针对稳定云台具有的频繁正反转、零速保持、负载扰动大的特点,研究了一种适合小型无刷云台的电机驱动,重点研究了磁场定向控制技术在该应用中的使用.采用了非接触式磁编码传感器检测电机转子位置和速度,与姿态传感器解算的角度一起构建角度闭环控制系统,并在电流环中使用单电阻电流采样技术来减少电路的元器件数目.利用MATLAB仿真软件验证了角度、速度、电流闭环控制的可行性.

针对单相单链接STATCOM中产生的谐波问题,讨论了奇次谐波重复控制.此控制方法能快速跟踪误差,有效的抑制电路中产生的奇次谐波,且占用的存储器空间仅有传统重复控制器的一半,运用简单.讨论了奇次谐波重复控制的工作原理,使用滑窗迭代法分析了控制器的稳定性,仿真验证了奇次谐波重复控制器跟踪误差和抑制谐波的有效性.

In view of the poor real-time and unsatisfactory telecontrol problems of current home security equipments, proposed a new wireless remote security control algorithm which embedded GPRS network in STM32 high performance micro processor. The algorithm with the help of efficient smoke sensing acquisition technology and wireless communica-tion network, achieved the effective monitoring in real-time data flow and through the smoke sensor data, realized the real-time control of household appliances. The physical model operating results verify the feasibility and effectiveness of the proposed scheme.

In order to study the mechanical dithering number of electric switch contact, especial for measuring the mechanical dithering number of electric contact, a measurement system of the mechanical dithering number was de-signed based on MCU.This paper discussed the hardware design and software design of the measurement system, and provided circuit diagram and flow chart of program, as well as the key source code.For nudging button, com-pound button and SPDT switch, the mechanical dithering number was measured.The measurement results show that: the number of mechanical dither is random digit, it is 0 to 11; for compound button, front edge dithering number is usually less than back edge dithering number;for SPDT switch, front edge dithering number is obviously greater than back edge dithering number.When pressing the button switch, we need to operate it quickly and deci-sively and force it appropriately, which helps to reduce the mechanical dithering number.

This paper firstly described the mathematical model of the doubly-fed machine in the dq coordi- nate system, and derived the mathematical model in MT coordinate system, with combinations of using, control strategies such as the stator flux oriented control, AC-DC converter in the rotor side, the hystere- sis control in Current loop and so on, and then drew the diagram of vector control of doubly-fed machine, and finally built a double-fed motor speed control system simulation model in the environment of MAT- LAB Simulink for simulation_

The battery is an important energy storage device in the EPS.The battery of EPS may produce excessive voltage when charging,and insufficient voltage when discharging.Long term excessive voltage or insufficient voltage will influence the normal operation of the EPS.The purpose of detecting the operational behavior of the battery in time is to maintain,overhaul or change the battery.Therefore, the design of EPS battery group detection module with MSP430F149 micro control unit as its core is worked out,which can examine the operation status ocular by making use of DSP as its master machine and LCD1602 as its display.