基于烟花算法的压阻式压力传感器动态补偿方法

Dynamic Compensation of Piezoresistive Pressure Sensors Based on Fireworks Algorithm

为了解决在冲击波测试过程中,压力传感器有限的工作带宽和较低的谐振频率导致测试信号发生畸变问题,提出采用烟花算法对传感器进行动态补偿方法,并针对动态补偿改进适应度函数,进一步提高补偿结果的动态性能。通过激波管测试数据得到传感器动态补偿传递函数,可将阶跃压力信号的上升时间补偿至15.0μs,超调量降低到8.27%;对实际炮口冲击波测试数据进行动态补偿,结果显示,动态补偿可有效抑制压力传感器谐振频率的影响,提高超压峰值和正压作用时间的测试精度。

In the process of shock wave testing,the test signal is distorted by the limited bandwidth and low resonant frequency of pressure sensor.In order to solve this problem,a pressure sensor dynamic compensation method which is based on fireworks algorithm is presented.And the fitness function for the dynamic compensation is improved to increase the dynamic performance.The transfer function of dynamic compensation of pressure sensor is obtained from the test data of shock tube.The rise time of step pressure signal can be improved to 15.0 μs,and the overshoot is reduced to 8.27% after dynamic compensation by the proposed method.In the actual muzzle shock wave test,the dynamic compensation method can suppress the resonant frequency effectively,and make the pressure sensor test system achieve a better dynamic performance.