Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [orientation]

The tag has no usage guidance.

1
vote
2answers
42 views

Inverse kinematics with end effector orientation?

I'm trying to implement an inverse kinematics solver, but this time even with the end effector's orientation. I succeeded with the case when the end effector only requires the position. I learned ...
0
votes
1answer
30 views

Orientation from magnetometer data

I saw lot of topics with the same title but answers are different. I have a magnetometer in my phone which give me the components of magnetic field in direction of X, Y, Z. If my phone lays on a ...
0
votes
0answers
31 views

Subtract Gravity from IMU

I know there are a lot of questions regarding this topic but I need clarification to help find my error. I want to track the position of a human hand with an IMU. I know the approach is bad because ...
0
votes
1answer
17 views

Fixing robot orientation using AR

I am creating a project where a robot needs to face a control panel and do some specific tasks. Some reference tags will be placed on the panel. I want to use the tags as AR reference and fix my ...
0
votes
1answer
106 views

Orientation estimation using gyro and accelerometer when sensor platform has high acceleration

I am trying to estimate the orientation of a sensor platform using gyroscope and accelerometer. I am using a Kalman filter based approach. I integrate the readings ...
0
votes
1answer
88 views

Solving Inverse Kinematics with unknown orientation

This may be a very basic question, but I haven't had much success finding an answer. I'm currently trying to solve the inverse kinematics of a 3-RRR Planar kinematic arm, whose purpose is to move ...
0
votes
0answers
34 views

Kinematic Kalman filter and state estimation of a robot without wheels

I have a question about the Kalman filter for state estimation, I'm working on the state estimation of a robot, I should be able of tracking its position, my tutor recommended me to make an estimate ...
1
vote
2answers
283 views

Inverse kinematic orientation problem

I am trying IK for 5-DOF robot all revolute joint. I am working IK with Jacobian inverse i.e end effector velocity = J inverse * error vector. In error vector I am feeding (x,y,z) positional error; ...
1
vote
1answer
296 views

Yaw from accelerometer? No! So what do these equations actually mean?

note: I'm just a day or so into the use of inertial measurements and trying to learn everything at once, this may be a noob question (it's my first here). I have seen this image of "Figure 8" in ...
2
votes
1answer
116 views

Inferring joint orientation on multi-joint arm

Not a robotics question in the strictest sense, I guess, but related closely enough, I hope: I have an arm-like articulated two(-plus-one)-joint appliance that I want to use as a 3D input device. It ...
3
votes
2answers
619 views

Multicopter: What are Euler angles used for?

I hope you can help me and this is the right forum to ask. In the process of building and programming my own Quadcopter, I encountered the term Euler angles. I took some time to understand them and ...
0
votes
0answers
23 views

Confusion regarding set point calculation in presence of non-zero yaw in quad-rotor

I have recently started working on a project to fly a quadrotor through a Matlab interfaced software and I was going through their sample controller code. A function called "adjusted pitch and roll ...
1
vote
0answers
58 views

How unique are Quarternions and what about the sign?

I want to track a robot's orientation in space and wanted to choose quaternions for their many advantages. However I have a few questions that I haven't found to be solved anywhere. The method I use ...
1
vote
1answer
555 views

Handling GYROSCOPE BIAS DRIFT

I am working on a MEMS based project which requires me to calculate the orientation(Euler Angles) of an object using only GYROSCOPES. The GYROSCOPE BIAS is calculated in the beginning for 2 seconds ...
6
votes
2answers
162 views

Paradox: I can't use accelerometer measurements to obtain information about my states in a quadcopter?

I'm currently developing an EKF to estimate the position and orientation of a quadcopter. My state vector is comprised of 3D position, 3D velocity, 3 euler angles and the angular velocity vector. ...
4
votes
2answers
843 views

Is there a way to measure 3 axis orientation without a magnetometer?

I have bought an STM iNEMO evaluation board in order to monitor the inclination of a separate magnetic sensor array as it moves in a linear scan outside of a (non-magnetic) stainless steel pipe. I ...
0
votes
1answer
41 views

Orienting rectangular plastic bricks [closed]

As part of a sorting machine, I need to orient a pile of plastic brick-shaped objects (which are all identical in size - about 3cm x 2cm x 1.5cm) so that they always end up with the white side facing ...
1
vote
0answers
72 views

Accurate technique to locate position? [closed]

What is the most accurate way to locate the position and orientaion of the body during some motion (rotation and translation)? I need to track the body very precisely, the required accuracy is 100-...
4
votes
3answers
201 views

Discontinuity in device orientation

Why is there a discontinuity in the quaternion representation of my device orientation? I'm using a SENtral+PNI RM3100+ST LSM330 to track orientation. I performed the following test: Place the ...
3
votes
3answers
1k views

Forward kinematic computing the transformation matrix

I am the moment trying to compute the transformation matrix for robot arm, that is made of 2 joints (serial robot arm), with which I am having some issues. L = 3, L1 = L2 = 2, and q = ($q_1$,$q_2$,$...
2
votes
2answers
807 views

Manipulator end-effector orientation with quaternions

I have the following problem: Given 3 points on a surface, I have to adjust a manipulator end-effector (i.e. pen) on a Baxter Robot, normal to that surface. From the three points I easily get the ...
1
vote
3answers
752 views

Sensor orientation of an external magnetometer [closed]

On many drones are already external magnetometers. Unfortunately, the orientation of such sensors is sometimes unknown. E.g. the sensor can be tilted 180° (pitch/roll) or X° in yaw. I was wondering, ...