PX4 Software-In-The-Loop(SITL) Simulation on Gazebo

Jaeyoung Lim Introduction PX4 is a great platform to implement a UAV system based on a opensource autopilot. One of the great features of PX4 is that you can run a SITL simulation(Software in the loop simulation) to simulate your flight on simulation. This is useful as you can check new mission or control algorithms…

External Position Control of a Quadrotor Using USB2PPM

Jaeyoung Lim Overview A USB2PPM interface was developed which enables a PC to interact directly with the RC transmitter trainer port. External Position Control was successfully demonstrated to show that the computer can successfully control real-time applications using the USB2PPM controller. This can be used for sending simple data in long distances (~2km) in a…

PX4 Offboard Control Using MAVROS on ROS

This post is written by Jaeyoung Lim Overview Recently opensource autopilots have become reliable by various failsafe functions integrated by the opensource community. Developing different softwares for each application can be time consuming and hard to verify the reliablility of the software. An alternative to modifying the autopilot software, is to use an onboard computer…

Non-Symmetric Non-Planar Quadrotor

This project started out as an experiment. The idea was that standard flight controllers should be able to control non-planar shaped quadrotors as long as the control board is mounted near the center of gravity. I decided to try the idea out. The project addresses the symmteric / non-symmetric forms of non-planar motor layouts. Basic…

USB2PPM Interface

Jaeyoung Lim Blog post related to the slide can be accessed here Summary USB2PPM Interface by Jaeyoung Lim Contents – Overview – Need Finding – Problem in current works – Wiring – Software – Firmware – PC Interface – Projects 3. Overview – USB2PPM is a device that can translate serial or voltage command values…

Constant Yaw Rate Quadrotor

A new flight mode was implemented on to the modified Arducopter firmware that is capable of maintaining constant yaw rate while the quadrotor is able to be controlled by the pilot in respect to the inertial frame. Such a flight mode can be used in localization applications (SLAM) or imaging. Sensors that have a narrow…

Teleoperated Car : Zipcar

Post written by Jaeyoung Lim Project by Jaeyoung Lim, Keunwoo Park, Dongho Kang Overview The Zipcar was an experimental project towards a more instinct interface from the conventional RC stick based interface for FPV driving experience. A racing wheel for gaming was used to control a remote control car providing onboard first-person-view(FPV) Video and data…

First-Person-View Quadrotor for Teleoperation

Recent attention to FPV racing and FPV experience shows that visual feedback from a teleoperated platform can give a very immersive experience. A FPV quadrotor platform was built to try the FPV experience and the results was satisfying. Visual Feedback is done using a video telemetry on 5.8GHz band. APM 2.7 ruuning Arducopter was used…