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In this study, a general U-model based design procedure is expanded to super twisting control of nonlinear polynomial systems, which is named as U-super twisting control in short. A discrete time super twisting reference model is proposed with proper convergence precision and convergence time for nonlinear dynamic plants including non-affine systems. Two bench test examples (non-affine plants which...
Omnidirectional mobile robots have been widely developed due to its high maneuverability in a narrow workspace. However, there are two main shortcomings: vibration and low load bearing capacity, always with the omnidirectional wheel. At present, no a unified method is absent to analyze the performance of omnidirectional wheels systematically. In this paper, a fission model is established to study...
By collecting the human original surface electromyography (sEMG), a dynamic model of human elbow joint was established with sEMG as the input. Firstly, according to the theory of muscle fiber slippage and the characteristics of the internal viscous force of the muscle, the skeletal muscle force model was built about physiological structure and micro mechanical properties. Secondly, by modeling the...
A mechanism synthesis method on redundantly actuated branched chain of symmetrical unconstrained branched chain parallel mechanism was put forward in this paper, and the redundantly actuated branched chain and its number of the lower-mobility parallel mechanism with 4 degrees of freedom (DOF) were synthesized. First the brached chain with less rods of one line vector, one couple and mixture of line...
Localized laser bonding using a glass frit intermediate layer is an ideal technology to hermetically package miniature devices without heating the function components. It is important to describe the laser energy transmission and absorption in glass frit when modeling heat transfer in transmission laser bonding of glass to glass. Excess energy leads to over-burning of the glass material and deficit...
Localized laser bonding using a glass frit intermediate layer is an ideal technology to hermetically package miniature devices without heating the function components. It is important to describe the laser energy transmission and absorption in glass frit when modeling heat transfer in transmission laser bonding of glass to glass. Excess energy leads to over-burning of the glass material and deficit...
In the complex unstructured road, mobile robots' ability to resist overturning is crucial. In this paper, a tracked mobile robot with passive deformation is developed based on the request of unstructured environment to the robots' movement. The robot can improve stability and the ability to resist overturning by the deformation of passive adaptive mechanisms. A comprehensive judge was made on the...
Recently the active-matrix organic light-emitting diode (AMOLED) has emerged as a very promising flat-panel display technology because of its potential widely application for the development of high resolution and flexible full color flat panel displays. However, the encapsulation of AMOLED is studied and developed due to the top-emission structure used in AMOLED. Different from the bottom-emission...
Electronic packaging industry widely uses a dispensing technology to deliver adhesive materials on substrates through a dispensing system. The cured adhesives can encapsulate and connect chips and substrates to provide mechanical, physical and chemical protections. For the high density packaging, a jet dispensing is regarded as the next generation adhesive delivery technology due to its features of...
For micromilling to be used in the manufacturing of glass-based devices, further machining research is required to find optimum cutting configurations to produce high quality micro-scale features. It is not only extremely expensive but also difficult to investigate machining mechanism by means of various experiments. In this paper, the effect of cutting condition on cutting mechanics is numerically...
Partial occlusion is a difficult problem in computer vision since whether the object is changed or occluded is ambiguous, especially when distinguishing it only from the object boundary. In this paper, we proposed a novel idea to solve this problem by taking shape matching as a morphing processing. A mass-spring model is constructed from the point set which is sampled from a template (or reference)...
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