Introduction Visual feedback is an effective method to enhance postural and balance control in clinical and sports training. The aim of this study was to explore the effect of real-time visual feedback provided by a video camera on the performance of a dynamic balance test, which is the star excursion balance test in healthy subjects. Methods We compared the performance of the star excursion balance test using the maximum reach distance in 20 healthy participants (10 male and 10 female, 26.8 ± 3.7 years) under two conditions: without feedback and whilst they viewed their movements in real-time on a screen in front of them via a video camera. Results The results showed that real-time visual feedback had a significant effect on maximum reach distance of the star excursion balance test in the posterolateral direction (P < 0.001). There was a non-significant increase in the maximum reach distance in the anterior and posteromedial directions. Conclusion The result indicates that the real-time visual feedback appears to be an effective means for improving the performance of the star excursion balance test in the posterolateral direction, and may be a promising tool for clinical rehabilitation and athlete training to enhance dynamic postural control.
Aiming at the problems of the existing battery test system, a EV battery test platform with high degree of simulation is designed, based on the upper and lower computer structure after a lot of analysis. The PC software is also compiled, which could simulate the real road status, or to control the battery to discharge with constant current or constant power, by the communication with the lower computer through 485 bus and CAN bus. The corresponding control method to realize the discharging test with constant current is designed, also an interface to Excel which can read the configure information from Excel to realize the simulation of discharging test is designed. There are some curves I got are shown below. Several battery packs test are completed. Also, the improvement of battery test system for electric vehicle will make a great contribution in the field of mechanical automation
In order to satisfy the test demand of Electric Vehicle batteries, after the analysis of the existing battery test systems, aiming at the problems of them, an EV battery test platform with high degree of simulation is designed, based on the upper and lower computer structure. The PC software is compiled, which could control the battery to discharge with constant current or constant power, or to simulate the real road status, by the communication with the lower computer through CAN bus and 485 bus. The corresponding control method to realize the discharging test with constant current is designed, also an interface to Excel which can read the configure information from Excel to realize the simulation of discharging test is designed. Several battery packs test are completed.
Talyor formula is widely accepted to describe tool wear and is employed to optimize cutting parameters. The common test methods and processes of cutting tool wear test are firstly investigated in this paper. The effects of interference factors on different test methods are analyzed by hypothesis test to find the reason that regression generalized Taylor formula is partly invalid or not effective. The meaning of exponentials in generalized Taylor formula is discussed and tool wear test principle for difficult-to-machine materials is proposed at last.
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