#include "dialog.h"
#include "ui_dialog.h"
#include <qmath.h>

Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);
    ui->lablePic->setScaledContents(true);
    QPixmap pix(":/pic/pic.png");
    ui->lablePic->setPixmap(pix);
    ui->lablePic->resize(pix.size());
    
    setMaximumSize(size());
    setMinimumSize(size());
    
    setWindowTitle("电机死区常数τ=RC计算 by：郭树人 QQ：1085081059");
}

Dialog::~Dialog()
{
    delete ui;
}

void Dialog::on_btnRC_clicked()
{
    double V1 = ui->lnV1->text().toDouble();
    double V2 = ui->lnV2->text().toDouble();
    double V3 = ui->lnV3->text().toDouble();
    double t = ui->lnT->text().toDouble();
    double rc = ui->lnRC->text().toDouble();
    
    //初始电容电压 V1
    //死区阈值电压 V2
    //电源电压    V3
    
    //V2 = V1 + (V3 – V1) * [1 – exp( -t/RC)] 
    double temp = 0 ;
    temp = (V2 - V1)/(V3 - V1);
    temp = 1- temp ;
    rc = (-t)/qLn(temp);
    
    ui->lnRC->setText(QString::number(rc));
}