With the aging of society, the number of patients with limb disorders caused by stroke has increased year by year, it is necessary to introduce more advanced technology into the field of rehabilitation treatment. Reha...
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ISBN:
(纸本)9783319652894;9783319652887
With the aging of society, the number of patients with limb disorders caused by stroke has increased year by year, it is necessary to introduce more advanced technology into the field of rehabilitation treatment. Rehabilitation training based on the brain plasticity has been proved by clinical medical practice as an effective treatment method, and because of the serious lack of professional rehabilitation therapists, a large number of rehabilitation training robot have been designed so far. This article analyzed and described the research status on upper and lower limbs rehabilitation training robot, and at last the paper forecasts the future development trend of rehabilitation robot.
Despite an idea of robotic system teleoperation is a relatively old concept, here we present its enhancements heading to an interconnection of teleoperation and collecting relevant information from the environment whe...
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ISBN:
(纸本)9783319312934;9783319312910
Despite an idea of robotic system teleoperation is a relatively old concept, here we present its enhancements heading to an interconnection of teleoperation and collecting relevant information from the environment where robots act. This environment should be an intelligent space featured with various devices and sensors, which allows to obtain, preprocess and stores data in the cloud. Those data should provide relevant information for teleoperator or directly for robots, which act autonomously. For this purpose, we developed cloud-based tools, named Telescope v2. It is a platform-independent system for remote monitoring and controlling various systems. In this paper, we introduce this system, its abilities, and compare it with its network-based ancestor, Telescope v1. We analyze measurements of latency and response time when our new system is used for teleoperation in different places equipped with various Internet bandwidths.
Three-dimensional (3D) video involves stereoscopic and multi-view provides the viewer with a depth perception. In order to reduce the transmission data, multi-view video plus depth which are the combination of texture...
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ISBN:
(纸本)9781614998280;9781614998273
Three-dimensional (3D) video involves stereoscopic and multi-view provides the viewer with a depth perception. In order to reduce the transmission data, multi-view video plus depth which are the combination of texture image and associated depth map is applied. A limited number of views and corresponding depth maps are input to generate more intermediate virtual views for 3D display by view synthesis reference software. Due to the lack of ground truth, virtual view quality assessment is a difficult problem. This paper therefore proposes a novel reduced-reference quality assessment metric for synthesized virtual view by utilizing the edge similarity between undistorted and distorted synthesized view. Undistorted view edge is synthesized by uncompressed texture edge and depth map. Distorted edge is extracted from assessed virtual view. The results over multi-view video sets imply that the proposed metric can reflect virtual view quality and is highly consistent with full-reference metric.
In this paper, a method of biped walking on a slope is studied, taking the NAO humanoid robot as research object. Firstly, we adopt the 3D linear inverted pendulum mode (3D-LIPM) to generate walking pattern, and obtai...
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ISBN:
(数字)9783319652986
ISBN:
(纸本)9783319652986;9783319652979
In this paper, a method of biped walking on a slope is studied, taking the NAO humanoid robot as research object. Firstly, we adopt the 3D linear inverted pendulum mode (3D-LIPM) to generate walking pattern, and obtain the reference trajectory of the center of mass (CoM). Then the Denavit-Hatenberg (D-H) parameters of the leg chain are determined based on the analysis of the NAO leg configuration. Finally in the process of walking, an extended Kalman filter (EKF) via fusing sensor data is used to estimate the robot's CoM motion, in addition, an inverse kinematics (IK) controller is implemented which regulates the CoM position state in real time based on position tracking errors. On a slope with given angle, walking uphill and downhill experiments are conducted. The experimental results show that for the NAO humanoid robot, the deviation of walking direction can be controlled within 2 cm, so that it can keep walking stability for a long distance.
Simultaneous localization and mapping technology is the key technology of robot. It39;s now still challenging due to huge computational cost, rapid motion, non-texture environment, illumination fluctuations, etc. In...
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ISBN:
(纸本)9781538632604
Simultaneous localization and mapping technology is the key technology of robot. It's now still challenging due to huge computational cost, rapid motion, non-texture environment, illumination fluctuations, etc. In this paper, we propose a SLAM algorithm based on direct method similar to LSD SLAM. In our method, we adopt constant-velocity motion model to predict the camera pose of next frame and we demonstrate the model's function on avoiding tracking lost. Besides, we adopt inverse compositional method rather than forward additive method used by LSD SLAM to align image and experiments show that ours is more efficient. In addition, we optimize the map on Sim(3) to avoid scale-drift of monocular SLAM.
Considering the inherent safety and high flexibility, soft robot is drawing extensive attention from both industry and academics. Soft robots made of organic materials show the merits of considerably low cost and ease...
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ISBN:
(纸本)9783319652894;9783319652887
Considering the inherent safety and high flexibility, soft robot is drawing extensive attention from both industry and academics. Soft robots made of organic materials show the merits of considerably low cost and ease of fabrication. But, the precise control of soft robot is still of great challenge. A sophisticated understanding of the motion mechanics of organic soft robot is essential for accurate control of this type of robot. In this paper, PDMS/PEDOT:PSS system, which is developed for soft robot, is modelled and simulated using finite element method. Through parameters tuning, the dependences of PDMS/PEDOT:PSS system deformation on layer thicknesses and electrical current are acquired and compared with the experimental results available in reference. Furthermore, we proposed a three layer structure for soft robot, and investigated the relationship between deformation of this structure and layer thicknesses. Our work proposed an approach for precise control for soft robot through a combination of finite element simulation and experiment data. Additionally, the three layer structure we proposed is demonstrated to be a promising solution for high response speed soft robot.
Laser range finder (LRF) or laser distance sensor (LDS), further referred to as LIDAR (light detection and ranging). LIDAR can obtain environmental point cloud data, while a robot can realize environmental sensing by ...
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ISBN:
(纸本)9783319652924;9783319652917
Laser range finder (LRF) or laser distance sensor (LDS), further referred to as LIDAR (light detection and ranging). LIDAR can obtain environmental point cloud data, while a robot can realize environmental sensing by adoption of the point cloud data generated and LIDAR-based SLAM (Simultaneous Localization And Mapping) algorithm. The precision of point clouds provided by the LIDAR determines that of environmental sensing of the LIDAR-based mobile robot. In this paper, a common correction algorithm has been proposed to correct the inaccuracy of measured point cloud data caused by mobile LIDAR, effectively improving the precision of point cloud data measured by the LIDAR under a mobile state. It also conducts mathematical derivation of the algorithm, presents simulation and real world experiments performed and verifies the necessity and effectiveness of the algorithm derived by experimental results in the paper.
The minimally invasive surgical operation of intramedullary nailing has prevailed as a standard technique for a definite stabilizing treatment in femoral shaft fractures, and reduction is a critical step before carryi...
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ISBN:
(纸本)9783319312934;9783319312910
The minimally invasive surgical operation of intramedullary nailing has prevailed as a standard technique for a definite stabilizing treatment in femoral shaft fractures, and reduction is a critical step before carrying out an invasive operation. However, there are some disadvantages about this technology, such as the frequent radiation exposure for the operator and patients. This paper describes a novel cuff-type robotic-assisted femoral shaft fracture repositioning system, and preliminary discusses the constitutive modeling of passive transverse mechanical properties of skeletal muscle. Skeletal traction and fragments alignment for femur fracture reduction can be performed separately, which are standard procedures for surgeons in clinical. Correspondingly, the robotic system consists of distraction device, cuff-type reduction unit and remote control system. Preliminary experiments based on artificial models have been done, and the results show the effectiveness of the proposed robotic-assisted system, and indicate the potential value for further study.
Space debris has increased with recent launch missions greatly. Former active debris removal tests using space robot mainly focused on the fundamental technology of target recognition, motion control and path planning...
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ISBN:
(数字)9783319652986
ISBN:
(纸本)9783319652986;9783319652979
Space debris has increased with recent launch missions greatly. Former active debris removal tests using space robot mainly focused on the fundamental technology of target recognition, motion control and path planning. However, robot contacts directly with the surface of targets with large mass and angular momentum will cause severe collision problems. A target de-tumbling strategy is proposed in this paper by using two manipulators. Each arm is equipped with magnetic coil, which can generate eddy current in conductive targets and gradually de-tumble rotation without contact. The three-dimension rotation model of a discarded satellite and upstage is established based on its distribution of the moment of inertia and the safe working space of the robots is calculated. By analyzing the point of application and direction of the magnetic force, an optimized de-tumbling trajectory for the robot is presented to minimize the de-tumbling time by reducing the targets' angular momentum. At last, a simulation is processed to verify the optimized de-tumbling method.
In order to solve the problem of poor consistency and low processing efficiency of artificial grinding, this paper establishes a six-axis robot automatic grinding platform. In the first section of the paper, the quali...
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ISBN:
(纸本)9783319652924;9783319652917
In order to solve the problem of poor consistency and low processing efficiency of artificial grinding, this paper establishes a six-axis robot automatic grinding platform. In the first section of the paper, the qualitative relationship between the process parameters and the grinding quality could be learned from the single factor experiment, and the primitive range of the process parameter domain is obtained. On the basis, an orthogonal experiment is carried out, and a quantitative regression empirical model is established. Then the parameter sensitivity function is deduced based on the model. In regards to the grinding quality and stability constraints, the process parameter domain optimization is carried out. Finally, considering the influence of grinding attitude, the optimal attitude angle is found in the range of process parameters. The results show that the blade grinding system and the grinding scheme are effective.
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