Acoustics and electric circuit coupling
Posted Jan 12, 2022, 12:53 a.m. EST Electrical, Acoustics & Vibrations, Parameters, Variables, & Functions 6 Replies
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I have a model that combine pinna simulator in pressure acoustic physics with 3D geometry and microphone in analog circuit(not a simple RCL circuit but a complex circuit).
Then I want to couple them by adding a acoustic impedance on the boundary which represente microphone, the acoustic impedance is defined as voltage of circuit source devided by current of circuit. On the circuit side, I put the pressure as the source of the circuit. The study is in frequency domain.
However, when I press compute, I always got the error :
Division by zero. - Function: / Failed to evaluate variable. - Variable: comp1.acpr.Zi - Defined as: (((comp1.cir.v_1unit_Pa_cf)unit_s_cf)unit_A_cf)/((unit_m_cfunit_V_cf)comp1.cir.L4_i) Failed to evaluate expression. - Expression: dvol_spatial((((-comp1.acpr.delta)comp1.acpr.iomega)comp1.acpr.p_t)(1/comp1.acpr.Zi)) Failed to evaluate Jacobian of expression. - Expression: (-comp1.acpr.deltacomp1.acpr.iomegacomp1.acpr.p_ttest(comp1.p)/comp1.acpr.Zi)*(dvol_spatial)
which may mean that impedance is zero.
I want to know how to fix the model to couple analog circuit and pressure acoustics.