Abstract： A new conception of CNT (carbon nanometer tube) baffle is presented by increasing the absorptivity of the absorption coat to decrease the baffle outline size and mass, and to enhance the stray light rejection ability. A series of technologies to outgrow CNT coat with absorptivity of 99% more on the Ti alloy base are developed and applied on the new CNT baffle being capable of displacing the current product technology. The space environment applicability of the CNT baffle is demonstrated by a series of ground space environment simulation tests such as atomic oxidation, ultraviolet radiation, highenergy particles radiation, vibrancy mechanics, thermal vacuum, and so on. Comparing the star tracker image values caused by the stray light with the current normal star tracker baffle, the value with the CNT baffle is reduced by 56%, which indicates the advantages of the CNT baffle in stray light rejection. The innovation success shown in this paper breaks through the bottleneck technologies about the practical application of carbon nanometer tube technology in the stray light rejection technical domain, and has important engineering value for the star tracker technology progress.

Abstract：Dynamic of solar sail and method of trajectory design have been analyzed. Then the control forces calculated by the control strategy are added into the STK orbit propagator, which is realized through the STK plugin coded by MATLAB. The simulation results show that the methods proposed can realize expeditiously and efficiently that STK/MATLAB coordinated work to neatly support control simulation of special force model such as solar sail dynamic, and the abundant capabilities of STK are suitable for designing and analysising the complex space mission.

Abstract：In order to improve the flexible vibration resulting from solar array, the PMSM(permanent magnet synchronous motor) is chosen to be the drive sources. A method of friction parameter identification and friction compensation is brought forward based on the LuGre model. Both static and dynamic parameters of the model are identified via the particle swarm optimization (PSO) algorithm. A friction torque measuring platform is designed, combined with which the proposed identification method is used to the test identification. From the comparison of simulation and test, the accuracy of the identification method is verified. The method is used to compensate the friction of SADA system， and the test results show that the method can improve the system’s tracking performance and decease the influences of friction.

Abstract：To reduce the difficulties in trajectory optimization and improve the adaptability of desensitization guidance, a novel online desensitized trajectory design method is proposed for Mars entry. The weighted value of predicted terminal sail error and state sensitivity are adopted as performance indexes, which are actually convex functions of bank angle. Taking use of this property, the original optimization problem is converted into a simple dynamic optimizing process. Then, according to the mission requirement and estimated entry state, a threedegreeoffreedom desensitized trajectory that simultaneously satisfies the requirement for range and cross range can be found via iteration process. Numerical simulations show that the terminal state accuracy of the proposed method is close to the existing desensitization design.

Abstract： The vector pairs method is adopted for dynamic modeling of a freefloating twolinks flexible space manipulator system in this paper. On the basis of each body’s dynamic function, the constraint equations between each two connected objects are derived. These equations are assembled by Lagrange multiplier method and constitute the dynamic equations of the whole system. By using this method, the modeling process requires less information and the functions are easy to deduce. The final dynamic equations are very standardized and more appropriate to design control system. The validity of the dynamic equations derived by the method has been demonstrated by numerical simulations.

Abstract： The microamplitude and multifrequency vibrations can make the system unable to meet the requirements for the attitude precision and stability, which are produced by the highspeed rotor operation in flywheels installed on the spacecraft. Based on the structure of flywheel isolation system, a natural property of the isolator is validated. For the flywheel isolation system with a flexible bracket, a mathematical model is established. The effects on the characteristics of flywheel microvibration are studied, The research results show that the isolator presents a superior property on vibration isolation. The decrease of stiffness of the flexible bracket can help flywheel isolation system suppress the vibrations. The stiffness of flexible bracket can reduce the second order of the system natural vibration frequency, but almost has no effects on the whirl characteristics.

Abstract： Polynomial fitting method is usually used to compensate the error of sun sensors, and the calibration precision is relatively low. According to the modeling analysis of the influence of various error sources, a new calibration method is proposed, and an error compensation method is provided to compensate the geometric error. The experimental results show that the calibration accuracy is over 3 times higher than the ordinary one.

Abstract：To improve the precision in calculation and state prediction of realtime data near the endpoints of measurement sequence, the cubicpolynomial firstorderderivativetheorem (CPFODT) is put forward and proved, and a new algorithm based on CPFODT is researched for calculating the first order derivative of realtime data. How the sampling length, measure error bounds and sampling interval affect the results is shown by simulation calculation. The errors are analyzed, and some basic principles of parameter selection are given. Verification of the algorithm is made by measurement, and the results indicate that it is very robust and reliable. Not only can this algorithm improve the precision in calculation and state prediction of realtime data near the endpoints of measurement sequence, but also some interpolation algorithms can derive from it. So, it can provide high accurate data.

Abstract：To improve the reliability， accuracy and stray light suppression ability，laser diode is commonly used for illumination of space vision measurement subsystem which is used in rendezvous and docking and onorbit operation mission. A design of laser diode driving circuit is proposed, the delayed start ability, constantcurrent driving and overcurrent protection are realized. Experimental results validate the high stability reliability and high accuracy of proposed designing.

Abstract：The characteristic of the stray light is analyzed. An improved baffle with four angled vanes is given. The configuration of the baffle is simple and its weight is light. The TracePro software is used to analyze the lightshielding ability. The PST curve is analyzed. The stray light distribution on the detector when the sun is at 30 degree is given to illuminate the straylight uniformity. The results of straylight experiment are given and the curves of the average intensity on the detector’s three regions are analyzed. The simulated result and the experimental result show that the lightshielding ability of the improved baffle is good and can meet the lightshielding requirement of the star sensor.

Abstract：The polyhedral model is now only applied in code regions with affine expressions in arrays’ indexes. A method is presented that extending polyhedral model to nonaffine expression. With the information acknowledged in runtime, nonaffine expressions can be transformed to affine expressions, which are led by parameters that do not change in the loop nest. Then a specialized version of the original loop is generated, which makes polyhedral techniques applicable. This method enables the polyhedral model to be applicable in more code regions. More SCoPs in the code regions are recognized and higher speedup is achieved, therefore the performance of the program is improved. The validity and efficiency of the presented method are demonstrated by a series of experiments.