![]() ![]() Therefore, how to effectively monitor the response of a painting to shock and vibration excitation during transport is of great significance. Combined with the dynamics characteristics of the painting, art conservators can also improve the packaging systems to prevent the eigenmodes of the painting from being excited, and avoid irreversible damage. By monitoring the motion of the painting during transport, they try to define safety limits of shock and vibration for the painting, predict the damage of the painting, or evaluate the vibration isolation performance of the packaging system. With the increase in loan of artworks between museums, art conservators are increasingly concerned about the behaviour of paintings in their care in response to shock and vibration during transport. Therefore, the designed vibration reproduction system provides a reference for the unknown canvas response during transport, and further helps art conservators to evaluate the transport process of the painting. A long-term reproduction experiment verifies its stable reproducibility. Even though some overshoot in the reproduced acceleration can be observed in some cases, the overall reproduction is very good. The experimental results show that the vibration reproduction system has sufficient reproduction accuracy for the vibration response. The vibration of the canvas is then measured by a laser Doppler vibrometer without contact. A real-time simulation platform based on the multi-channel Filtered- x Least Mean Square (FxLMS) algorithm controls four actuators simultaneously and reproduces the vibration of the strainer obtained from a real transport experiment. There, the resulting vibration of the canvas can be conveniently observed in a controlled environment with respect to an inertial reference. For this reason, based on vibration data measured on the strainer that is easily obtained during transport, this contribution proposes to reproduce these with high accuracy in the laboratory. However, limited to the narrow structure of the transport crate, the lack of an inertial reference, and the limitations to attach sensors to the canvas, this is a difficult task. Canvas: Self-Restore an Archived Courseįor a complete description, including schedules, timelines, and a description of what is archived and what is not archived, please refer to the full Canvas Archive Policy.Monitoring the vibration of the painting canvas during transport is of great significance to protect paintings from damage.You may also use this tool to restore archived courses. Please refer to the Penn State Knowledge Base articles for more information and specific instructions on how to use the Course Archive Manager tool. ![]() If you do not wish to have a particular course archived, you may temporarily delay this process with the new Course Archive Manager tool. When a course is archived, it will no longer appear on your Canvas Dashboard or in your All Courses List. Initial archiving of selected courses will take place on Wednesday, September 25, 2019. LionPATH courses taught during fall 2016 or later ( LionPATH term 2168) are not being archived at this time. T his initial stage of archiving will involve LionPATH and ISIS courses taught during or previous to summer 2016 ( LionPATH term 2165).Īll LionPATH and ISIS courses taught during or previous to summer 2016 have been selected for archiving by default. Please refer to Canvas: Request a Master Course (KB0011048) for instructions.ĭue to the number of older courses in Canvas, the archiving process will be introduced in stages. NOTE: The suggested method for retaining course material for future use is to keep such material in a Master Course rather than depending on the archiving process. In order to improve the management of courses and the functionality of Canvas, Penn State has developed a process to archive c ompleted c ourses. ![]()
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