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Acceleration limits: Limit at correct location

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This commit is contained in:
Lorenz Meier 2015-12-07 13:36:36 +01:00
parent 4f69834761
commit 7b06c4afb9
1 changed files with 16 additions and 17 deletions
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33
src/modules/mc_pos_control/mc_pos_control_main.cpp
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@ -1201,23 +1201,6 @@ MulticopterPositionControl::task_main()
control_auto(dt);
}
// limit total horizontal acceleration
math::Vector<2> acc_hor;
acc_hor(0) = (_vel_sp(0) - _vel_sp_prev(0)) / dt;
acc_hor(1) = (_vel_sp(1) - _vel_sp_prev(1)) / dt;
if (acc_hor.length() > _params.acc_hor_max) {
acc_hor.normalize();
acc_hor *= _params.acc_hor_max;
math::Vector<2> vel_sp_hor_prev(_vel_sp_prev(0), _vel_sp_prev(1));
math::Vector<2> vel_sp_hor = acc_hor * dt + vel_sp_hor_prev;
_vel_sp(0) = vel_sp_hor(0);
_vel_sp(1) = vel_sp_hor(1);
}
_vel_sp_prev = _vel_sp;
if (!_control_mode.flag_control_manual_enabled && _pos_sp_triplet.current.valid
&& _pos_sp_triplet.current.type == position_setpoint_s::SETPOINT_TYPE_IDLE) {
/* idle state, don't run controller and set zero thrust */
@ -1291,6 +1274,22 @@ MulticopterPositionControl::task_main()
_vel_sp(2) = _params.land_speed;
}
// limit total horizontal acceleration
math::Vector<2> acc_hor;
acc_hor(0) = (_vel_sp(0) - _vel_sp_prev(0)) / dt;
acc_hor(1) = (_vel_sp(1) - _vel_sp_prev(1)) / dt;
if (acc_hor.length() > _params.acc_hor_max) {
acc_hor.normalize();
acc_hor *= _params.acc_hor_max;
math::Vector<2> vel_sp_hor_prev(_vel_sp_prev(0), _vel_sp_prev(1));
math::Vector<2> vel_sp_hor = acc_hor * dt + vel_sp_hor_prev;
_vel_sp(0) = vel_sp_hor(0);
_vel_sp(1) = vel_sp_hor(1);
}
_vel_sp_prev = _vel_sp;
_global_vel_sp.vx = _vel_sp(0);
_global_vel_sp.vy = _vel_sp(1);
_global_vel_sp.vz = _vel_sp(2);