陀螺电机转速稳定性对寻北影响及其稳速控制  

Effect of Stability of Rotary Speed of Gyro Motor on North Seeking and Its Speed Control

作　　者：赵美蓉[1] 张鑫鑫[1] 黄银国[1] 陈曦[1] 

机构地区：[1]精密测试技术及仪器国家重点实验室(天津大学),天津300072

出　　处：《纳米技术与精密工程》2016年第2期81-86,共6页Nanotechnology and Precision Engineering

基　　金：国家自然科学基金青年科学基金资助项目(61304246)

摘　　要：针对交流陀螺电机转速不稳,影响陀螺寻北精度的问题,选择两相无刷直流电机作为陀螺电机.通过分析陀螺运动规律和寻北算法,以中天法为例定量分析了转速稳定性对寻北精度的影响,得到电机转速稳定性优于1×10-5的控制要求;通过分析两相无刷直流电机的运动方程,建立了电机的数学模型,提出了直接占空比电压矢量调制的方法,对电机进行稳速控制,该方法结构简单、响应速度快、精度高.最后通过仿真和实验验证了该方法的可行性.Regarding the problem of unstable rotary speed of AC driving gyro motor,which exerts a negative influence on the accuracy of north seeking,the two phase brushless DC motor is chosen as the gyro motor in this paper. By analyzing the law of gyro motion and the method of north seeking,this paper gives a quantitative connection between stability of rotary speed and accuracy of north seeking based on transmit method,and obtains the control requirement that stability of rotary speed is higher than 1 ×10^- 5. With the analysis of the two phase brushless DC motor＇s motion equation,this paper establishes a mathematical model of the motor and proposes a method of direct duty cycle voltage vector modulation,which is simple,fast and accurate to control the rotary speed of the motor. At last,simulation and experimental results verify the feasibility of this method.

关 键 词：陀螺寻北 两相无刷直流电机 占空比 电压矢量调制 FPGA 

分 类 号：TM33[电气工程—电机]