0
votes
0answers
6 views

Avoid singularities or predict singularities?

I am at the moment trying to implement inverse kinematics for large displacements, by using interpolating. The problems is though that when i peform inverse kinematics for the interpolated data I ...
1
vote
0answers
17 views

Mobile robot algorithm implementation error

I am working in reproducing a robotics paper, first simulating it in MATLAB in order to implement it to a real robot afterwards. The robot's model is: $$\dot{x}=V(t)cos\theta $$ ...
0
votes
0answers
39 views

Looking for a steering method for autonomous robot [on hold]

I am working on an autonomous robot for an event. My robot is to reach speeds of 6-7 m/s, over different terrain (concrete, grass etc). I am looking for a steering mechanism which might be best suited ...
1
vote
1answer
28 views

Step size in numerical differentiation

I get position information and a corresponding timestamp from a motion tracking system (for a rigid body) at 120 Hz. The position is in sub-millimeter precision, but I'm not too sure about the time ...
0
votes
1answer
18 views

Dead Reckoning: Obtaining Position Estimation from Accelerometer Acceleration Integration

Good day, I have been reading papers about position integration from accelerometer readings. I have consulted this paper from freescale on how that is achievable and this article regarding leaky ...
1
vote
1answer
21 views

Are all Flight Controllers and Remote Controls using the same protocol?

I'm about to start a project, where I'm sniffing data between remote controls and flight controllers on RC copters and doing stuff with that information. Do all (or most) flight controllers use the ...
0
votes
1answer
16 views

E: Unable to locate package ros-jade-desktop-full

I want to install ROS on my Xubuntu 16.04, Xenial Xerus. I have followed the ROS's site instruction: http://wiki.ros.org/jade/Installation/Ubuntu, and did the following: First, setup my sources.list: ...
4
votes
0answers
18 views

Measuring vehicle's forward and lateral acceleration using a smartphone

I want to measure the acceleration (forward and lateral separately) using an android smartphone device in order to be able to analyse the driving behavior. My approach would be as follows: 1. ...
0
votes
0answers
21 views

How to use the code given in SLAM for dummies? [on hold]

I have been trying ti implement the code given in SLAM for dummies (http://web.mit.edu/16.412j/www/html/Final%20Projects/SLAM%20for%20Dummies%20presentation.pdf). Has anyone has used this code and ...
1
vote
1answer
24 views

Principle of virtual force - General help in understanding / explanation

I'm an Electronics student taking a module in Robotics. From the example, I understand line 1 as the Jacobian is found from the time derivative of the kinematics equation and such relates joint ...
0
votes
1answer
31 views

Quadcopter Flight Controller:Why does Using gyroscope data give better results?

I have succeeded in making my first quadcopter from scratch with a readymade frame. I designed the flight controller myself with help from YMFC-3D youtube series of videos. ...
0
votes
2answers
34 views

How can a quadcopter be made to hover perfectly still?

I need to get my drone flying still enough that I can rest a glass of water on it. I've tried a few KK boards and APM 2.6 (3.1 software). I've balanced props, set PID settings, auto-trim / autotune ...
0
votes
0answers
14 views

Control power with a Super Nintendo controller [migrated]

Can someone please explain to me the steps I would need to take to control an LED with a super nintendo controller? My buddy and I are building a couch powered by a few electric motors. I thought it ...
-1
votes
1answer
35 views

Diffrence between Degrees of Freedom (DOF) and Degrees of Motion (DOM)

Could anyone expain me shortly what is a diffrence between degrees of freedom (DOF) and degrees of motion (DOM)? I know that DOF is the number of independent movements a manipulation arm can make and ...
4
votes
2answers
42 views

How to check for a sharp angle with a line follower?

I have the mBot robot and I want to program it to follow the line. So far it can pass any kind of line that is >90°. I want it to be able to pass 90°-ish angles as well. Like this one: The problem ...
4
votes
2answers
53 views

How can my robot find its position in any given map without GPS, including when the initial point is not given?

Consider this map The Contest arena shown in figure 1 consists of two sub arenas, both the sides are identical to each other and their scientists and safe zone locations are similar. Each sub ...
0
votes
1answer
86 views
+100

How to apply A bang-bang signal of amplitude 1 N and 1 s width as an input force in Matlab?

I working on dynamic modeling and simulation of a mechanical system (overhead crane), after I obtained the equation of motion, in the form: $$ M(q)\ddot{q}+C(q,\dot{q})\dot{q}+G(q)=Q $$ All the ...
0
votes
0answers
33 views

8 wheeled vehicle model

I want the dynamic model for 8 wheeled robot. I expected to find it easily like the 4 wheeled bicycle model, but I couldn't. Here is my effort only for rotation not for feedback. From that I can ...
-2
votes
1answer
25 views
1
vote
0answers
14 views

Quality check robot [closed]

How to develop a robot based system to continuously monitor and check products for defeat which are moving on a conveyer belt using sensors and kick out the defect product from the queue?
1
vote
1answer
27 views

Testbed for testing navigation algorithms

I'm looking for a testbed (simulator or web-based interface that lets me to have control on a robot) for testing different routing and navigation algorithms. Is there such a system on the web?
0
votes
0answers
8 views

Yet another Lifepo4 charging question [migrated]

I have 16 * 3.2v 12AH Lifepo4 cells. I would like to use them as a 8*2 configuration, so to get 24AH 24V. I need 24V but could do with 12AH, 24AH would be better do. Now my question is, would it be ok ...
0
votes
1answer
33 views

Is my servo fried?

I got a new servo a few days back (RC Servo, Futaba FP-S148). I first tested it out with the Sweep sketch on Arduino, powering it with the Arduino 5v and GND pins only. It was working, just fine. ...
0
votes
0answers
9 views

Collision Avoidance System for APM2.6 [closed]

I want to establish a collision avoidance system to my quadcopter with APM2.6 . But I dont know what to choose I mean ultrasonic sensor or rangefinder. Could anyone help me ? Thanks.
0
votes
2answers
25 views

motor inertia tensor?

In modeling dynamics of a robot ,in which servo motor is adjusted inside the link, there is a need to find inertia tensor of the motor itself,Right? So if it is needed how can i get the inertia ...
3
votes
2answers
29 views

How can I improve ZED Camera precision?

I'm using Stereolabs ZED camera for my computer vision project. I did a small research about several sensors on the market and ultimately we decided to go with the ZED Camera. However I'm finding ...
0
votes
1answer
48 views

Designing Ackerman's Steering Principle for an autonomous robot [on hold]

I am working on a high speed autonomous robot (about 6-7 m/s), which does obstacle detection as well as senses traffic lights (I have used Raspberry Pi 3 and Arduino Uno). For the steering ...
4
votes
1answer
80 views

Implementation of inverse kinematics solution in c++

I am having some issue with implementing a least square solution of the inverse kinematics problem. The q configuration I get are rather large, or makes no sense, so I was hoping someone here could ...
1
vote
0answers
23 views

How to determine the angles between a UAV and a sphere

I have an UAV modeled in three dimensions with let's say position coordinates $p_{uav} = (x_1,y_1,z_1)$ that is moving in a direction $d = (d_x,d_y,d_z)$ and a moving obstacle modeled as a sphere with ...
0
votes
0answers
18 views

Vector Field Histogram: Is it possible to generate an occupancy grid without position feedback?

I am currently working on an autonomous quadcopter project using stereo vision for obstacle detection. I am planning to use VFH+ for 2D trajectory planning, meaning movements of the quadcopter are ...
3
votes
3answers
72 views

Generate transformation matrices for rotating around a object?

How do i compute all transformation matrices which places a robot endeffector at the shell of this sphere, with the end effector pointing toward the object in the center. I know at all time how ...
3
votes
1answer
45 views

Performing inverse kinematics based on a displacement of the end effector?

I think i have an simple problem, but can't my head around how i should resolve it... My setup looks like this: The grey box on end effector is supposed to be an camera, which measures a ...
0
votes
0answers
12 views

Cannot disable sleep in passive mode for iRobot Create 2

I tried to disable sleep by pulsing the BRC pin low for one second every minute as suggested in the OI, but my Create 2 still goes to sleep after 5 minutes. My firmware is ...
1
vote
1answer
52 views

Choosing the right Mecanum wheel

I am part of my college robotics team which is preparing for Robocon 2017. We have used Mecanum wheels in last Robocon competition, but we have faced huge slip and vibration. I have looked for all ...
1
vote
0answers
11 views

What frames are supported by the Dynamixel XL-320 OLLO?

I was recently looking into purchasing either a Dynamixel AX-12A or XL-320. The XL seems to use OLLO frames, which only seem to be available in a toy-like set. I was wondering if there are any other ...
0
votes
1answer
14 views

Getting “rospack package not found error” in ROS

I created a package in catkin workspace and put a publisher.py node inside the src directory of package which worked fine. Then i added another node subscriber.py node and used catkin_make to build. ...
0
votes
1answer
10 views

Kuka KR16L-2 robot simulation base and wrist rotation inconsistent with original robot

The issue is regarding simulation of Kuka robot KR16L6-2 in MATLAB using Robotics toolkit by Peter Corke. I wish to simulate the kinematic before passing a command to real robot for motion. I have ...
-1
votes
0answers
29 views

Which database to use for scientific literature search about robotics [on hold]

Each scientific area has its own database which you can search for specific literature (e.g. publications in scientific journals). Is there a recommended database for the field of robotics? BTW: For ...
0
votes
1answer
52 views

Suitable uC for atonomous robot

I am going to build an autonomous robot with Kalman-filter for localization integrated from Lidar, encoder, IMU and GPS. I will also add obstacle avoidance while moving to the required position. Is ...
0
votes
1answer
21 views

Is there a “follow me” Roomba/Create that works like a BEAMBot?

The diagram below shows an old BEAMBot strategy: Is there code or an example using this method? I would rather avoid OpenCV, ultrasonic, GPS etc. I just want the Roomba wheels to react as I go ...
0
votes
2answers
45 views

How do i construct i a transformation matrix given only x,y,z of tool position?

I am trying to implement a tracking application for a robot arm, which purpose is relocate itself based on the position of an object seen from the tool point. illustration: http://imgur.com/5oojXdh ...
0
votes
1answer
27 views

What type of actuator should I use? [closed]

I need to find out if There is a way to get at least 60 Hz of linear Motion with at least 5 mm of stroke that I intend to make linear persistence of vision device(not rotating one)It must be small and ...
1
vote
0answers
37 views

Directly observing lidar laser rays

I am working with SICK lidars and have to mount/unmount them quite often on my robot. The mounting process is very tedious especially when it comes to making sure that the lidars are horizontal. I ...
0
votes
2answers
79 views

Implementing an analytic version of an inverse kinematic

People have recommended me implement an analytic version of inverse Jacobian solver, such that I won't be forced only the least square solution, but would have an local area of solution near to the ...
0
votes
0answers
14 views

Does silver or copper bond more strongly to titanium? [migrated]

That's basically the question I have. Otherwise what are the strongest bond forming materials for welding titanium? They should preferably conductive, but in case I could make that work, otherwise ...
-1
votes
0answers
7 views

My BeagleBone Black does not turn on other than power LED turns on for a second [migrated]

The power LED just turns on for a second and turns off. I again tried with power adapter (5V 1A) and the mini USB cable but nothing else happens.
0
votes
2answers
33 views

how to find maximum force of a robot joint

I want to know if there is any equation that calculates the maximum force of a robot joint. The force that we should not exceed. For example in human leg, if we apply a big external force to the ...
0
votes
1answer
13 views

Dynamic Model of a Manipulator

I'm stuck on equation 4.30 of page 176 in http://www.cds.caltech.edu/~murray/books/MLS/pdf/mls94-complete.pdf This equation: $\frac {\partial M_{ij}} {\partial \theta_k} = \sum_{l=\max(i,j)}^n \Bigl( ...
1
vote
1answer
34 views

How to know the payload of the chassis from its motors?

I'm doing a mobile robot project with robotic arms, I wanted to buy a chassis for my robot that can carry enough weight, but many websites don't give definitive answers about maximum payload. Is ...
0
votes
1answer
29 views

Smart Home Model with Raspberry Pi

I'm still new to RPi and I am currently trying to do a smart home model. I planned to use RPi only to control 5 servos (which will be controlling the open/close of the doors by setting the angle) ...

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