presents the design and preliminary structural assessment of a cable-driven elbow exoskeleton, AlmatyExoElbow, intended for upper-limb rehabilitation. The proposed system employs a modular architecture to improve biomechanical compatibility while reducing distal segment mass. The exoskeleton provides two degrees of freedom, including flexion-extension and forearm pronation-supination. A cable-driven mechanism enables remote actuator placement and reduces parasitic loading associated with mechanical-anatomical axis misalignment. A 3D CAD model was developed and evaluated using finite element analysis in SolidWorks Simulation. Stress, displacement, and strain distributions were analyzed to identify critical structural regions and guide future design optimization. The results provide an initial assessment of the proposed concept and support further development of rehabilitation-oriented elbow exoskeleton systems.

Жылу электр станциясының ағынды суларын озонмен тазартуға арналған эксперименттік қондырғы әзірленіп, сынақтан өткізілді. Бұл қондырғыға озон өндіретін электрондық жүйе орнатылды, сондай-ақ, электр өлшеу құралдары, «ОЗОН-5-200» газ анализаторы, ауа шығынын есептегіш және 0,5 литрлік тазартылатын ағынды суға арналған реактор қосылды. Тәждік тосқауыл разрядында жұмыс істейтін озонатордың электрлік және озон шығару сипаттамалары эксперимент арқылы зерттеліп, озонның өнімділігі мен меншікті энергетикалық шығымы анықталды. Сондай-ақ, ағынды суларды озонмен тазарту процесінің нәтижелері талданып, техникалық-экономикалық тиімділігі бағаланды.