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Introducing dummy slots is often applied to reduce cogging torque in permanent magnet synchronous machines. Although this solution always helps for smooth operation, its influence on noise and vibration (NV) performance needs more focused analysis. This paper employs two surface-mounted machines to investigate the effect of dummy slots, one of which is a 10-pole/12-slot machine (M1) with few magnetic-field...
Rhytidectomy is an important research field of current beauty industry. Stretching wrinkles with an uniformly distributed pressure is a widely-used strategy. In this work, in order to evaluate the influence of the strategy on forehead skins, a numerical simulation of stretching forehead wrinkles was performed. By calculating the stretch ratio and stress in the stretching process, we found that stretching...
Copper wire bonding is being developed rapidly in recent years to replace expensive gold wire for electronic packaging. However, one issue about reliability in humidity environment causes risk in its application. The copper wire-aluminum pad interface degradation usually leads to electrical open failure. Present paper studied all the 5 factors including pad finish of chip, molding compound, wire bonding...
The poly(aniline)(PANI) which is a conductive polymer was blended to general-purpose polymer (polystyrene PS). Then, the PANI/PS blend films of gradient distribution composing of each component under casting conditions from polymer blend NMP solutions by using self-organization based on non-equilibrium phenomena. Electric properties of the films were examined by conducting Atomic Force Micro scope...
The single-motor multiple DOFs under-actuated finger is the focus of robot research. The grasping force of traditional under-actuated hands based on linkages is hard to control. The traditional hands also have many differences from human hands in appearance. Aiming to solve these problems, this paper has presented a novel under-actuated hand based on linkages, which also comprises of slider mechanisms...
Based on the analysis of the development of recent robotic hands, proposes the design of a new under-actuated humanoid hand, the object seized drives the first segment slip inside under the forces applied by the other active joints or fingers, thus the first segment presses the active link to rotate and consequently make the second segment rotate through the passive link. This paper also evaluates...
This paper proposed a novel concept of indirect under-actuation with tendon-slider mechanism. A mechanical finger with the mechanism was designed and integrated into a humanoid robotic hand-TH-2T Hand. The tendon-slider under-actuated finger proves simple but works well. In the design of the finger, the reaction force against a slider in the base segment produced by the grasped object was adopted...
Compared with traditional dexterous humanoid robotic hands, underactuated robotic hands have the advantages of self-adaptive grasp and easy real-time control. In this paper, the development of a novel underactuated robotic hand is presented. This hand has five fingers and through using underactuation, the self-adaptability of each finger is achieved. This underactuated humanoid robotic hand can accomplish...
According to the shortcomings of traditional reinforcement learning method when applied to autonomous underwater vehicle (AUV) engineering, such as generalization problem, risks by trial-and-error a low learning efficiency, the neural network and case based Q learning (NCQL) is proposed. The basic principle of NCQL is making use of neural net to solve generalization problem, and case based learning...
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