From 2f5c0cbd133deb492102ea8515563f471531acce Mon Sep 17 00:00:00 2001 From: Lorenz Meier Date: Sun, 24 Aug 2014 23:05:28 +0200 Subject: Deal with zero airspeed measurements --- src/modules/fw_att_control/fw_att_control_main.cpp | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) (limited to 'src/modules') diff --git a/src/modules/fw_att_control/fw_att_control_main.cpp b/src/modules/fw_att_control/fw_att_control_main.cpp index 0cea13cc4..ad873203e 100644 --- a/src/modules/fw_att_control/fw_att_control_main.cpp +++ b/src/modules/fw_att_control/fw_att_control_main.cpp @@ -145,6 +145,7 @@ private: perf_counter_t _nonfinite_output_perf; /**< performance counter for non finite output */ bool _setpoint_valid; /**< flag if the position control setpoint is valid */ + bool _debug; /**< if set to true, print debug output */ struct { float tconst; @@ -324,7 +325,8 @@ FixedwingAttitudeControl::FixedwingAttitudeControl() : _nonfinite_input_perf(perf_alloc(PC_COUNT, "fw att control nonfinite input")), _nonfinite_output_perf(perf_alloc(PC_COUNT, "fw att control nonfinite output")), /* states */ - _setpoint_valid(false) + _setpoint_valid(false), + _debug(false) { /* safely initialize structs */ _att = {}; @@ -700,7 +702,8 @@ FixedwingAttitudeControl::task_main() perf_count(_nonfinite_input_perf); } } else { - airspeed = _airspeed.true_airspeed_m_s; + /* prevent numerical drama by requiring 0.5 m/s minimal speed */ + airspeed = math::max(0.5f, _airspeed.true_airspeed_m_s); } /* @@ -785,7 +788,7 @@ FixedwingAttitudeControl::task_main() speed_body_v = _att.R[0][1] * _global_pos.vel_n + _att.R[1][1] * _global_pos.vel_e + _att.R[2][1] * _global_pos.vel_d; speed_body_w = _att.R[0][2] * _global_pos.vel_n + _att.R[1][2] * _global_pos.vel_e + _att.R[2][2] * _global_pos.vel_d; } else { - if (loop_counter % 10 == 0) { + if (_debug && loop_counter % 10 == 0) { warnx("Did not get a valid R\n"); } } @@ -808,7 +811,7 @@ FixedwingAttitudeControl::task_main() _roll_ctrl.reset_integrator(); perf_count(_nonfinite_output_perf); - if (loop_counter % 10 == 0) { + if (_debug && loop_counter % 10 == 0) { warnx("roll_u %.4f", (double)roll_u); } } @@ -821,7 +824,7 @@ FixedwingAttitudeControl::task_main() if (!isfinite(pitch_u)) { _pitch_ctrl.reset_integrator(); perf_count(_nonfinite_output_perf); - if (loop_counter % 10 == 0) { + if (_debug && loop_counter % 10 == 0) { warnx("pitch_u %.4f, _yaw_ctrl.get_desired_rate() %.4f," " airspeed %.4f, airspeed_scaling %.4f," " roll_sp %.4f, pitch_sp %.4f," @@ -845,7 +848,7 @@ FixedwingAttitudeControl::task_main() if (!isfinite(yaw_u)) { _yaw_ctrl.reset_integrator(); perf_count(_nonfinite_output_perf); - if (loop_counter % 10 == 0) { + if (_debug && loop_counter % 10 == 0) { warnx("yaw_u %.4f", (double)yaw_u); } } @@ -853,13 +856,13 @@ FixedwingAttitudeControl::task_main() /* throttle passed through */ _actuators.control[3] = (isfinite(throttle_sp)) ? throttle_sp : 0.0f; if (!isfinite(throttle_sp)) { - if (loop_counter % 10 == 0) { + if (_debug && loop_counter % 10 == 0) { warnx("throttle_sp %.4f", (double)throttle_sp); } } } else { perf_count(_nonfinite_input_perf); - if (loop_counter % 10 == 0) { + if (_debug && loop_counter % 10 == 0) { warnx("Non-finite setpoint roll_sp: %.4f, pitch_sp %.4f", (double)roll_sp, (double)pitch_sp); } } -- cgit v1.2.3