sanciyangtiao

Matlab与FEAP有限元程序的接口，可以在Matlab中调用FEAP的功能。(Matlab and the finite element program FEAP interface, you can call FEAP Matlab function.)

PI tuning for DVR control

objectC alert的重写，可改变背景颜色，可用图片设置背景等(Object C)

The modeling and attitude stabilization control problems of a four-rotor vertical takeoff and landing unmanned air vehicle (UAV) known as the quadrotor are investigated.The quadrotor’s attitude is represented by the unit quaternion rather than Euler angles to avoid singularity problem. Taking dynamical behavior of motors into consideration and ignoring aerodynamic effect, a nonlinear controller is developed to stabilize the attitude.The control design is accomplished by using backstepping control technique.The proposed control law is based on the compensation for the Coriolis and gyroscope torques. Applying Lyapunov stability analysis proves that the closed-loop attitude system is asymptotic stable. Moreover, the controller can guarantee that all the states of the system are uniformly ultimately bounded in the presence of external disturbance torque.The effectiveness of the proposed control approach is analytically authenticated and also validated via simulation study.

用matlab进行平动点轨道的绘制，halo轨道绘制，三维曲线(Libration point orbit of halo rendering, 3D curve)

数字图像处理几种算法的MATLAB实现，若有疑问请联系qq：546654010(Digital Image Processing Algorithms for MATLAB realize, If in doubt please contact qq: 546654010)

matlab code for Short-Time Fourier Transformation (STFT) with Matlab Implementation

AAR美国六级谱计算程序，用于生成高铁线路随机不平顺(Random Irregularity The AAR United States six spectral calculation procedures used to generate the high-speed rail line)

基于AR模型的现代谱估计，分别实现自相关法，协方差法，Burg法，对比分析性能，及与经典谱估计的比较(AR model based on modern spectral estimation, respectively, to achieve auto-correlation method, covariance method, Burg method, comparative analysis of performance, and comparison of classical spectral estimation)

matlab files rock....kindly see in higher versions....