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To using the Gatling fire mode to the fire accuracy, the Gatling gun fire mode was researched and it was found that the advantage of even Gatling gun. The firing mode of the Gatling weapon is clearly a turn round, several tubes firing several rounds. There are drawbacks that the faster the launch, the more the gun body tubes group shift in the dire...
Context in source publication
Context 1
... shown in Figure 6, the 4 pipes are divided into two groups, and one group moves from the left, the top is in the launch state; and the other group enters from the right side, and the bottom is in the launch state. In this case, the two F forces are placed in equilibrium for the body tube group, the o point is transformed into a force of 2F, as shown in Figure 7. ...
Citations
... The barrel and machine support of the Gatling, reference paper [16] M134 imitation barrels and body frame. Since the barrel rotates at high speed, the solution of vibration characteristics of a Gatling gun is very complicated, as shown in Figure 2. In this paper, the critical speed model of high-speed rotating system is established, and the critical speed is determined through finite element modal analysis to determine the rigid/flexible state of barrel components in different speed regions; based on trajectory theory and unbalanced rotor theory, the barrel vibration model considering projectile weight and acceleration is established, and the muzzle is determined through the prestressed modal analysis of cantilever supported rotor under unbalanced force and moving mass Firing accuracy of vibrating counter rotating tube machine gun. ...
... The barrel and machine support of the Gatling, reference paper [16] M134 imitation barrels and body frame. Since the barrel rotates at high speed, the solution of vibration characteristics of a Gatling gun is very complicated, as shown in Figure 2. When the front and rear diameters D1 and D2 of the Gatling weapon are not equal, the α is equal to, 12 DD − When the front and rear diameters D1 and D2 of the Gatling weapon are not equal, the α is equal to, ...
In order to reduce the x-direction and Y-direction displacement disturbance of the barrel and improve the firing accuracy, based on Bernoulli Euler’s theoretical assumption of beam and taking M134 barrel machine gun as the calculation model, the pre-stress modal analysis and optimization of cantilever supported rotor under unbalanced force and moving mass are carried out in this paper. The main work of this paper is as follows: (1) M134 physical model is established, and the unbalanced force in the motion process of projectile in bore is solved by interior ballistic theory; (2) Based on the unbalanced rotor theory, the barrel vibration model considering the projectile weight and acceleration is established; (3) The critical speed model of high-speed rotating system is established, and the critical speed is determined by finite element modal analysis to determine the rigid/flexible state of barrel components in different speed regions; (4) Based on the above model, take the x-direction and Y-direction displacement of the barrel as the output value, and take the elastic modulus of the barrel, the relative position between the barrel hoop and the fuselage components and the cross-sectional area as the variable values, carry out the optimization design, and verify the firing accuracy before and after optimization through experiments.
The accuracy level is important in shooting activities and depends on many factors, such as hand tremors as body vibration and shooting position. Achieving high accuracy in different shooters is challenging, especially in the case of different shooting positions. However, there is a lack of information about the influence of shooting positions and experiences on a shooter’s body vibration and accuracy levels. Thus, this study aims to develop a portable and low-cost hand tremor measurement device (as a function of body vibration) to identify the influence of hand movement on shooting accuracy. For this purpose, low-cost accelerometer sensors and a microcontroller were used as the measurement kit. Three different shooting positions (squatting, standing, and prone) were analyzed. The shooters were classified into novice and expert groups. Each group had five participants with standard fire guns and accelerometer kits. These participants were asked to shoot the target to get their best accuracy. Besides, the hand tremor level data from the self-developed kit were recorded to investigate the hand tremors. The results show that the novice participants have more hand tremors in all shooting positions. There are significant differences between the squatting, standing, and prone positions in hand tremors for novice and expert participants. In the expert group, the prone and squatting positions have the least vibration level, indicated by the least acceleration (0.01 - 0.04 m/s2 for the expert group and 0.02 - 0.11 m/s2 for the novice group). The best accuracy for all positions is also obtained from expert shooters. It can be concluded that different shooting positions are related to the body vibrations. The expert shooters have a lower body vibration than the novice participants. The hand tremor levels may influence the accuracy level since different shooting positions and experiences have different vibration and accuracy levels
