新一代运载火箭自主控制技术（英文）

This paper introduces the autonomous control technologies for a new generation launch vehicle for guidance and attitude control. Based on the iterative guidance mode(IGM) of Long March launch vehicles, the autonomous compensation IGM(ACIGM) for the terminal attitude deviation during the coasting phase is proposed. Considering the characteristics of large static instability and weak bearing capacity, the attitude control technology based on active disturbance rejection control(ADRC) and a control method based on an accelerometer are proposed. Targeting at non-fatal failures that may occur during flights, autonomous guidance reconstruction technology, nozzle fault diagnosis and reconstruction technology in the coasting phase are studied. Some of the autonomous control technologies proposed in this paper have achieved good control results as seen through flight verification.     

新一代低温液体中型运载火箭（英文）

The maiden flight of LM-8 performed perfectly on December 22, 2020. The design concept of modularization, seriation and combination has been perfectly exhibited in LM-8. The four main technical innovations, including rapid integrated design based on modularization, engine thrust regulation, modal parameters acquisition technology based on numerical simulation, and flight load control, were verified during the maiden flight. LM-8 is now positioned to be the main force in China's medium launch vehicles for commercial launch. In the future, the mission adaptability of LM-8 will be improved to provide efficient and low-cost launch services. In addition, new technologies to allow repeated use and autonomous flight will be validated.     

新一代运载火箭发射燃气动力学数值模拟（英文）

By using the mesh resolution control method based on the nozzle scale, a paralleled super numerical simulation and high-quality mesh model of the launch jet dynamics for new-generation launch vehicles was developed.Based upon this, a transient numerical simulation method, combining the pressure and velocity, tightly coupled algorithm and SST turbulence model, was used to complete the unsteady numerical simulation of the launch jet dynamics of the new-generation launch vehicles. The numerical sim...     

伺服机构故障下运载火箭控制分配方法研究（英文）

This paper investigates the servo mechanism reconfiguration and fault tolerance control issue for a launch vehicle. Firstly, the servo reconfiguration algorithm is considered as an optimization model, and commonly used optimization algorithms are analyzed and compared. An improved method based on Singular Value Decomposition(SVD) for solving the suboptimal solution of the direct assignment problem is proposed, being suitable for engineering application, while maintaining the advantages of existi...     

运载火箭连接强度有限元分析研究（英文）

The strength of the connection structure has always been a key issue in the structural design of a launch vehicle. In this paper, the finite element analysis method is used for the strength of typical connection structures of a new launch vehicle. The research scope includes the inter-stage connection structure and the bundle connection structure. Aiming at establishing the strength of these two connection structures under flight conditions, we built a refined finite element model, simulated the bolt tensile test and obtained a calculation criteria, and carried out finite element analysis of the connection structures under flight conditions. As a result, we not only established the analysis and evaluation method of the connection structures based on the refined finite element modeling analysis, but also provided a fast numerical simulation design method for the development of the launch vehicle's connection structures, which greatly improved the design efficiency and reduced the design risk.     

我国新一代运载火箭长七A成功发射试验九号卫星（英文）

正China's new-generation medium high-orbit liquid launch vehicle LM-7 A was launched into space with the Shiyan 9 satellite, launching the satellite into orbit with success. The successful launch of LM-7 A commenced the space launch missions of the year 2021 from Hain     

捷龙三号运载火箭系统（英文）

The Smart Dragon 3 launch vehicle is a commercial carrier rocket based on the experience with the existing solid-fuel rocket Long March 11 to meet the growing market demand in China for launching commercial satellites to low and medium orbits. The carrier rocket has the characteristics of integral rocket storage, usable for both sea-and land-based launches, rapid response and cost-effectiveness. It is a solid carrier rocket with the largest lift capacity and the largest fairing envelope successf...     

长征五号B运载火箭首飞（英文）

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大型运载火箭重量特性快速测量技术研究（英文）

In order to further adapt to the task requirements for rapid testing and high-density launches, the LM-5series of rocket boosters have adopted an automated acquisition and measurement process for key parameters such as the weight and centroid of the launch vehicle. A fully automatic rapid measurement technology for the weight characteristics of the rocket, consisting of a measurement system, a control system, an execution system, and a data processing system, has been developed and incorporated....     

基于在线轨迹优化的运载火箭可重构制导方法（英文）

In order to improve the safety and reliability of a launch vehicle, we present a reconfigurable guidance method based on online trajectory optimization for thrust decrease at the ascending stage of the launch vehicle in this paper. We used a multiple shooting method to convert the optimal control problem into a nonlinear programming(NLP) problem. Finally, we used the interior point method to solve the NLP problem. The simulation results show that the method can effectively adapt to thrust decreases by 5% and 10%. This reconfigurable guidance method based on online planning is proposed to realize launch missions under the condition of power descent, thus verifying the feasibility of the method.     

“龙”系列运载火箭正式发布（英文）

<正>China Academy of Launch Vehicle Technology(CALT)underChinaAerospace Science and Technology Corporation (CASC) held a news conference on October19,2019,officiallyannouncing the Jielong (Smart Dragon) series of solid propel ant commercial launch vehicles have been put into operation, and introducing the development and launch plan of the     

新一代运载火箭增压技术研究

随着新一代运载火箭研制的开展,新型120t级高压补燃液氧煤油发动机将得到广泛的使用,该发动机采用的推进剂贮箱增压系统设计被列为新一代运载火箭研制的重大关键技术之一。在对国内外主要液体运载火箭增压方案进行分析的基础上对120t级液氧煤油发动机的贮箱增压系统进行了研究,提出了液氧贮箱采用压力传感器与电磁阀组合的常温氦气加温增压,煤油贮箱采用压力传感器与电磁阀组合的常温氦气增压方案,并针对液氧贮箱采用常温氦气加温增压的方案开展了理论分析和全尺寸系统级试验研究。理论分析和试验结果表明,该增压方案可行。     

中国首次运载火箭海上发射技术试验圆满成功（英文）

正A LM-11 carrier rocket named the CZ-11 WEY was launched at 12:06 Beijing time on June 5, 2019 from a mobile launch platform in the Yellow Sea, successfully sending two technology experimental satellites Bufeng-1 A and Bufeng-1 B and five commercial satellites into their preset orbits. This is China's first     

大型固体运载火箭发动机技术发展现状及展望（英文）

In this study, taking China’s Smart Dragon 3 solid launch vehicle, which made its first successful offshore launch on December 9, 2022, as an example, we focus on the technical characteristics and key technologies of various solid motors used for the launch vehicle. The current technological development status is introduced, and the key technologies needed for large solid motors are summarized. For comparison, we also list and analyze the technical characteristics of world-class P80 and P120C so...     

运载火箭自主动态轨迹优化控制的进展（英文）

This paper first introduces the technical requirements for autonomous flight, with a brief review of the International Academy of Astronautics(IAA) study group, “autonomous dynamic trajectory optimization control of launch vehicle”. Two research scenarios, ascent rescue and powered descent, are compared from the viewpoint of optimal control. On this basis, the technologies on the autonomous trajectory planning and control under the thrust-drop failures in the ascending phase, and the autonomous guidance method during the powered landing for the recovery of the rockets are discussed respectively. For the ascending problem, the characteristics of different solutions, including the iterative guidance method(IGM)-based residual carrying capacity evaluation, the state-triggered indices(STI), the joint planning with the payload's performance, and the multiple graded optimization(MGO), are analyzed for comparison. For the landing problem, the challenges such as the feasible region reduction caused by high thrust weight ratio(HTWR) and the disturbance adaptability brought by the limited feasible region, are studied in detail, as well as the onboard planning demonstration flight in China are introduced. Finally, the foundations supporting the above methods are summarized, which play an important role in promoting the flight autonomy.     

长征四号乙运载火箭成功发射高分七号卫星（英文）

<正>A LM-4B launch vehicle lifted off from the Taiyuan Satellite Launch Center at 11:22 Beijing time on November 3,2019,successfully launching the GF-7satellite,part of a major project of the China High-definition Earth Observation System (CHEOS) into its preset orbit.Three other satellites launched with GF-7 together were developed by the Shanghai Institute of Satellite Enginee ring,     

长征四号乙运载火箭成功实施一箭三星发射（英文）

<正>At II:26 Beijing time on September12,2019,liftoff of a LM-4B launch vehicle took place at the Taiyuan Satellite Launch Center,deploying into orbit 3satellites,including a 5-meter optical satellite ZY-1 02D satellite,an Ice-Pathfinder(also known as BNU-I) of Beijing Normal University and a Taurus I nanosat of Shanghai ASES Spaceflight Technology Co.Ltd.into sutn-sytnchrOonous orbits.The main passenger of this mission,     

基于数据驱动的运载火箭电气系统云测试平台设计及应用（英文）

In order to improve efficiency of the integrated test of a launch vehicle electrical system while meeting the requirement of high-density, a cloud test platform for the electrical system was designed based on a data-driven approach, using secure private cloud technology and virtualization technology. The platform has a general hardware and software architecture, which integrates the functions of graphical editing, automated testing, data processing, fault diagnosis and so on. It can realize mult...     

新一代运载火箭闭式增压控制技术研究

提出一种闭式增压控制方案,三模冗余增压控制装置录取推进剂贮箱冗余设置的数字压力传感器信号,基于闭式增压控制方程,采用3取2表决输出控制指令对多路电磁阀实施开闭控制,使贮箱压力控制在理想范围;然后介绍了闭式程序增压和备保固定时序增压的控制算法。工程应用和试验结果表明,闭式增压控制技术方案可行,增压控制方法合理。本文方案产品通用性好,增压控制可靠性高,系统适应性强,具有良好的推广应用价值。     

大功率高电压电动伺服系统在运载火箭上的应用研究（英文）

The 30 kW high-power electric servo system used in the solid booster of the Long March 6 A(LM-6 A) launch vehicle is introduced, and the function, composition of the system as well as its constituent equipments are detailed. To solve the problem of out-of-tolerance in the system dynamic characteristics, an advanced correction network algorithm architecture and double notch filter were designed. Experimental verification was conducted to prove that the dynamic characteristics requirement under mu...