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Eccentric paddle mechanism (ePaddle) is a novel locomotion mechanism designed for amphibious search and rescue tasks. The ePaddle is able to enhance the mobility of amphibious robots for multi-terrains tasks. Based on the principle of ePaddle and the experiments on the prototype, an improved mechanism named ePaddle-EGM is proposed in this paper. The ePaddle-EGM is based on the epicyclic gear mechanism,...
High precision rotational alignment is of key importance in micro/nanopositioning or micromanipulating applications. This paper presents a novel rotary micropositioning stage with remote center of motion (RCM) characteristic. Compared with conventional rotary guiding mechanism, the proposed double-parallelogram mechanism (DPM) possesses pure rotational motion along with a compact structure. Based...
In this paper a medical robot based on a 3-RPS parallel platform is presented for providing correct screw path in transpedicular fixation surgery. For improving the accuracy of the robot, a calibration approach for 3-RPS with CMM (Coordinate Measuring Instrument) data is developed. Sensitivity analysis of the error source had been done with Monte-Carlo techniques. The results show that the length...
In this paper, a CAN-bus based distributed control system for a blocking plate manipulation robot is developed to meet the requirements of operating environment in nuclear power plants. In terms of the architecture for the control system, hardware and software for this robot is designed and implemented. Safety design is particularly mentioned as a vital ensurance of the robot system. Absolute positioning...
Recently, there have been many studies for developing robots that perform tasks instead of humans. In this study, we focus on tasks to be performed at high places above the ground, which can be dangerous and costly. Therefore, a robot having the ability to climb a wall is preferred for an automatic maintenance system, instead of humans. This paper reports the development of a wall climbing robot which...
This paper presents the structure design and analysis of a novel compliant gripper based on the Scott-Russell (SR) mechanism. An SR mechanism in combination with a parallelogram mechanism enables the achievement of a pure translation of the gripper tips, which is attractive for practical micromanipulation and microassembly applications. As compared with traditional pure-translation grippers, the reported...
The posture-adjustable turntable is playing an important part in testing equipments and other industrial devices. As well known, universal joint is employed to couple two parts that are aligned with a certain angle to transmit torque and speed. There are three major parts in a U-joint: active hinge, cross shaft, and passive hinge. Power is transmitted from the active hinge to the passive hinge via...
This paper presents an electrical powered transfemoral prosthesis. The knee joint is actuated by a motor-driven ball screw assembly and the ankle joint is motioned by a series elastic actuator. An undirectional spring is attached paralleled with the SEA to store energy during dorsiflexion and bias load of ankle torque. To mimic biomechanical gait data and make the prosthesis compact and anthropomorphic,...
This paper describes a squeegee device for a manual microassembly system. The device consists basically of a height axis, of a squeegee clamp, and of a squeegee blade. The squeegee device is connected via a supporting arm to the base frame of a microassembly system. The objective of this work is to obtain a homogenous, thin, and defined adhesive layer for piezoelectric actuators which are used in...
There are many space servicing tasks for space robots. With a single end effector, the space robot even can not meet the operation requirements of individual task. The space robot system has a self-relocating main manipulator arm and a dexterous robot arm to perform the tasks. To mount/de-mount payloads and tools, interfaces between the end effector and payloads/tools are standardized using grapple...
This paper describes the design and implementation of a two-dimension motion platform equipment, which can meet the requirements to simulate the vibration of the real vehicle. According to the modeling and simulation of vehicle trajectories, the mechanical structure of the platform has been designed, and a motion controller has been developed based on DSP and ARM, with corresponding motion control,...
Since the intricate and dangerous working environment of steam generator, it's risk for workers to complete fastening bolts of blocking plate. The paper introduces a fastening bolt method based on image recognition. The mechanical structure and control system were proposed gradually to be a carrier for the method. Then the image recognition adapted the Canny algorithm to realize the image binaryzation...
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