为了提高飞机液压系统的总装功能测试效率,利用ARINC429、离散量、模拟量等信号板卡,并基于Visual Studio 2010平台设计开发了液压能源信号模拟器。基于仿真目标机的信号模拟器验证平台,可实现对液压能源系统所需的离散量、模拟量及总...为了提高飞机液压系统的总装功能测试效率,利用ARINC429、离散量、模拟量等信号板卡,并基于Visual Studio 2010平台设计开发了液压能源信号模拟器。基于仿真目标机的信号模拟器验证平台,可实现对液压能源系统所需的离散量、模拟量及总线信号的模拟。同时搭建硬件在环测试,对液压能源信号模拟器的有效性、完整性、准确性进行验证。研究结果为飞机液压能源系统的地面功能测试提供一种先进测试方法,并提高了测试效率。展开更多
Abstract High altitude test facilities are required to test the high area ratio nozzles operating at the upper stages of rocket in the nozzle full flow conditions. It is typically achieved by creating the ambient pres...Abstract High altitude test facilities are required to test the high area ratio nozzles operating at the upper stages of rocket in the nozzle full flow conditions. It is typically achieved by creating the ambient pressure equal or less than the nozzle exit pressure. On average, air/GN2 is used as active gas for ejector system that is stored in the high pressure cylinders. The wind tunnel facilities are used for conducting aerodynamic simulation experiments at/under various flow velocities and operating conditions. However, constructing both of these facilities require more laboratory space and expensive instruments. Because of this demerit, a novel scheme is implemented for conducting wind tunnel experiments by using the existing infrastructure available in the high altitude testing （HAT） facility. This article presents the details about the methods implemented for suitably modifying the sub-scale HAT facility to conduct wind tunnel experiments. Hence, the design of nozzle for required area ratio A/A＊, realization of test section and the optimized configuration are focused in the present analysis. Specific insights into various rocket models including high thrust cryogenic engines and their holding mechanisms to conduct wind tunnel experiments in the HAT facility are analyzed. A detailed CFD analysis is done to propose this conversion without affecting the existing functional requirements of the HAT facility.展开更多
文摘为了提高飞机液压系统的总装功能测试效率,利用ARINC429、离散量、模拟量等信号板卡,并基于Visual Studio 2010平台设计开发了液压能源信号模拟器。基于仿真目标机的信号模拟器验证平台,可实现对液压能源系统所需的离散量、模拟量及总线信号的模拟。同时搭建硬件在环测试,对液压能源信号模拟器的有效性、完整性、准确性进行验证。研究结果为飞机液压能源系统的地面功能测试提供一种先进测试方法,并提高了测试效率。
文摘Abstract High altitude test facilities are required to test the high area ratio nozzles operating at the upper stages of rocket in the nozzle full flow conditions. It is typically achieved by creating the ambient pressure equal or less than the nozzle exit pressure. On average, air/GN2 is used as active gas for ejector system that is stored in the high pressure cylinders. The wind tunnel facilities are used for conducting aerodynamic simulation experiments at/under various flow velocities and operating conditions. However, constructing both of these facilities require more laboratory space and expensive instruments. Because of this demerit, a novel scheme is implemented for conducting wind tunnel experiments by using the existing infrastructure available in the high altitude testing （HAT） facility. This article presents the details about the methods implemented for suitably modifying the sub-scale HAT facility to conduct wind tunnel experiments. Hence, the design of nozzle for required area ratio A/A＊, realization of test section and the optimized configuration are focused in the present analysis. Specific insights into various rocket models including high thrust cryogenic engines and their holding mechanisms to conduct wind tunnel experiments in the HAT facility are analyzed. A detailed CFD analysis is done to propose this conversion without affecting the existing functional requirements of the HAT facility.
