Modeling and Simulation of a Capacitive Micro-Accelerometer System
Capacitive Micro-Accelerometer digital feedback system was developed using the theory of second-order ∑-△ modulator.The second-order mechanical gauge outfit behaves as two integrators in second-order ∑-△ modulator and the number of bits of the quantizer is 1 bit.Continuous-time model of the gauge outfit was transformed to discrete-time model based on the IIR theory and the quantizer linear model was established using the LMS arithmetic.Therefore the quasi-linear discrete model was derived.The simulation results shown that the micro-accelerometer system was a low pass system and it had linear phase characteristic approximately in the low frequency band.The simulation results also displayed that the second order noise shaping was performed in the system which made the noise transfer to higher frequency band.Finally the accelerometer system was simulated with the sine signal input,and the results validated that the output and the input are consistent.
Micro-Accelerometer Digital Feedback ∑-△ Modulation Noise Shaping
GUO Wen
Xian Aeronautical University,Xian,710077,China
国际会议
The 33th Chinese Control Conference第33届中国控制会议
南京
英文
6163-6167
2014-07-28（万方平台首次上网日期，不代表论文的发表时间）