mirror of https://github.com/ArduPilot/ardupilot
301 lines
11 KiB
C#
301 lines
11 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using YLScsDrawing.Drawing3d;
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namespace ArdupilotMega.HIL
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{
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public class QuadCopter : Aircraft
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{
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const float ft2m = (float)(1.0 / 3.2808399);
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const float rad2deg = (float)(180 / Math.PI);
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const float deg2rad = (float)(1.0 / rad2deg);
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const float kts2fps = (float)1.68780986;
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int framecount = 0;
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DateTime seconds = DateTime.Now;
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double[] motor_speed = null;
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double hover_throttle;
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double terminal_velocity;
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double terminal_rotation_rate;
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Vector3d old_position;
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//# scaling from total motor power to Newtons. Allows the copter
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//# to hover against gravity when each motor is at hover_throttle
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double thrust_scale;
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DateTime last_time;
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public QuadCopter()
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{
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mass = 1.0;// # Kg
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frame_height = 0.1;
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motor_speed = new double[] { 0.0, 0.0, 0.0, 0.0 };
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hover_throttle = 0.37;
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terminal_velocity = 30.0;
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terminal_rotation_rate = 4 * 360.0;
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thrust_scale = (mass * gravity) / (4.0 * hover_throttle);
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last_time = DateTime.Now;
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}
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double scale_rc(int sn, float servo, float min, float max)
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{
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float min_pwm = 1000;
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float max_pwm = 2000;
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//'''scale a PWM value''' # default to servo range of 1000 to 2000
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if (MainV2.comPort.param.Count > 0)
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{
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min_pwm = int.Parse(MainV2.comPort.param["RC3_MIN"].ToString());
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max_pwm = int.Parse(MainV2.comPort.param["RC3_MAX"].ToString());
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}
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float p = (servo - min_pwm) / (max_pwm - min_pwm);
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float v = min + p * (max - min);
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if (v < min)
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v = min;
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if (v > max)
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v = max;
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return v;
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}
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public void update(ref double[] servos, ArdupilotMega.GCSViews.Simulation.FGNetFDM fdm)
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{
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for (int i = 0; i < servos.Length; i++)
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{
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if (servos[i] <= 0.0)
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{
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motor_speed[i] = 0;
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}
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else
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{
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motor_speed[i] = scale_rc(i, (float)servos[i], 0.0f, 1.0f);
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//servos[i] = motor_speed[i];
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}
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}
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double[] m = motor_speed;
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/*
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roll = 0;
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pitch = 0;
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yaw = 0;
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roll_rate = 0;
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pitch_rate = 0;
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yaw_rate = 0;
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*/
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// Console.WriteLine("\nin m {0:0.000000} {1:0.000000} {2:0.000000} {3:0.000000}", m[0], m[1], m[2], m[3]);
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// Console.WriteLine("in vel {0:0.000000} {1:0.000000} {2:0.000000}", velocity.X, velocity.Y, velocity.Z);
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//Console.WriteLine("in r {0:0.000000} p {1:0.000000} y {2:0.000000} - r {3:0.000000} p {4:0.000000} y {5:0.000000}", roll, pitch, yaw, roll_rate, pitch_rate, yaw_rate);
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// m[0] *= 0.5;
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//# how much time has passed?
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DateTime t = DateTime.Now;
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TimeSpan delta_time = t - last_time; // 0.02
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last_time = t;
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if (delta_time.TotalMilliseconds > 100) // somethings wrong / debug
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{
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delta_time = new TimeSpan(0, 0, 0, 0, 20);
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}
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//# rotational acceleration, in degrees/s/s
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double roll_accel = (m[1] - m[0]) * 5000.0;
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double pitch_accel = (m[2] - m[3]) * 5000.0;
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double yaw_accel = -((m[2] + m[3]) - (m[0] + m[1])) * 400.0;
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//Console.WriteLine("roll {0} {1} {2}", roll_accel, roll_rate, roll);
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// rotational resistance
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roll_accel -= (roll_rate / terminal_rotation_rate) * 5000.0;
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pitch_accel -= (pitch_rate / terminal_rotation_rate) * 5000.0;
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yaw_accel -= (yaw_rate / terminal_rotation_rate) * 400.0;
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//# update rotational rates
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roll_rate += roll_accel * delta_time.TotalSeconds;
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pitch_rate += pitch_accel * delta_time.TotalSeconds;
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yaw_rate += yaw_accel * delta_time.TotalSeconds;
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// Console.WriteLine("roll {0} {1} {2}", roll_accel, roll_rate, roll);
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//# update rotation
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roll += roll_rate * delta_time.TotalSeconds;
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pitch += pitch_rate * delta_time.TotalSeconds;
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yaw += yaw_rate * delta_time.TotalSeconds;
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// Console.WriteLine("roll {0} {1} {2}", roll_accel, roll_rate, roll);
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//Console.WriteLine("r {0:0.0} p {1:0.0} y {2:0.0} - r {3:0.0} p {4:0.0} y {5:0.0} ms {6:0.000}", roll, pitch, yaw, roll_rate, pitch_rate, yaw_rate, delta_time.TotalSeconds);
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//# air resistance
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Vector3d air_resistance = -velocity * (gravity / terminal_velocity);
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//# normalise rotations
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normalise();
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double thrust = (m[0] + m[1] + m[2] + m[3]) * thrust_scale;//# Newtons
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double accel = thrust / mass;
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//Console.WriteLine("in {0:0.000000} {1:0.000000} {2:0.000000} {3:0.000000}", roll, pitch, yaw, accel);
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Vector3d accel3D = RPY_to_XYZ(roll, pitch, yaw, accel);
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//Console.WriteLine("accel3D " + accel3D.X + " " + accel3D.Y + " " + accel3D.Z);
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accel3D += new Vector3d(0, 0, -gravity);
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accel3D += air_resistance;
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Random rand = new Random();
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int fixme;
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//velocity.X += .02 + rand.NextDouble() * .03;
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//velocity.Y += .02 + rand.NextDouble() * .03;
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//# new velocity vector
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velocity += accel3D * delta_time.TotalSeconds;
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this.accel = accel3D;
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//# new position vector
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old_position = new Vector3d(position);
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position += velocity * delta_time.TotalSeconds;
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// Console.WriteLine(fdm.agl + " "+ fdm.altitude);
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//Console.WriteLine("Z {0} halt {1} < gl {2} fh {3}" ,position.Z , home_altitude , ground_level , frame_height);
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if (home_latitude == 0 || home_latitude > 90 || home_latitude < -90 || home_longitude == 0)
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{
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this.home_latitude = fdm.latitude * rad2deg;
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this.home_longitude = fdm.longitude * rad2deg;
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this.home_altitude = fdm.altitude * ft2m;
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this.ground_level = this.home_altitude;
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this.altitude = fdm.altitude * ft2m;
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this.latitude = fdm.latitude * rad2deg;
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this.longitude = fdm.longitude * rad2deg;
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}
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//# constrain height to the ground
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if (position.Z + home_altitude < ground_level + frame_height)
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{
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if (old_position.Z + home_altitude > ground_level + frame_height)
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{
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// Console.WriteLine("Hit ground at {0} m/s", (-velocity.Z));
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}
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velocity = new Vector3d(0, 0, 0);
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roll_rate = 0;
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pitch_rate = 0;
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yaw_rate = 0;
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roll = 0;
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pitch = 0;
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position = new Vector3d(position.X, position.Y,
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ground_level + frame_height - home_altitude + 0);
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// Console.WriteLine("here " + position.Z);
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}
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//# update lat/lon/altitude
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update_position();
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// send to apm
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#if MAVLINK10
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ArdupilotMega.MAVLink.__mavlink_gps_raw_int_t gps = new ArdupilotMega.MAVLink.__mavlink_gps_raw_int_t();
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#else
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ArdupilotMega.MAVLink.__mavlink_gps_raw_t gps = new ArdupilotMega.MAVLink.__mavlink_gps_raw_t();
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#endif
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ArdupilotMega.MAVLink.__mavlink_attitude_t att = new ArdupilotMega.MAVLink.__mavlink_attitude_t();
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ArdupilotMega.MAVLink.__mavlink_vfr_hud_t asp = new ArdupilotMega.MAVLink.__mavlink_vfr_hud_t();
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att.roll = (float)roll * deg2rad;
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att.pitch = (float)pitch * deg2rad;
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att.yaw = (float)yaw * deg2rad;
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att.rollspeed = (float)roll_rate * deg2rad;
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att.pitchspeed = (float)pitch_rate * deg2rad;
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att.yawspeed = (float)yaw_rate * deg2rad;
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#if MAVLINK10
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gps.alt = ((int)(altitude * 1000));
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gps.fix_type = 3;
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gps.vel = (ushort)(Math.Sqrt((velocity.X * velocity.X) + (velocity.Y * velocity.Y)) * 100);
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gps.cog = (ushort)((((Math.Atan2(velocity.Y, velocity.X) * rad2deg) + 360) % 360) * 100);
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gps.lat = (int)(latitude* 1.0e7);
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gps.lon = (int)(longitude * 1.0e7);
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gps.time_usec = ((ulong)DateTime.Now.Ticks);
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asp.airspeed = gps.vel;
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#else
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gps.alt = ((float)(altitude));
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gps.fix_type = 3;
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gps.lat = ((float)latitude);
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gps.lon = ((float)longitude);
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gps.usec = ((ulong)DateTime.Now.Ticks);
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//Random rand = new Random();
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//gps.alt += (rand.Next(100) - 50) / 100.0f;
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//gps.lat += (float)((rand.NextDouble() - 0.5) * 0.00005);
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//gps.lon += (float)((rand.NextDouble() - 0.5) * 0.00005);
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//gps.v += (float)(rand.NextDouble() - 0.5) * 1.0f;
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gps.v = ((float)Math.Sqrt((velocity.X * velocity.X) + (velocity.Y * velocity.Y)));
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gps.hdg = (float)(((Math.Atan2(velocity.Y, velocity.X) * rad2deg) + 360) % 360); ;
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asp.airspeed = gps.v;
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#endif
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MainV2.comPort.sendPacket(att);
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MAVLink.__mavlink_raw_pressure_t pres = new MAVLink.__mavlink_raw_pressure_t();
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double calc = (101325 * Math.Pow(1 - 2.25577 * Math.Pow(10, -5) * gps.alt, 5.25588));
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pres.press_diff1 = (short)(int)(calc); // 0 alt is 0 pa
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MainV2.comPort.sendPacket(pres);
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MainV2.comPort.sendPacket(asp);
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if (framecount % 12 == 0)
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{// 50 / 10 = 5 hz
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MainV2.comPort.sendPacket(gps);
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//Console.WriteLine(DateTime.Now.Millisecond + " GPS" );
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}
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framecount++;
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}
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public static Vector3d RPY_to_XYZ(double roll, double pitch, double yaw, double length)
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{
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Vector3d v = new Vector3d(0, 0, length);
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v = new_rotate_euler(-deg2rad * (pitch), 0, -deg2rad * (roll)) * v;
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v = new_rotate_euler(0, deg2rad * (yaw), 0) * v;
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return v;
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}
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static Quaternion new_rotate_euler(double heading, double attitude, double bank)
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{
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Quaternion Q = new Quaternion();
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double c1 = Math.Cos(heading / 2);
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double s1 = Math.Sin(heading / 2);
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double c2 = Math.Cos(attitude / 2);
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double s2 = Math.Sin(attitude / 2);
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double c3 = Math.Cos(bank / 2);
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double s3 = Math.Sin(bank / 2);
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Q.W = c1 * c2 * c3 - s1 * s2 * s3;
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Q.X = s1 * s2 * c3 + c1 * c2 * s3;
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Q.Y = s1 * c2 * c3 + c1 * s2 * s3;
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Q.Z = c1 * s2 * c3 - s1 * c2 * s3;
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return Q;
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}
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}
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} |