基于FPGA的磁流变抑振器控制系统设计

Design of Magneto-rheological Vibration Suppressor Control System based on FPGA

为满足井下智能控制系统高速采集振动信号,减小测控系统电路体积,提高振动信号测量精度,同时获得多片加速度计读数,可进行高速浮点运算,具有硬件乘法器并且具有丰富的总线接口的要求,设计了基于可编程逻辑设计工具FPGA的模糊PID控制器的磁流变抑振系统。为确保实现智能控制系统的合理管控,采用了LIS2DH三轴加速度计模块,并针对LIS2DH三轴加速度计与PID控制系统设计了相应的控制模块。结果表明:基于FPGA的磁流变抑振器控制系统能够充分利用FPGA芯片的特性,同时利用模糊自适应PID算法优势,实现磁流变抑振器对井下管柱的实时抑振功能。另一方面,在Quartus II中编写被控模型以便仿真验证,在Modelsim中进行各模块的波形仿真,验证了该系统设计的正确性。

In order to meet the requirements of high-speed collection of vibration signals of under the shaft intelligent control system,reduce the circuit volume of measurement and control system,improve the measurement accuracy of vibration signals,obtain multiple accelerometer readings,carry out high-speed floating-point operation,and have hardware multiplier and rich bus interface,it was designed that the magneto-rheological vibration suppression system of fuzzy PID controller based on programmable logic design tool FPGA.In order to ensure the reasonable control of the intelligent control system,the LIS2DH triaxial accelerometer module was adopted,and the corresponding control module was designed for the LIS2DH triaxial accelerometer and PID control system.The results showed that the control system of magneto-rheological vibration suppressor based on FPGA could make full use of the characteristics of FPGA chip and use advantages of fuzzy adaptive PID algorithm to realize the real-time vibration suppression function of magneto-rheological vibration suppressor for under the shaft string.On the other hand,the controlled model was built in Quartus II for simulation verification.The waveform simulation of each module in Modelsim was finished that verified the correctness of the system design.