Research on Size Synthesis Optimization Design of a Bionic Exoskeleton for Index Finger Rehabilitation

This paper presents a novel wearable robotic hand exoskeleton named ReHand-II for post-stroke rehabilitation. To ensure the consistency of rotation between exoskeleton joints and index finger joints and to realize reasonable range of movement, the kinematics models of left index finger and the exoskeleton are established. And design variables,constraints and objective function are determined. The size synthesis optimization design is realized. Ultimately the size value of each component parameter is determined. The hand exoskeleton is developed according to the results of the optimization. Finally, ReHand-II shows better bio-imitability and Wearable adaptability by wear experiment results.

μ-Synthesis Control of Photovoltaic System

Traditional control methods are usually difficult to achieve a good compromise between nominal performance and robust performance, in order to improve the flexibility and robustness of the PV power grid-connection system without affecting its nominal performance, aiming at the effect on flexible PV power grid-connection by component parameter perturbation, a μ-synthesis robust control method of flexible grid-connection of photovoltaic power based on model matching is proposed. Model matching problem including the actual controlled objects like inverters, is transformed into a generalized system with uncertainty block being abstracted, thus further is attributed to a structured uncertainty problem, which can be solved by DK iteration. The μ-analysis and simulation results show that the designed μ-synthesis controller, makes the robust performance of the closed-loop system satisfied, and advantages are especially more obvious in the case of system component parameter perturbation.

The Application of Multisim in Electronic Technology Teaching

The paper introduces the method by the way of applying Multisim in the course of the basic data electronic technique.We can find that the Multisim has a good perspective. Its ability of changing the circuit and component parameter can help us to know about its different characteristics of electronic circuit. It also will become a tool to train the students actual ability. To use the computers to design EDA will be a good direction in the course of electronic teaching.