source: flair-src/trunk/lib/FlairSimulator/src/X8.cpp@ 12

// %flair:license{
// This file is part of the Flair framework distributed under the
// CECILL-C License, Version 1.0.
// %flair:license}
//  created:    2014/04/03
//  filename:   X8.cpp
//
//  author:     Majd Saied, Guillaume Sanahuja
//              Copyright Heudiasyc UMR UTC/CNRS 7253
//
//  version:    $Id: $
//
//  purpose:    classe definissant un X8
//
/*********************************************************************/

#include "X8.h"
#include "Simulator.h"
#include <SimuBldc.h>
#include <TabWidget.h>
#include <Tab.h>
#include <DoubleSpinBox.h>
#include <GroupBox.h>
#include <math.h>
#ifdef GL
#include <ISceneManager.h>
#include "Blade.h"
#include "MeshSceneNode.h"
#include "Gui.h"
#include <Mutex.h>
#endif

#define K_MOT 0.4f //blade animation
#define G (float)9.81 //gravity ( N/(m/s²) )

#ifdef GL
using namespace irr::video;
using namespace irr::scene;
using namespace irr::core;
#endif
using namespace flair::core;
using namespace flair::gui;
using namespace flair::actuator;

namespace flair
{
namespace simulator
{

X8::X8(const Simulator* parent,std::string name, int dev_id): Model(parent,name)
{
    Tab *setup_tab=new Tab(GetTabWidget(),"model");
        m=new DoubleSpinBox(setup_tab->NewRow(),"mass (kg):",0,20,0.1);
        arm_length=new DoubleSpinBox(setup_tab->LastRowLastCol(),"arm length (m):",0,2,0.1);
        l_cg=new DoubleSpinBox(setup_tab->LastRowLastCol(),"position G (m):",-0.5,0.5,0.02);//position du centre de gravité/centre de poussé
        k_mot=new DoubleSpinBox(setup_tab->NewRow(),"k_mot:",0,1,0.001,3);// vitesse rotation² (unité arbitraire) -> force (N)
        c_mot=new DoubleSpinBox(setup_tab->LastRowLastCol(),"c_mot:",0,1,0.001,3);// vitesse rotation moteur -> couple (N.m/unité arbitraire)
        f_air_vert=new DoubleSpinBox(setup_tab->NewRow(),"f_air_vert:",0,10,1);//frottements air depl. vertical, aussi utilisé pour les rotations ( N/(m/s) ) (du aux helices en rotation)
        f_air_lat=new DoubleSpinBox(setup_tab->LastRowLastCol(),"f_air_lat:",0,10,1);//frottements air deplacements lateraux ( N/(m/s) )
        j_roll=new DoubleSpinBox(setup_tab->NewRow(),"j_roll:",0,1,0.001,5); //moment d'inertie d'un axe (N.m.s²/rad)
        j_pitch=new DoubleSpinBox(setup_tab->LastRowLastCol(),"j_pitch:",0,1,0.001,5); //moment d'inertie d'un axe (N.m.s²/rad)
        j_yaw=new DoubleSpinBox(setup_tab->LastRowLastCol(),"j_yaw:",0,1,0.001,5); //moment d'inertie d'un axe (N.m.s²/rad)
        j_r=new DoubleSpinBox(setup_tab->NewRow(),"j_r:",0,1,0.001);// moment des helices (N.m.s²/rad)
        sigma=new DoubleSpinBox(setup_tab->LastRowLastCol(),"sigma:",0,1,0.1); // coefficient de perte d efficacite aerodynamique (sans unite)
        S=new DoubleSpinBox(setup_tab->LastRowLastCol(),"S:",1,2,0.1); // coefficient de forme des helices 1<S=1+Ss/Sprop<2 (sans unite)

    motors=new SimuBldc(this,name,8,dev_id);
}

void X8::Draw(){
#ifdef GL

        //create unite (1m=100cm) UAV; scale will be adapted according to arm_length parameter
    //note that the frame used is irrlicht one:
    //left handed, North East Up

    const IGeometryCreator *geo;
    geo=getGui()->getSceneManager()->getGeometryCreator();

    //cylinders are aligned with y axis
    red_arm=geo->createCylinderMesh(2.5,100,16,SColor(0, 255, 0, 0));
    black_arm=geo->createCylinderMesh(2.5,100,16,SColor(0, 128, 128, 128));
    motor=geo->createCylinderMesh(7.5,15,16);//,SColor(0, 128, 128, 128));
    //geo->drop();

    ITexture* texture=getGui()->getTexture("carbone.jpg");
    fl_arm=new MeshSceneNode(this, red_arm, vector3df(0,0,0),vector3df(0,0,-135));
    fr_arm=new MeshSceneNode(this, red_arm, vector3df(0,0,0),vector3df(0,0,-45));
    rl_arm=new MeshSceneNode(this, black_arm, vector3df(0,0,0),vector3df(0,0,135),texture);
    rr_arm=new MeshSceneNode(this, black_arm, vector3df(0,0,0),vector3df(0,0,45),texture);

    texture=getGui()->getTexture("metal047.jpg");
    tfl_motor=new MeshSceneNode(this, motor, vector3df(70.71,-70.71,2.5),vector3df(90,0,0),texture);
    tfr_motor=new MeshSceneNode(this, motor ,vector3df(70.71,70.71,2.5),vector3df(90,0,0),texture);
    trl_motor=new MeshSceneNode(this, motor ,vector3df(-70.71,-70.71,2.5),vector3df(90,0,0),texture);
    trr_motor=new MeshSceneNode(this, motor ,vector3df(-70.71,70.71,2.5),vector3df(90,0,0),texture);

    bfl_motor=new MeshSceneNode(this, motor, vector3df(70.71,-70.71,-17.5),vector3df(90,0,0),texture);
    bfr_motor=new MeshSceneNode(this, motor ,vector3df(70.71,70.71,-17.5),vector3df(90,0,0),texture);
    brl_motor=new MeshSceneNode(this, motor ,vector3df(-70.71,-70.71,-17.5),vector3df(90,0,0),texture);
    brr_motor=new MeshSceneNode(this, motor ,vector3df(-70.71,70.71,-17.5),vector3df(90,0,0),texture);

    tfl_blade=new Blade(this, vector3df(70.71,-70.71,17.5));
    tfr_blade=new Blade(this, vector3df(70.71,70.71,17.5),true);
    trl_blade=new Blade(this, vector3df(-70.71,-70.71,17.5),true);
    trr_blade=new Blade(this, vector3df(-70.71,70.71,17.5));

    bfl_blade=new Blade(this, vector3df(70.71,-70.71,-17.5));
    bfr_blade=new Blade(this, vector3df(70.71,70.71,-17.5),true);
    brl_blade=new Blade(this, vector3df(-70.71,-70.71,-17.5),true);
    brr_blade=new Blade(this, vector3df(-70.71,70.71,-17.5));

    motor_speed_mutex=new Mutex(this);
    for(int i=0;i<8;i++) motor_speed[i]=0;
    ExtraDraw();
    #endif
}

X8::~X8()
{
    //les objets irrlicht seront automatiquement detruits (moteurs, helices, pales) par parenté
}

#ifdef GL
void X8::AnimateModel(void)
{
    motor_speed_mutex->GetMutex();
    tfl_blade->SetRotationSpeed(K_MOT*motor_speed[0]);
    tfr_blade->SetRotationSpeed(-K_MOT*motor_speed[1]);
    trl_blade->SetRotationSpeed(-K_MOT*motor_speed[2]);
    trr_blade->SetRotationSpeed(K_MOT*motor_speed[3]);

    bfl_blade->SetRotationSpeed(-K_MOT*motor_speed[4]);
    bfr_blade->SetRotationSpeed(K_MOT*motor_speed[5]);
    brl_blade->SetRotationSpeed(K_MOT*motor_speed[6]);
    brr_blade->SetRotationSpeed(-K_MOT*motor_speed[7]);
    motor_speed_mutex->ReleaseMutex();

    //adapt UAV size
    if(arm_length->ValueChanged()==true)
    {
        setScale(arm_length->Value());
    }
}

size_t X8::dbtSize(void) const
{
    return 6*sizeof(float)+4*sizeof(float);//6ddl+4helices
}

void X8::WritedbtBuf(char* dbtbuf)
{/*
    float *buf=(float*)dbtbuf;
    vector3df vect=getPosition();
    memcpy(buf,&vect.X,sizeof(float));
    buf++;
    memcpy(buf,&vect.Y,sizeof(float));
    buf++;
    memcpy(buf,&vect.Z,sizeof(float));
    buf++;
    vect=getRotation();
    memcpy(buf,&vect.X,sizeof(float));
    buf++;
    memcpy(buf,&vect.Y,sizeof(float));
    buf++;
    memcpy(buf,&vect.Z,sizeof(float));
    buf++;
    memcpy(buf,&motors,sizeof(rtsimu_motors));*/
}

void X8::ReaddbtBuf(char* dbtbuf)
{/*
    float *buf=(float*)dbtbuf;
    vector3df vect;
    memcpy(&vect.X,buf,sizeof(float));
    buf++;
    memcpy(&vect.Y,buf,sizeof(float));
    buf++;
    memcpy(&vect.Z,buf,sizeof(float));
    buf++;
    setPosition(vect);
    memcpy(&vect.X,buf,sizeof(float));
    buf++;
    memcpy(&vect.Y,buf,sizeof(float));
    buf++;
    memcpy(&vect.Z,buf,sizeof(float));
    buf++;
    ((ISceneNode*)(this))->setRotation(vect);
    memcpy(&motors,buf,sizeof(rtsimu_motors));
    AnimateModele();*/
}
#endif //GL

//states are computed on fixed frame NED
//x north
//y east
//z down
void X8::CalcModel(void)
{
    float tfl_speed,tfr_speed,trl_speed,trr_speed;
    float bfl_speed,bfr_speed,brl_speed,brr_speed;
    float u_roll,u_pitch,u_yaw,u_thrust;
    float omega;
#ifdef GL
    motor_speed_mutex->GetMutex();
#endif //GL
    motors->GetSpeeds(motor_speed);
#ifdef GL
    motor_speed_mutex->ReleaseMutex();
#endif //GL
        tfl_speed=motor_speed[0];
        tfr_speed=motor_speed[1];
        trl_speed=motor_speed[2];
        trr_speed=motor_speed[3];
        bfl_speed=motor_speed[4];
        bfr_speed=motor_speed[5];
        brl_speed=motor_speed[6];
        brr_speed=motor_speed[7];

        omega=tfl_speed+brl_speed+trr_speed+bfr_speed-bfl_speed-trl_speed-brr_speed-tfr_speed;


    /*
        ** ===================================================================
        **    u roll: roll torque
        **
        ** ===================================================================
        */

    u_roll=arm_length->Value()*k_mot->Value()*(sigma->Value()*tfl_speed*tfl_speed+bfl_speed*bfl_speed
                                                +sigma->Value()*trl_speed*trl_speed+brl_speed*brl_speed
                                                -sigma->Value()*tfr_speed*tfr_speed-bfr_speed*bfr_speed
                                                -sigma->Value()*trr_speed*trr_speed-brr_speed*brr_speed)*sqrtf(2)/2;

    /// Classical Nonlinear model of a quadrotor ( This is the w_x angular speed of the quadri in the body frame). It is a discrete integrator
        //state[0].W.x=(dT()/j_roll->Value())*((j_yaw->Value()-j_pitch->Value())*state[-1].W.y*state[-1].W.z-j_r->Value()*state[-1].W.y*omega + u_roll) +state[-1].W.x;//Osamah
    state[0].W.x=(dT()/j_roll->Value())*((j_pitch->Value()-j_yaw->Value())*state[-1].W.y*state[-1].W.z-j_r->Value()*state[-1].W.y*omega + u_roll) +state[-1].W.x;//Majd

        //state[0].W.x=(dT()/j_roll->Value())*(u_roll-m->Value()*G*l_cg->Value()*sinf(state[-2].W.x)-f_air_vert->Value()*arm_length->Value()*arm_length->Value()*state[-1].W.x)+state[-1].W.x;

        /*
        ** ===================================================================
        **   u pitch : pitch torque
        **
        ** ===================================================================
        */
        u_pitch=arm_length->Value()*k_mot->Value()*(sigma->Value()*tfl_speed*tfl_speed+bfl_speed*bfl_speed
                                             +sigma->Value()*tfr_speed*tfr_speed+bfr_speed*bfr_speed
                                            -sigma->Value()*trl_speed*trl_speed-brl_speed*brl_speed
                                             -sigma->Value()*trr_speed*trr_speed-brr_speed*brr_speed)*sqrtf(2)/2;

    /// Classical Nonlinear model of a quadrotor ( This is the w_y angular speed of the quadri in the body frame). It is a discrete integrator
        //state[0].W.y=(dT()/j_pitch->Value())*((j_roll->Value()-j_yaw->Value())*state[-1].W.x*state[-1].W.z-j_r->Value()*state[-1].W.x*omega + u_pitch)+state[-1].W.y;//Osamah
    state[0].W.y=(dT()/j_pitch->Value())*((j_yaw->Value()-j_roll->Value())*state[-1].W.x*state[-1].W.z-j_r->Value()*state[-1].W.x*omega + u_pitch)+state[-1].W.y;//Majd

   //state[0].W.y=(dT()/j_pitch->Value())*(u_pitch-m->Value()*G*l_cg->Value()*sinf(state[-2].W.y)-f_air_vert->Value()*arm_length->Value()*arm_length->Value()*state[-1].W.y)+state[-1].W.y;

        /*
        ** ===================================================================
        **    u yaw : yaw torque
        **
        ** ===================================================================
        */
        u_yaw=c_mot->Value()*(tfl_speed*tfl_speed-bfl_speed*bfl_speed
                        +trr_speed*trr_speed-brr_speed*brr_speed
                        -tfr_speed*tfr_speed+bfr_speed*bfr_speed
                        -trl_speed*trl_speed+brl_speed*brl_speed);

    /// Classical Nonlinear model of a quadrotor ( This is the w_z angular speed of the quadri in the body frame). It is a discrete integrator
        //state[0].W.z=(dT()/j_yaw->Value())* u_yaw +state[-1].W.z;//Osamah
        state[0].W.z=(dT()/j_yaw->Value())*((j_roll->Value()-j_pitch->Value())*state[-1].W.x*state[-1].W.y+u_yaw )+state[-1].W.z;//Majd

        //state[0].W.z=(dT()/j_yaw->Value())*(u_yaw-f_air_lat->Value()*state[-1].W.z)+state[-1].W.z;

    // compute quaternion from W
    // Quaternion derivative: dQ = 0.5*(Q*Qw)
    Quaternion dQ=state[-1].Quat.GetDerivative(state[0].W);

    // Quaternion integration
    state[0].Quat =state[-1].Quat +dQ*dT();
    state[0].Quat.Normalize();

    // Calculation of the thrust from the reference speed of motors
    u_thrust=k_mot->Value()*S->Value()*
       (sigma->Value()*tfl_speed*tfl_speed+sigma->Value()*tfr_speed*tfr_speed+sigma->Value()*trl_speed*trl_speed+sigma->Value()*trr_speed*trr_speed
       +bfl_speed*bfl_speed+bfr_speed*bfr_speed+brl_speed*brl_speed+brr_speed*brr_speed);
    Vector3D vect(0,0,-u_thrust);
    vect.Rotate(state[0].Quat);

    /*
        ** ===================================================================
        **     x double integrator
        **
        ** ===================================================================
        */
        state[0].Pos.x=(dT()*dT()/m->Value())*(vect.x-f_air_lat->Value()*(state[-1].Pos.x-state[-2].Pos.x)/dT())+2*state[-1].Pos.x-state[-2].Pos.x;
    state[0].Vel.x=(state[0].Pos.x-state[-1].Pos.x)/dT();

    /*
        ** ===================================================================
        **     y double integrator
        **
        ** ===================================================================
        */
        state[0].Pos.y=(dT()*dT()/m->Value())*(vect.y-f_air_lat->Value()*(state[-1].Pos.y-state[-2].Pos.y)/dT())+2*state[-1].Pos.y-state[-2].Pos.y;
    state[0].Vel.y=(state[0].Pos.y-state[-1].Pos.y)/dT();

        /*
        ** ===================================================================
        **     z double integrator
        **
        ** ===================================================================
        */
        state[0].Pos.z=(dT()*dT()/m->Value())*(vect.z+f_air_vert->Value()*(state[-1].Pos.z-state[-2].Pos.z)/dT()+m->Value()*G)+2*state[-1].Pos.z-state[-2].Pos.z;
    state[0].Vel.z=(state[0].Pos.z-state[-1].Pos.z)/dT();

#ifndef GL
    if(state[0].Pos.z<0) state[0].Pos.z=0;
#endif

}

} // end namespace simulator
} // end namespace flair