Yanda Yang

Yanda Yang

PhD student at the University of Delaware

Accurate Positioning of the End Effector of a 7-DOF Manipulator

less than 1 minute read

Published:

This project, part of the UD graduate course MEEG671: Introduction to Robotics under the supervision of Dr. Panagiotis Artemiadis, focuses on accurate end-effector positioning for a 7-DOF manipulator (LBR iiwa 7 R800, KUKA) using Aruco Marker recognition. The goal is to create a trajectory for the manipulator, equipped with a camera and a rectangular attachment, to precisely align the shape over a target based on the marker’s location and orientation. The manipulator begins at initial configuration and must avoid collisions during the motion. The project involves several key tasks:

  1. Analysis of DH parameters, transformation matrices, forward kinematics, and inverse kinematics using the inverse Jacobian.
  2. Trajectory planning to ensure smooth and collision-free motion.
  3. Simulation validation in CoppeliaSim.
  4. Final computation of the end-effector’s positioning error in MATLAB, which was determined to be around 0.003mm.

You May Also Enjoy

Two-Wheel Self-Balancing Robot

less than 1 minute read

Published:

This project, completed as part of the UD graduate course MEEG667 Mechatronics under the supervision of Dr. Adam Wickenheiser, involved designing an intelligent vehicle to meet three specific milestones. For the first two milestones, I developed a two-wheeled robot equipped with an accelerometer, enabling it to self-balance. The robot demonstrated exceptional stability across various surfaces, quickly returning to a balanced position even when pushed. To enhance control, I built a custom wireless controller to manage speed and direction. For the final milestone, a competition with specific challenges, I modified the original design by adding two additional wheels for greater stability. A lifting mechanism, powered by two microservo motors, was integrated to pick up boxes from the ground, and the robot was equipped with a variety of sensors.

Research on Joint Evolution in Quadruped Robots

less than 1 minute read

Published:

This project explores joint evolution in quadruped robots, using a joint design from the EPSRC-funded Autonomous Robot Evolution Project to construct two distinct robots within the V-REP (CoppeliaSim) simulation environment. A neuroevolutionary approach is employed to evolve the robots’ joints, with the aim of enhancing mobility and obtaining genetic traits associated with faster movement. The study involves evolving 100 generations, each consisting of 50 individuals, for a total of 5,000 individuals. The individual with the highest fitness score, determined by speed, is selected to retrieve its corresponding genome information, representing the optimal configuration under the fitness function. The two quadruped robots exhibit differing fitness values, suggesting that joint configuration impacts evolutionary outcomes. Therefore, to design the most effective robot, both the joints (controllers) and their configurations must be co-evolved. The results demonstrate that legged robots can adapt and increase mobility through evolutionary methods, making them capable of evolving based on specific performance requirements.

Railway Foreign Object Detection System Based on Deep Learning

less than 1 minute read

Published:

This project presents a high-speed railway foreign object detection system that automatically identifies foreign object in the railway environment, providing timely alerts to prevent potential accidents. By using deep learning techniques, the system significantly reduces the need for manual inspection while improving detection accuracy and efficiency. The core of the system is the application of the SSD (Single Shot MultiBox Detector) algorithm, based on convolutional neural networks (CNNs), to detect foreign objects along railway lines. The trained model demonstrates rapid and precise foreign object detection across diverse railway environments and varying weather conditions, ensuring robustness and adaptability. This system is of great significance to enhance railway safety operations.

Automated Underground Circular Parking System Model

less than 1 minute read

Published:

This project aims to design and model an innovative underground circular parking system using Fischertechnik components. The system enables fully automated car storage and retrieval, maximizing space efficiency and minimizing the time required for parking. The focus is on developing a novel parking mechanism and control system, integrating sensors and optimized motion control algorithms to ensure smooth and efficient operation.