Soft robots offer interesting features and can be manufactured cheaply using widely available lab equipment. However, with increasing robot complexity, the manufacturing process often becomes expensive, requires sophi...
ISBN:
(数字)9781728165707
ISBN:
(纸本)9781728165714
Soft robots offer interesting features and can be manufactured cheaply using widely available lab equipment. However, with increasing robot complexity, the manufacturing process often becomes expensive, requires sophisticated or experimental tools, highly skilled technicians and time. In this paper, we propose an alternative approach for the fabrication of soft pneumatic fiber-reinforced actuators. With the new design, a scaffolding to reinforce the actuator is printed inside a single-use mold. The mold is injected with silicone and broken apart, while the reinforcement detaches from the mold and remains within the actuator. Using flexible filaments such as nylon allows for the resulting actuators to be not only compliant but also squeezable. Our approach reduces the needed work effort and requires virtually no manufacturing skills when compared to current labor-intensive fabrication techniques. It also does not require any equipment other than an affordable, single nozzle desktop 3D printer. In the paper, we presented the design and fabrication process of different types of modules: linearly extending, bending and a manipulation module. We have compared the new instant design and the previous fiber-reinforced design in terms of bending, elongation and generated forces.
Soft robotics holds enormous promise for a wide class of applications. However, system controllability, bandwidth, portability, and energy efficiency of soft robot power supplies are often inadequate. Soft robotics de...
ISBN:
(数字)9781728165707
ISBN:
(纸本)9781728165714
Soft robotics holds enormous promise for a wide class of applications. However, system controllability, bandwidth, portability, and energy efficiency of soft robot power supplies are often inadequate. Soft robotics desperately needs improved solutions to drive soft actuators either pneumatically or hydraulically. This research paper offers a contribution to bridge this gap. It deals with small-scale power supplies for hydraulically-driven soft robots based on fluidic elastomer actuators in the power range 5-400 W. A design procedure for such power supplies is developed with an emphasis on highbandwidth control. The performance requirements are established based on a literature survey, and design alternatives are discussed. Then, a prototype consisting of a 0.102 cm 3 /rev positive-displacement, external gear pump directly driven by a 70 W brushless dc motor is built and experimentally characterized. control of the targeted soft robots results possible because the proposed power supply has high-bandwidth varying between about 12 and 30 Hz (i.e., well above the actuators' mechanical frequency). The power supply's energy efficiency is also measured, and areas for its improvement are identified. The proposed solution is feasible, applicable to autonomous soft robots, scalable to the power levels of interest, and possibly useful for both tethered soft robots and rigid/semi-rigid robots.
Autonomous mobile robots have been widely used to perform specific tasks in recent decades. Map accessibility analysis is necessary for those robots to achieve safe and efficient path planning and navigation, especial...
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This paper aims at obtaining a stable and rapid-responsive controller for quadrotor aerial robots with unknown or changeable mass. Based on Newton-Euler formula, integral backstepping method and fractional-order PI/PD...
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ISBN:
(纸本)9781450365307
This paper aims at obtaining a stable and rapid-responsive controller for quadrotor aerial robots with unknown or changeable mass. Based on Newton-Euler formula, integral backstepping method and fractional-order PI/PD control, an adaptive flight control strategy is carried out in Matlab with Lyapunov stability theorem to ensure its stability. The control strategy includes cascade fractional PI/PD control for rotational loop and integral backstepping control for translational loop. Through the comparison with conventional PID flight controller, main criteria for performance as setting time, maximum overshoot and steady-error show its improvement. After validating the proposed control system and controller tuning with several meta-heuristic algorithms, results from non-linear simulation verify the effectiveness and robustness for hovering or near hovering (near quasi-stationary) flight of quadrotors.
This paper presents a robotic arm for evaluating the multiple-physical information sensing array for the purpose of detecting the edge of blood clots and tumors. The robot arm has six degrees of freedom, of which the ...
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This manuscript describes the design methodology of a lower limb bipedal robot which was controlled to achieve a stable walking gait. The proposed design has 12 DOF to mimic human gait in the most daily living activit...
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ISBN:
(纸本)9781538695944
This manuscript describes the design methodology of a lower limb bipedal robot which was controlled to achieve a stable walking gait. The proposed design has 12 DOF to mimic human gait in the most daily living activities. The design process started by creating dynamically equivalent lower limb segments based on the human anthropometric data. A linear inverted pendulum model of human walking was developed to produce the trajectory of the robot center of mass (COM), and then generate the feet trajectories, as well as applying inverse kinematics model. An iterative optimization algorithm was used to find the angular correction. The system was simulated on MATLAB/SIMULINK simulation environment and the results were satisfactory.
Electronic equipments may be disturbed by electromagnetic pulse during operation in some fields. Gas discharge tube is usually added as surge protection device to protect electronic equipment from electromagnetic puls...
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ISBN:
(纸本)9781450365307
Electronic equipments may be disturbed by electromagnetic pulse during operation in some fields. Gas discharge tube is usually added as surge protection device to protect electronic equipment from electromagnetic pulse. Electromagnetic pulse current injection experiment is used to test gas discharge tube's protective characteristics. In order to reduce experimental times and guide experimental process, Elman neural network was used to predict electromagnetic pulse responses of gas discharge tube. Elman neural network is a recurrent neural network with local memory units and local feedback connections. Experiments showed that the Elman neural network model on gas discharge tube at different grades of voltage injection experiments have had better prediction results.
Infrared and visible image fusion plays an important role in military and civilian applications. However, most methods are focus on simple general scene, which only contains one person alone or a few buildings. It is ...
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ISBN:
(纸本)9781450365307
Infrared and visible image fusion plays an important role in military and civilian applications. However, most methods are focus on simple general scene, which only contains one person alone or a few buildings. It is not enough to fully reflect the diversity and complicated of reality. This paper presents a new fusion method for infrared and visible images based on saliency detection and guided filter, aiming to obtain a synthetic image that is suitable for human visual perception in complicated street scenes. The proposed method employs the saliency detection to extract target region from infrared images. Each image is decomposed into a base layer and detail layers based on a multi-scale decomposition through guided filter. Experimental results demonstrate that our method can achieve a superior performance compared with previous image fusion methods in both subjective and objective evaluation.
In autonomous transport systems, it is useful to be able to continue interrupted traffic after removing the obstacle that caused deviations from the route. This article describes a control model in which cognitive fun...
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In autonomous transport systems, it is useful to be able to continue interrupted traffic after removing the obstacle that caused deviations from the route. This article describes a control model in which cognitive functions, such as context and attention are embedded. The fuzzy situational control model of an autonomously moving machine along a route with obstacles is expanded by tracking context and switching attention mechanisms. Additionally, it describes a knowledge representation about the route, the surrounding space and how to avoid collisions with obstacles. (C) 2019 The Authors. Published by Elsevier B.V.
A major population of 3rd world countries have problems reading out texts because of the low literacy rate. While smartphones have given them a hope to lead a better life, interacting with them needs a certain level o...
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