Abstract Dyskinesia of the upper limbs caused by stroke, sports injury, or traffic accidents limits ability to perform activities daily living. Besides necessary medical treatment, correct and scientific rehabilitation training for injured joint is an important auxiliary means during treatment effected limb. Conventional upper-limb robots have some disadvantages, such as a complex structure, poor compliance, high cost, portability. In this study, novel soft wearable limb robot (SWULRR) with...

Web structure is a flexible widely used in animal predation behavior and human hunting work, which exhibits an excellent capability of gripping objects stably securely. Inspired by the spiders, this article, we present bioinspired cobweb soft gripper, named WebGripper, takes on form like spider web before grasping object presents entangling state snake after object. These characteristics result broad adaptability to various enhanced stability. The design concept, principle, fabrication...

Abstract The parallel mechanisms (PMs) with configurable platforms have the advantages of flexibility, high speed, and extra operability over PMs common platforms. This paper proposes a systematic approach for synthesizing three-degrees-of-freedom (3-DOF) translational one translation DOF (TPMs-T) based on finite screw. motion relationship between platform limbs is discussed to achieve requirement TPMs-T limbs. equivalence principle kinematic joints further pinpointed, series lower mobility...

How to further improve the dexterity of continuum robots so that they can quickly change their structural size like flexible biological organs is a key challenge in field robotics. To tackle this challenge, paper proposes soft-rigid coupled bioinspired elephant trunk robot with variable diameter, which enabled by combining soft motion mechanism novel rigid variable-diameter (double pyramid deployable mechanism). The integration these two mechanisms has produced three significant beneficial...

Rigid-flexible-soft coupled robots are an important development direction of robotics, which face many theoretical and technical challenges in their design, manufacture, modeling. Inspired by fishbones, we propose a novel cable-driven single-backbone continuum robot has compact structure, is lightweight, high dexterity. In contrast to the existing robots, middle backbone serially formed multiple cross-arranged bioinspired fishbone units. The proposed unit, having good one-dimensional bending...

In order to evaluate the transverse thickness difference of cold-rolled strips according information hot-rolled and scientifically guide setting indicators silicon strip, influence model about relation strip profile is established in this paper based on simulation results. The predicted have strong correspondences measured data. Based statistical analysis data, control criterion steel requirements for are finally recommended. results show that quadratic nonlinearly related wedge crown strip....

Seamless flatness rollers are the core equipment for cold-rolled strip detection. The change in wear resistance of roller surface-strengthened layer has important guiding significance prediction surface life. experimental results five rounds friction and testing show that volume–wear rate original is only 1.85 × 10−6 mm3 (N·M)−1. After first grinding, decreased was approximately 2.76 second morphology, samples each round showed little difference. average last three test 3.56 (N·M)−1...

Compared with the sectional roller flatness meter, integral meter is more suitable for products higher requirements on surface quality, and thus becomes trend of contact-type cold rolling. Due to its structure design, some problems arise. Under action dead weight or an external load, deflection deformation changes stress state sensor installed inside it generates additional signal. This paper studies mechanism signal recognition elimination method. First, according detection connection mode...

A novel series of chiral dopants synthesised from (S)-1, 2-propanediol and mesogenic carboxylic acids were characterised by Fourier transform infrared 1H nuclear magnetic resonance, their helical twisting properties investigated doping the into a nematic liquid crystal host (SLC-1717). The results showed that values molecular power β significantly dependent on nature terminal substituents, alkyl length numbers centres in structure. Compared to compounds with electron-with-drawing groups...

Contact-type flatness meters are the key detection equipment in production of high-end cold-rolled thin strips. The surface performance a meter roller is very important to improve its service life and ensure quality strip products. To wear resistance prolong seamless roller, it was subjected strengthening treatment by laser cladding an Fe-based wear-resistant alloy. strengthened quenching determined tests. results show that cladding-strengthened layer forms solid metallurgical bond with...

Abstract The evaluating mechanical performance of Π-conjugated Polymer films has important significance for application in the micro electronic devices. In this work, authors studied polymer, poly[2-methoxy-5-(2’-ethyl hexyloxy)-phenylene vinylene] used nanoindentation technique at room temperature and discussed effect experimental parameter on effective elastic modulus hardness MEH-PPV film. result indicates estimating using O & P formula are correlative with load, holding time, loading...

The purpose of this study was to investigate the value spectral CT monoenergetic imaging for detecting hemoglobin levels.Sixty-five hospitalized patients received chest non-contrast scan in gemstone (GSI) mode on a GE Discovery CT750 HD. This approved by hospital ethics committee and informed consent signed every patient. Raw data were reconstructed at 1.25 mm then transferred AW4.4 workstation. ascending aorta 40 keV∼140 keV measured under GSI viewer AW4.4. Hemoglobin contents biochemically...

This study proposes a novel variable air pressure supply structure based on the electromagnetic effect. can be implemented in various soft robots driven by pressure, including pneumatic artificial muscles, grippers, and other robots. The structure's main body comprises hollow circular tube, magnetic piston arranged an solenoid nested outside tube. is designed with special winding power access modes, generating either attractive force or repulsive piston. conforms expectation tube changing...

Purpose The purpose of this paper is to solve the problem that mobile robots are still based on reactive collision avoidance in unknown dynamic environments leading a lack interaction with obstacles and limiting comprehensive performance robots. A window approach multiple strategies (DWA-MIS) proposed problem. Design/methodology/approach algorithm firstly classifies moving obstacle movement intention, which rule function designed incorporate positive incentives motivate robot make correct...

Summary Here, we propose a novel nonfragile predictive control method for an omnidirectional rehabilitative training walker. The aim of the study was to design tracking controller that includes simultaneous constraints on errors in position and velocity order guarantee safe system states uses incremental solve optimal quadratic program problem. exponential stability is guaranteed by constructing trajectory‐tracking error velocity‐tracking error. Simulation experimental testing were conducted...

Rope saw technology played an important role in the field of high hardness material processing due to cutting efficiency, low equipment costs, energy saving and environmental protection. However, traditional wire saws can often become too slack for beaded rope cut reduced tension during process. A new diamond bead adaptive adjustment method is proposed based on conventional saw. Firstly, three-dimensional structure self-adjusting modeled by SOLIDWORKS. Secondly, modal analysis ANSYS....

Cell manufacturing system is suitable for wide-variety product manufacturing. However able workers are needed in order to realize the cell system. To solve this problem, robot researched recently. For manufacturing, not only advanced intelligence but also excellent hardware such as actuators necessary. In report, an actuator hand proposed. Experimental device of proposed designed and assembled. The motion observed it confirmed that can control position speed output. This experimental result...