diff options
Diffstat (limited to 'src/modules/systemlib/mixer')
-rw-r--r-- | src/modules/systemlib/mixer/mixer.h | 3 | ||||
-rw-r--r-- | src/modules/systemlib/mixer/mixer_multirotor.cpp | 112 | ||||
-rwxr-xr-x | src/modules/systemlib/mixer/multi_tables | 15 |
3 files changed, 79 insertions, 51 deletions
diff --git a/src/modules/systemlib/mixer/mixer.h b/src/modules/systemlib/mixer/mixer.h index 1c889a811..225570fa4 100644 --- a/src/modules/systemlib/mixer/mixer.h +++ b/src/modules/systemlib/mixer/mixer.h @@ -447,6 +447,7 @@ public: QUAD_WIDE, /**< quad in wide configuration */ HEX_X, /**< hex in X configuration */ HEX_PLUS, /**< hex in + configuration */ + HEX_COX, OCTA_X, OCTA_PLUS, OCTA_COX, @@ -516,7 +517,7 @@ private: float _roll_scale; float _pitch_scale; float _yaw_scale; - float _deadband; + float _idle_speed; unsigned _rotor_count; const Rotor *_rotors; diff --git a/src/modules/systemlib/mixer/mixer_multirotor.cpp b/src/modules/systemlib/mixer/mixer_multirotor.cpp index bf77795d5..092c0e2b0 100644 --- a/src/modules/systemlib/mixer/mixer_multirotor.cpp +++ b/src/modules/systemlib/mixer/mixer_multirotor.cpp @@ -67,6 +67,11 @@ namespace { +float constrain(float val, float min, float max) +{ + return (val < min) ? min : ((val > max) ? max : val); +} + /* * These tables automatically generated by multi_tables - do not edit. */ @@ -110,6 +115,14 @@ const MultirotorMixer::Rotor _config_hex_plus[] = { { 0.866025, 0.500000, 1.00 }, { -0.866025, -0.500000, -1.00 }, }; +const MultirotorMixer::Rotor _config_hex_cox[] = { + { -0.866025, 0.500000, -1.00 }, + { -0.866025, 0.500000, 1.00 }, + { -0.000000, -1.000000, -1.00 }, + { -0.000000, -1.000000, 1.00 }, + { 0.866025, 0.500000, -1.00 }, + { 0.866025, 0.500000, 1.00 }, +}; const MultirotorMixer::Rotor _config_octa_x[] = { { -0.382683, 0.923880, -1.00 }, { 0.382683, -0.923880, -1.00 }, @@ -147,6 +160,7 @@ const MultirotorMixer::Rotor *_config_index[MultirotorMixer::MAX_GEOMETRY] = { &_config_quad_wide[0], &_config_hex_x[0], &_config_hex_plus[0], + &_config_hex_cox[0], &_config_octa_x[0], &_config_octa_plus[0], &_config_octa_cox[0], @@ -158,6 +172,7 @@ const unsigned _config_rotor_count[MultirotorMixer::MAX_GEOMETRY] = { 4, /* quad_wide */ 6, /* hex_x */ 6, /* hex_plus */ + 6, /* hex_cox */ 8, /* octa_x */ 8, /* octa_plus */ 8, /* octa_cox */ @@ -171,12 +186,12 @@ MultirotorMixer::MultirotorMixer(ControlCallback control_cb, float roll_scale, float pitch_scale, float yaw_scale, - float deadband) : + float idle_speed) : Mixer(control_cb, cb_handle), _roll_scale(roll_scale), _pitch_scale(pitch_scale), _yaw_scale(yaw_scale), - _deadband(-1.0f + deadband), /* shift to output range here to avoid runtime calculation */ + _idle_speed(-1.0f + idle_speed * 2.0f), /* shift to output range here to avoid runtime calculation */ _rotor_count(_config_rotor_count[geometry]), _rotors(_config_index[geometry]) { @@ -247,6 +262,9 @@ MultirotorMixer::from_text(Mixer::ControlCallback control_cb, uintptr_t cb_handl } else if (!strcmp(geomname, "6x")) { geometry = MultirotorMixer::HEX_X; + } else if (!strcmp(geomname, "6c")) { + geometry = MultirotorMixer::HEX_COX; + } else if (!strcmp(geomname, "8+")) { geometry = MultirotorMixer::OCTA_PLUS; @@ -276,67 +294,67 @@ MultirotorMixer::from_text(Mixer::ControlCallback control_cb, uintptr_t cb_handl unsigned MultirotorMixer::mix(float *outputs, unsigned space) { - float roll = get_control(0, 0) * _roll_scale; + float roll = constrain(get_control(0, 0) * _roll_scale, -1.0f, 1.0f); //lowsyslog("roll: %d, get_control0: %d, %d\n", (int)(roll), (int)(get_control(0, 0)), (int)(_roll_scale)); - float pitch = get_control(0, 1) * _pitch_scale; - float yaw = get_control(0, 2) * _yaw_scale; - float thrust = get_control(0, 3); + float pitch = constrain(get_control(0, 1) * _pitch_scale, -1.0f, 1.0f); + float yaw = constrain(get_control(0, 2) * _yaw_scale, -1.0f, 1.0f); + float thrust = constrain(get_control(0, 3), 0.0f, 1.0f); //lowsyslog("thrust: %d, get_control3: %d\n", (int)(thrust), (int)(get_control(0, 3))); - float max = 0.0f; - float fixup_scale; + float min_out = 0.0f; + float max_out = 0.0f; + float scale_yaw = 1.0f; - /* use an output factor to prevent too strong control signals at low throttle */ - float min_thrust = 0.05f; - float max_thrust = 1.0f; - float startpoint_full_control = 0.40f; - float output_factor; + /* perform initial mix pass yielding unbounded outputs, ignore yaw */ + for (unsigned i = 0; i < _rotor_count; i++) { + float out = roll * _rotors[i].roll_scale + + pitch * _rotors[i].pitch_scale + + thrust; - /* keep roll, pitch and yaw control to 0 below min thrust */ - if (thrust <= min_thrust) { - output_factor = 0.0f; - /* linearly increase the output factor from 0 to 1 between min_thrust and startpoint_full_control */ + /* limit yaw if it causes outputs clipping */ + if (out >= 0.0f && out < -yaw * _rotors[i].yaw_scale) { + yaw = -out / _rotors[i].yaw_scale; + } - } else if (thrust < startpoint_full_control && thrust > min_thrust) { - output_factor = (thrust / max_thrust) / (startpoint_full_control - min_thrust); - /* and then stay at full control */ + /* calculate min and max output values */ + if (out < min_out) { + min_out = out; + } + if (out > max_out) { + max_out = out; + } - } else { - output_factor = max_thrust; + outputs[i] = out; } - roll *= output_factor; - pitch *= output_factor; - yaw *= output_factor; - - - /* perform initial mix pass yielding un-bounded outputs */ - for (unsigned i = 0; i < _rotor_count; i++) { - float tmp = roll * _rotors[i].roll_scale + - pitch * _rotors[i].pitch_scale + - yaw * _rotors[i].yaw_scale + - thrust; + /* scale down roll/pitch controls if some outputs are negative, don't add yaw, keep total thrust */ + if (min_out < 0.0) { + float scale_in = thrust / (thrust - min_out); - if (tmp > max) - max = tmp; + /* mix again with adjusted controls */ + for (unsigned i = 0; i < _rotor_count; i++) { + outputs[i] = scale_in * (roll * _rotors[i].roll_scale + pitch * _rotors[i].pitch_scale) + thrust; + } - outputs[i] = tmp; + } else { + /* roll/pitch mixed without limiting, add yaw control */ + for (unsigned i = 0; i < _rotor_count; i++) { + outputs[i] += yaw * _rotors[i].yaw_scale; + } } - /* scale values into the -1.0 - 1.0 range */ - if (max > 1.0f) { - fixup_scale = 2.0f / max; + /* scale down all outputs if some outputs are too large, reduce total thrust */ + float scale_out; + if (max_out > 1.0f) { + scale_out = 1.0f / max_out; } else { - fixup_scale = 2.0f; + scale_out = 1.0f; } - for (unsigned i = 0; i < _rotor_count; i++) - outputs[i] = -1.0f + (outputs[i] * fixup_scale); - - /* ensure outputs are out of the deadband */ - for (unsigned i = 0; i < _rotor_count; i++) - if (outputs[i] < _deadband) - outputs[i] = _deadband; + /* scale outputs to range _idle_speed..1, and do final limiting */ + for (unsigned i = 0; i < _rotor_count; i++) { + outputs[i] = constrain(_idle_speed + (outputs[i] * (1.0f - _idle_speed) * scale_out), _idle_speed, 1.0f); + } return _rotor_count; } diff --git a/src/modules/systemlib/mixer/multi_tables b/src/modules/systemlib/mixer/multi_tables index 050bf2f47..b5698036e 100755 --- a/src/modules/systemlib/mixer/multi_tables +++ b/src/modules/systemlib/mixer/multi_tables @@ -52,6 +52,15 @@ set hex_plus { 120 CW } +set hex_cox { + 60 CW + 60 CCW + 180 CW + 180 CCW + -60 CW + -60 CCW +} + set octa_x { 22.5 CW -157.5 CW @@ -85,7 +94,7 @@ set octa_cox { -135 CW } -set tables {quad_x quad_plus quad_v quad_wide hex_x hex_plus octa_x octa_plus octa_cox} +set tables {quad_x quad_plus quad_v quad_wide hex_x hex_plus hex_cox octa_x octa_plus octa_cox} proc factors {a d} { puts [format "\t{ %9.6f, %9.6f, %5.2f }," [rcos [expr $a + 90]] [rcos $a] [expr -$d]]} @@ -104,13 +113,13 @@ foreach table $tables { puts "};" } -puts "const MultirotorMixer::Rotor *_config_index\[MultirotorMixer::Geometry::MAX_GEOMETRY\] = {" +puts "const MultirotorMixer::Rotor *_config_index\[MultirotorMixer::MAX_GEOMETRY\] = {" foreach table $tables { puts [format "\t&_config_%s\[0\]," $table] } puts "};" -puts "const unsigned _config_rotor_count\[MultirotorMixer::Geometry::MAX_GEOMETRY\] = {" +puts "const unsigned _config_rotor_count\[MultirotorMixer::MAX_GEOMETRY\] = {" foreach table $tables { upvar #0 $table angles puts [format "\t%u, /* %s */" [expr [llength $angles] / 2] $table] |