# 硬件仿真

• It ensures synchronous timing by avoiding the bidirectional connection to the computer. As a result the user does not need such a powerful desktop computer.

• The whole simulation remains inside the PX4 environment. Developers who are familiar with PX4 can more easily incorporate their own mathematical model into the simulator. They can, for instance, modify the aerodynamic model, or noise level of the sensors, or even add a sensor to be simulated.

The SIH can be used by new PX4 users to get familiar with PX4 and the different modes and features, and of course to learn to fly a quadrotor with the real RC controller.

The dynamic model is described in this pdf report.

Furthermore, the physical parameters representing the vehicle (such as mass, inertia, and maximum thrust force) can easily be modified from the SIH parameters.

## Requirements

To run the SIH, you will need a flight controller hardware (e.g. a Pixhawk-series board). If you are planning to use a radio control transmitter and receiver pair you should have that too. 或者，使用QGC地面站操纵杆也能被用来仿真一个无线电控制系统。

## 设置显示

The simulated quadrotor can be displayed in jMAVSim from PX4 v1.11.

1. Close QGroundControl (if opened).
2. Unplug and replug the hardware autopilot (allow a few seconds for it to boot).
3. Start jMAVSim by calling the script jmavsim_run.sh from a terminal: ./Tools/jmavsim_run.sh -q -d /dev/ttyACM0 -b 921600 -r 250 -o where the flags are
• -q to allow the communication to QGroundControl (optional).
• -d to start the serial device /dev/ttyACM0 on Linux. On macOS this would be /dev/tty.usbmodem1.
• -b to set the serial baud rate to 921600.
• -r to set the refresh rate to 250 Hz (optional).
• -o to start jMAVSim in display Only mode (i.e. the physical engine is turned off and jMAVSim only displays the trajectory given by the SIH in real-time).
4. After few seconds, QGroundControl can be opened again.

At this point, the system can be armed and flown. The vehicle can be observed moving in jMAVSim, and on the QGC Fly view.

## 鸣谢

The SIH was developed by Coriolis g Corporation, a Canadian company developing a new type of Vertical Takeoff and Landing (VTOL) Unmanned Aerial Vehicles (UAV) based on passive coupling systems.

Specialized in dynamics, control, and real-time simulation, they provide the SIH as a simple simulator for quadrotors released for free under BSD license.

Discover their current platform at www.vogi-vtol.com.