2015-12-31 21:26:32 -04:00
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/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
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/*
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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simple plane simulator class
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*/
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#pragma once
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#include "SIM_Aircraft.h"
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namespace SITL {
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/*
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a very simple plane simulator
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*/
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class Plane : public Aircraft {
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public:
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Plane(const char *home_str, const char *frame_str);
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/* update model by one time step */
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virtual void update(const struct sitl_input &input);
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/* static object creator */
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static Aircraft *create(const char *home_str, const char *frame_str) {
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return new Plane(home_str, frame_str);
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}
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protected:
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2016-01-20 01:38:35 -04:00
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const float hover_throttle = 0.7f;
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2015-12-31 21:26:32 -04:00
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const float air_density = 1.225; // kg/m^3 at sea level, ISA conditions
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float angle_of_attack;
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2016-01-02 21:30:51 -04:00
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float beta;
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2015-12-31 21:26:32 -04:00
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Vector3f velocity_bf;
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struct {
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2016-01-20 01:38:35 -04:00
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// from last_letter skywalker_2013/aerodynamics.yaml
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// thanks to Georacer!
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float s = 0.45;
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float b = 1.88;
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float c = 0.24;
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float c_lift_0 = 0.56;
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float c_lift_deltae = 0;
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float c_lift_a = 6.9;
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float c_lift_q = 0;
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float mcoeff = 50;
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float oswald = 0.9;
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float alpha_stall = 0.4712;
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float c_drag_q = 0;
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float c_drag_deltae = 0.0;
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float c_drag_p = 0.1;
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float c_y_0 = 0;
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float c_y_b = -0.98;
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float c_y_p = 0;
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float c_y_r = 0;
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float c_y_deltaa = 0;
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float c_y_deltar = -0.2;
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float c_l_0 = 0;
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float c_l_p = -1.0;
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float c_l_b = -0.12;
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float c_l_r = 0.14;
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float c_l_deltaa = 0.25;
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float c_l_deltar = -0.037;
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float c_m_0 = 0.045;
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float c_m_a = -0.7;
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float c_m_q = -20;
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float c_m_deltae = 1.0;
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float c_n_0 = 0;
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float c_n_b = 0.25;
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float c_n_p = 0.022;
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float c_n_r = -1;
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float c_n_deltaa = 0.00;
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float c_n_deltar = 0.1;
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float deltaa_max = 0.3491;
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float deltae_max = 0.3491;
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float deltar_max = 0.3491;
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// the X CoG offset should be -0.02, but that makes the plane too tail heavy
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// in manual flight. Adjusted to -0.15 gives reasonable flight
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Vector3f CGOffset{-0.15, 0, -0.05};
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2015-12-31 21:26:32 -04:00
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} coefficient;
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float thrust_scale;
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2016-01-20 01:38:35 -04:00
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float liftCoeff(float alpha) const;
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float dragCoeff(float alpha) const;
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Vector3f getForce(float inputAileron, float inputElevator, float inputRudder) const;
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Vector3f getTorque(float inputAileron, float inputElevator, float inputRudder, const Vector3f &force) const;
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2015-12-31 21:26:32 -04:00
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void calculate_forces(const struct sitl_input &input, Vector3f &rot_accel, Vector3f &body_accel);
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};
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} // namespace SITL
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