Analog computation of the attitude parameters of rotary steering drilling tool

Based on Taylor mean-value theorem,a novel analog computation method for the attitude parameters of rotary steering drilling tool is proposed.The numerical expression of trigonometric function and its approximate expression are discussed in detail,a kind of analog electric circuit for sinusoidal function is designed using analog multiplier/divider,and the direct analog circuits for the computation of the attitude parameters with negative feedback are also presented.The comparative analysis of the numeric simulation results with experimental results shows that these analog computation circuits are feasible.The analog computation method can reduce the requirement for the data acquisition speed of computer and can improve the dynamic control performance of the system.