最优捷联中制导规律的研究

对中远程战术导弹的捷联复合制导的中制导系统进行了分析和研究。建立了目标－导弹相对运动和弹体及自动驾驶仪的数学模型。基于这一模型，应用最优控制理论，设计了考虑弹体及自动驾驶仪的惯性为三阶控制对象捍的最优制指令。     

某改型导弹折叠舵的设计

详细介绍了××改型导弹折叠舵研究课题的成果。内容包括：主要设计要求、研制程序、方案的拟定、设计、试验及结果分析、结论等部分。通过试制及试验，证明把高强度扭力杆应用于折叠舵的展开机构具有展开能量大、展开时间短、重量轻、体积小、结构简单等优点。该项技术不但使××改型导弹折叠舵课题获得成功，而且可以推广应用到需要折叠与展开的其他飞行器上     

动态推力频域恢复技术

介绍了固体火箭发动机静止试验动态推力的测量方法。首先对试验台架和发动机进行动态校准得到系统的响应函数，然后利用频率响应函数对试验过程中测到的输出力函数进行恢复，以获得真实的输入力函数。实践证明，频域恢复技术是有效的途径之一。     

局部模型跟踪控制理论的应用研究

将文献［１］中的局部模型跟踪变结构理论用于导弹控制系统设计，探索了一条设计控制系统的新路。某型号导弹控制系统设计中采用了本文提出的参数选择法，获得了良好的仿真结果。     

固体发动机药柱粘结试件的三维应力分析

推进剂／衬层／绝热层矩形粘结试件已作为随发动机测试试件，用于监控药柱最薄弱的推进剂／衬层界面粘结质量。由于试件较厚，又材料具有粘弹特性，因此应对它进行三维粘弹性有限元分析。本文分析了推进剂／衬层界面附近的应力分布情况，并给出试件启裂点有效应力与拉伸平均应力之比的集中系数，供药柱结构完整性分析人员使用     

固体火箭发动机排气二次燃烧的抑制技术

介绍了无烟固体火箭推进剂研究的最新进展——固体火箭发动机排气二次燃烧的抑制技术,内容包括二次燃烧的产生机理、抑制机理和国外技术现状等.国外经验表明,采用少量的抑制剂可以达到对高能无烟推进剂发动机排气二次火焰的抑制.     

Production of neutrons from interactions of GCR-like particles

In order to help assess the risk to astronauts due to the long-term exposure to the natural radiation environment in space, an understanding of how the primary radiation field is changed when passing through shielding and tissue materials must be obtained. One important aspect of the change in the primary radiation field after passing through shielding materials is the production of secondary particles from the breakup of the primary. Neutrons are an important component of the secondary particle field due to their relatively high biological weighting factors, and due to their relative abundance, especially behind thick shielding scenarios. Because of the complexity of the problem, the estimation of the risk from exposure to the secondary neutron field must be handled using calculational techniques. However, those calculations will need an extensive set of neutron cross section and thicktarget neutron yield data in order to make an accurate assessment of the risk. In this paper we briefly survey the existing neutron-production data sets that are applicable to the space radiation transport problem, and we point out how neutron production from protons is different than neutron production from heavy ions. We also make comparisons of one the heavy-ion data sets with Boltzmann-Uehling-Uhlenbeck (BUU) calculations.     

航天飞行器防热部件烧蚀行为的数值模拟

对航天飞行器防热部件在氧－煤油发动机火焰喷吹下的烧蚀行为进行了有限元数值模拟。利用“杀死”单元的方法建立防热部件瞬态温度场的有限元模型，实现了烧蚀边界的退缩，从而完成了对烧蚀尺寸变化的定量描述。烧蚀开始于4．59s，到12s时线烧蚀量为1．47mm。计算结果与试验的实测结果一致。     

近期商用单级入轨飞行器的可行性

讨论了单级入轨火箭推进飞行器,尤其是使用航天飞机外置贮箱和六个航天飞机主发动机的一次性使用飞行器的可靠性和发射费用。减小发动机质量将是方案改进的主要方面。如果低成本、小质量的主发动机研制成功,那么一次性使用 SSTO(单级入轨)飞行器将拥有商用发射前景,而且有利于可重复使用 SSTO 飞行器的研制。     

LISA — a study of the ESA cornerstone mission for observing gravitational waves

The primary objective of the Laser Interferometer Space Antenna (LISA) mission is to detect and observe gravitational waves from massive black holes and galactic binaries in the frequency range 10⁻⁴ to 10⁻¹ Hz. This low-frequency range is inaccessible to ground-based interferometers because of the unshieldable background of local gravitational noise and because ground-based interferometers are limited in length to a few km. LISA is an ESA cornerstone mission and recently had a system study (Ref. 1) carried out by a consortium led by Astrium, which confirmed the basic configuration for the payload with only minor changes, and provided detailed concepts for the spacecraft and mission design. The study confirmed the need for a drag-free technology demonstration mission to develop the inertial sensors for LISA, before embarking on the build of the flight sensors. With a technology demonstration flight in 2005, it would be possible to carry out LISA as a joint ESA-NASA mission with a launch by 2010 subject to the funding programmatics. The baseline for LISA is three disc-like spacecraft each of which consist of a science module which carries the laser interferometer payload (two in each science module) and a propulsion module containing an ion drive and the hydrazine thrusters of the AOCS. The propulsion module is used for the transfer from earth escape trajectory provided by the Delta II launch to the operational orbit. Once there the propulsion module is jettisoned to reduce disturbances on the payload. Detailed analysis of thermal and gravitational disturbances, a model of the drag-free control and of the interferometer operation confirm that the strain sensitivity of the interferometer will be achieved.