运载火箭加速度计反馈主动减载实施效果评价

针对运载火箭加速度计反馈主动减载实施效果评价，提出一种基于主动减载姿态动力学稳态分析的评价方法，在传统的“载荷侧滑角”评价指标基础上增加了“姿态偏差”、“摆角需求”和“弹道偏离”评价。稳态分析中考虑了结构干扰的偏置效应以及质心运动对风的抵消效应，重点推导了风切变对于火箭姿态动力学特征参数的影响机理。某型号案例分析结果表明，在典型“平稳风+切变风”风场作用下，主动减载技术在4项评价指标上均取得理想实施效果，并且显著缓解风切变导致的姿态参数快变现象。     

Virtual flight test of pitch and roll attitude control based on circulation control of tailless flying wing aircraft without rudders

Circulation Control(CC) realizes rudderless flight control by driving compressed air jet to generate a virtual rudder surface, which significantly improves low detectability. The layout plan of combined control rudder surface is proposed based on the tailless flying wing aircraft. The closed-loop jet actuator system and stepless rudder surface switching control strategy are used to quantitatively study the control characteristics of circulation actuator for pitch and roll attitude through 3-DOF ...     

A power and thermal management system for long endurance hypersonic vehicle

Due to the pneumatic heating and combustion effect, the scramjet engine of hypersonic vehicle faces high temperature challenge. It is necessary to comprehensively consider its thermal management and power generation together. A new Power and Thermal Management System (PTMS) combined with Supercritical Carbon Dioxide (SCO₂) closed Brayton cycle and fuel vapor turbine is proposed and discussed in this paper. The new PTMS can meet the cooling requirement of hypersonic vehicle at Mach number 6–7, and avoid the coking and scrapping in the scramjet cooling channels. Compared with the PTMS only based on fuel vapor turbine, the new PTMS utilizes the waste heat of scramjet to generate more electricity. In addition, it can reduce the use of fuel sink for cooling, and the additional weight penalty can be compensated for long endurance hypersonic flight.     

光谱01卫星脉冲等离子推力器电源处理单元的开发

针对光谱01卫星应用需求，提出了脉冲等离子推力器电源处理单元的设计方案，给出了验证结果。采用反激变换拓扑和恒功率方式实现了以2.5Hz的频率将5.76μF的储能电容器充电至1600V，将0.68μF的火花塞点火电容充电至800V；采用超快恢复高压整流管、高压绕组串联、高压整流管串联和开关频率设计解决了反激变换器整流二极管反向恢复引起的功率反向传输问题；采用输出钳位二极管和限流电阻解决了储能电容振荡负电压反向一次母线充电的问题。PPT的地面寿命试验和在轨测试结果表明，所设计的电源处理单元方案合理可行。