文中分析了 目前车载低轨卫星数据接收系统对天线过顶跟踪和机动性能的需求,详细比较了遥感天线过顶跟踪技术的适用范围和优缺点,并介绍了四种典型类型车载过顶跟踪遥感天线基本原理和代表产品,归纳总结了各个类型产品的特点和应用范围以及主要产品技术指标对比;针对未来低轨卫星数据接收天线在高机动性能和Ka频段宽带高速数传数据接收等方面提出的新需求,研究了车载低轨卫星数据接收与跟踪天线的多频段馈源设计、高指向跟踪、高精度面板设计制造和一键"展开/收藏"控制等技术和解决途径,最后展望了车载低轨卫星数据接收与跟踪天线的发展趋势.

航天测控系统中目前普遍采用双通道跟踪体制的多功能跟踪基带进行快速校相,但在遥感卫星接收系统中单通道跟踪接收机应用普遍,动态快速校相技术应用尚未得到广泛应用,本文根据单通道单脉冲跟踪接收机的校相基本原理,提出了单通道单脉冲跟踪接收机快速校相方法,并对传统的快速校相方法进行了改进,有效提高了快速校相精度和遥感接收设备自动化标校水平.

在极轨卫星遥感地面站设备中,过顶无盲区跟踪是必须具备的功能。为了跟踪接收的时间尽可能地长,满足过顶跟踪能力的特殊要求,采用了基于X-Y座架的过顶跟踪控制技术。文章中分析了X-Y型座架的特点,解决了A-E座架高仰角跟踪盲区,同时分析了X-Y型座架跟踪不同轨道高度卫星出现的低仰角跟踪盲区。介绍了基于X-Y座架的极轨卫星遥感地面站中过顶跟踪关键技术的实现;分析了X-Y座架过顶跟踪伺服控制系统的坐标转换原理和外场标校技术。最后给出了系统实际跟踪极轨卫星的跟踪试验结果。通过工程实践验证,采用X-Y座架的过顶跟踪伺服控制系统,可实现一定高度卫星的工作区域内的无盲区过顶跟踪。

The paper analyzes the factors that cause blindness zone during zenith pass tracking and the solutions,then presents a design of remote sensing tracking servo control system including system operation principle,composition and design,the antenna control unit,antenna drive unit,angle coding unit and security protection unit.This paper discusses the control technique and coordinate transform formula based on remote sensing tracking servo control system.The result of calculation is consistent with the result of experiment.

Aiming at the problems of antenna control system occurring in applications,the paper analyzes the system composition of antenna control system.It presents a design of antenna control system,and describes antenna control unit,antenna drive unit,angle coding unit,security protect unit.The algorithm of P-Fuzzy-PI approach is brought forward.At last,the computer simulation is implemented,and the result indicates that P-Fuzzy-PI decreases overshoot and improves the dynamic performance of system,and the controller is validated.

In this paper,the technology of restrained pump voltage is presented.The basic principles for pump voltage and protective circuit are referred.The actual circuit parameters are calculated in detail in reference to practical direct current PWM Antenna servo control system.And the influence for DC PWM servo system which caused by "Pump Voltage" from the power supply is eliminated properly.The practical applications proved that this design is also reasonable and successful.

The design for one kind of weather radar antenna servo control system was presented.And some solutions for the servo bandwidth are provided here: Notch filer technique,Serial lag compensatory network,Acceleration Negative Feedback and Compound Control were adopted in loop circuit design to restrain the machinery resonance of servo control system and then improve the servo system bandwidth.The Bang-Bang control was applied here to improve the dynamic performance.This kind of design solved the problems for system speediness and stability.In practical applications,this design was also proved to be reasonable and successful.

介绍一种针对正、余弦旋转变压器-数字转换器(RDC)模块,用复杂可编程逻辑器件(CPLD)技术实现伺服轴角编码电路设计的方案.分析了轴角编码器系统中14XSZ系列旋转变压器-数字转换器的原理、轴角粗精组合原理及轴角纠错原理.详细介绍了CPLD的内部功能电路、CPLD轴角粗精组合和纠错实现电路,以及CPLD的工作时序图.提出了利用CPLD实现轴角粗精组合处理的方案,并通过了实际系统运行的考验,证明该方案可行.