This paper describes the modal analysis test made for the director of a rocket launcher and the modal parameters identified with the mobility circle fitting method useful data are provided for the study of the dynamic properties of the director.
The slew moment generated by the lock force and the strike by the firing air current to the director is the main cause of the initial disturbance to 122mm rocket gun. It will reduce the initial disturbance by the symmetrical launch method in some degree.
Methods:Under anesthesia, the Sprague-Dawley rats were fixed on the stereotactic instrument, with two stimulus electrodes inserted into the subcutaneous layer of the root of the second、third whiskers in the third row,and given single square stimulation with wavelength 0.1ms. TEPs were recorded on the contralateral epidural surface. The recording time was 120ms, wave filter 1000Hz ~3000Hz, gain 10,000 times, and summation 5~10times.
Also, using Squid cache server as the access control infrastructure, on the base of understanding its working theory and disadvantage this research implements the efficient redirect plugin of its own depends on the standard of Squid plugin interface to improve the URL matching efficiency on the condition of high capacity and load.