in src/balancer.c [344:356]
void balance_init(void) { /* Registration code */ /* states (dwork) */ /* custom states */ ud_err_theta = 0.0F; ud_theta_ref = 0.0F; ud_thetadot_cmd_lpf = 0.0F; ud_psi = 0.0F; ud_theta_lpf = 0.0F; }