For observation training of firing weapons, military operates Joint Fire Training Simulator system. During the acceptance test for deployment of weapon system, it occurred that could increase training fatigue in mock observation device. This study describes in cause analysis and improvement activities to solve it. Due to the characteristics of observing training with a small image panel through the ocular, image noise and skipping are factors that cause fatigue to training. It was analyzed that the noise of image was caused by HDMI (High-Definition Multimedia Interface) splitter and design change was promoted. In addition, it was determined that the image skip occurred due to the software filter for stabilizing the image of mock observation device. It was solved by improving the calculation error of accumulating data. Securing the quality of observation images is expected to reduce training fatigue and contribute to improving the training environment.

Various optical devices are utilized to fire artillery in Korean Army. To transport and store the optical devices, some cases are made up for a set. The covers of cases are made of Glass Fiber Reinforced Plastic(GFRP) and resin. Because of materials of case, it has a disadvantage in productivity for manufacturing covers and assembling components. In this study, ABS resin is presented for alternative and verify possibility through FEM analysis. Comparing with GFRP, max stress-ratio of ABS is decreased 19.6% for bottom, 8.2% for side and 25.4% for edge. Also each strain is changed 17.3%, 180.3% and 17.7%. According to the research results, ABS resin is considered possible for alternative. And the number of components is decreased for around 73.8%.

This study is carried out on the structural improvement of military mobile kitchen trailer for the betterment of fighting power by serving meals to solider in right time. To recognize the real problems of field kitchen trailer, the heat transfers from burner for soup cooker were compared with each other. By the test, the necessity of improvement was deduced. To examine the cause of cooking time, it was determined by the characteristic diagram. Based on the cause, there are two types of kitchen trailer's burner structures. To verify the improved structures, it was carried out for the performance test. As the results, the time did not become longer and the temperature rising rate per minute increased. This study is expected to be devoted to the future improvement of military mobile kitchen trailer.