# All Questions

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216 views

### Two State Linear Actuator

I need two state linear actuator. You can have a look at the picture to understand what I mean. Don't care about the hand ! (source: robaid.com) I need to electrically move the things like this ...
6k views

### What are some low cost alternatives for lidar? [closed]

It need not be as effective as lidar or it may have some disadvantages when compared with lidar. What are the probable alternatives? Edit: I'm intending to use it outdoors for navigation of ...
677 views

### Linear slider motor mount location - Pros/cons

I'm currently designing a linear camera slider, that will be used to hold camera equipment weighing just about 15 Kgs including all of the lenses and monitors and everything else. For those who don't ...
233 views

Actually , I have been since two weeks looking for convinced and final solution for my problem , actually I am completely lost , I am working on mobile robot (Rover 5) with 2 motors , 2 encoders . the ...
316 views

### kinect - development kit to aid obstacle-avoiding robot?

Some friends and I are interested in working on a robot. I know little to nothing about robotics, but do have a lot of experience with programming. Before we start, I am hoping that I can find some ...
657 views

### Can't Read current on Pololu Dual MC33926 Motor Driver Shield for Arduino

I purchased a Pololu Dual MC33926 Motor Driver Shield for Arduino, and for some reason I cannot read current from the motor controller. On the Serial.println() it just prints weird data (garbage), and ...
344 views

### Use linear quadratic regulator to minimize output error

I would like to create an Infinite-horizon, continuous-time LQR with a cost functional defined as $$J = \int_{0}^\infty \left( e^T Q e + u^T R u \right) dt$$ where e is the states' error $x-x_d$, ...
111 views

### Laser Beam based model probability in case of single particle

I am trying to calculate likelihood of laser scan($Z$) at give pose($x$) with known map ($m$) using beam based model $P\left(z_t|x_t,m \right)=\prod_{i=1}^{n}P'\left(z_i|x_t,m \right)$ My scan ...
804 views

### Are consumer grade CNC machines capable of cutting tile?

I'd like to slice and dice floor tile into pieces so I can arrange it in geometric patterns. I have CAD designs for the parts. Would any consumer grade CNC machine be capable of doing the job?
103 views

### What is a PID as is related to quadcopters [duplicate]

I'm trying to make a Quadcopter from scratch, I have a fair amount of experience with adruinos, and I'm trying to understand how to necessary systems work, and I can't seem to figure out what PID ...
260 views

### Non-linear complementary filter on so3: Corrected equations?

While reading the paper "Multirotor Aerial Vehicles: Modeling, Estimation, and Control of Quadrotor" by Mahony, Kumar and Corke, I stumbled across the following equations for a non-linear attitude ...
795 views

### PD Algorithm for a Quadrotor [Simulation]

I have a big problem trying to stabilize a quadrotor with a PD controller. The model and the program has been written in C++ and the model dynamic has been taken from this source in internet: Well, ...
189 views

### Reverse lift mechanism

I have made a RC robot from a wheelchair and I'm planning to attach a snow plow. I'm wondering if there is any mechanism that would be able to lift the plow when reversing. I have only 2 channel ...
183 views

### Using kinect for medical application but without computer. Is it possible?

I have to use kinect for an application. However, the final work must be mobile: it means no computer. Consequently, I thought using a microcontroller to handle data from kinect. But is it possible? ...
2k views

### What are the calculations for a badminton robot and mechanisms?

I am designing a badminton robot but i am very confused about mechanisms needed for a badminton robot and various calculations needed for millisecond response.I am also confused about calculations ...
5k views

### How to control an Arduino Board with wireless PS3 controler?

I'm currently building a hexapod bot, composed with an Arduino Mega board and an USB SSC-32 (from Lynxmotion). But now I want add a PS3 wireless controller to move my hexapod, I have made some search ...
105 views

### Velocity derivatives using Quaternions [closed]

How to compute the angular and linear velocities Quaternions? I am new to this area and although I have studied the algebra I am unable to understand how to compute the velocities.
183 views

### Can we use this line sensor as a proximity sensor?

I have an RSL Line Sensor which is designed to distinguish black and white lines. It detects white surface and gives me digital 1 as output, with 0 in case of black, but the surface needs to be close ...
753 views

### Yaw angle calculation for drone PID from two distance sensors

I'm building a control system with a Parrot AR 2.0 drone where I have access to thrust controls for up/down (z), left/right (y), forward/backwards (x), turn left and turn right (yaw) through a Ruby ...
1k views

### 12V Arduino Dual Bridge to supply at least 5A [closed]

I am looking for a 12V Dual Motor Controller that can supply at least 5A per channel for two 12V motors, and that can be used with an arduino. Do you know of any product with those specs? Thanks
769 views

### Purpose of programming an ESC

I am planning to buy an ESC for my tricopter setup. What is the purpose of programming an ESC? I am cost effective and is it really necessary that I should necessarily buy a programming card to ...
431 views

I am tuning PID for quadcopter, the problem i have is that with different base Throttle, i seems that i have to adjust different PID gains in order for the quadcopter to balance!
281 views

### Ensemble Kalman Filter SLAM

I know that there is an extended kalman filter approach to simultaneous localization and mapping. I'm curious if there is a SLAM algorithm that exploits the ensemble kalman filter. A citation would ...
584 views

### Correcting GPS track with visual odometry (sensor fusion)

I am trying to build low cost and precise outdoor positioning. I explored NS-RAW with RTKLIB - this would be doable but probably will need either a base station to get the correction data for rover or ...
61 views

### How can one create a robot which respondes to input following a flowchart?

What are the most basic skills and components needed for creating a robot which gets two "yes" or "no" inputs with two push buttons, and goes down the defined flowchart and plays the relevant audio ...
1k views

### Pledge algorithm for maze solving robots

i saw this maze, and tried to apply pledge algorithm on it. But i am not able to solve this maze using this algorithm. what am i missing? i want to ask, what i am doing wrong? PLEDGE ALGORITHM: in ...
1k views

### Whats the logic to implement a particle filter for a robot with range sensor?

I am trying to implement a particle filter for a robot in Java. This robot is having a range sensor. The world has 6 obstacles - 3 in the top and 3 in bottom. I am calculating the distance of the ...
4k views

### Euler Angles from 9DOF IMU

Using the Adafruit 9DoF module I Need to convert the Accel + Magneto + Gyro into Euler Angles for a motion capture application. Any hints on where to start? Managed to get X,Y,Z when the IMU is ...
47 views

### which type of camera should be used for detecting road lanes for good processing in matlab [closed]

What are the parameters which should be selected to choose camera for lane detection system.What parameters should be kept in mind (like picture quality,frame rate,cost e.t.c). Which camera will suit ...
159 views

I am bulding a quadcopter using these compenents: Microcontroller: Tiva C Lanchpad (ARM Cortex M4 - 80 MHz), but running at 40MHz in my code MPU 9150 - Sensorhub TI ESC - Hobbywing Skywalker 40A I ...
76 views

### Robot Loud Alarm

We are working on a project where we want to sound an alarm if somebody is messing around with our Robot (e.g., the Robot is being shaken abruptly or the cameras/LIDARs are blocked). I am using "loud ...
514 views

### How to get pure end-effector translation through Jacobian?

I have a 7 DOF arm that I am controlling with joint velocities computed from the Jacobian in the standard way. For example: $${\Large J} = \begin{bmatrix} J_P \\J_O \end{bmatrix}$$  J^{\dagger} = ...
4k views

### DC motor control - speed-torque curve

I am having some trouble understanding how to practically use the speed-torque curve of a DC motor. I understand that the gradient of the speed-torque curve is defined by the design of the motor, the ...
972 views

### How to calibrate an IMU unit?

Simply , how can I calibrate IMU unit ? I read some papers about this topic and was wondering if there are any standard methods.
461 views

### What's the most adapted programming language for Robotic and principally AI? [closed]

I'm currency a Web programmer and I'm very passionate by robotics and specialty for Artificial Intelligence. I have already make some C++ program for Microship and Arduino for little robots and ...
308 views

Im trying to develop a system that autonomously navigates a large outside space, where accuracy is vital (GPS is too inaccurate). There are a number of options but have largely been used inside, has ...
3k views

### Ackerman steering model

I am trying to create a simulation of a robot with Ackerman steering (the same as a car). For now I'm assuming that it's actually a 3-wheeled robot, with two wheels at the back, and one steering wheel ...
2k views

### How to calculate Altitude from IMU?

How to calculate attitude from IMU ? For example, mathematical equations
94 views

I have just built my first quadcopter, and have run into a bit of a snag. When I plug in the power, I only get one beep and a red blink from the flight control board, and nothing else happens. When I ...
574 views

### Servo controlled valve

I am trying to build a servo-controlled water valve. Max pressure 150 psi , valve size 1/2". Can anyone recommend a suitable 1/4-turn valve, either ceramic, ball valve, or anything else that is easy ...
543 views

### how to make Mac detect AVR board using USBasp and burn program to it?

I am new to Embedded, starting with AVR programming using C. I am working on Mac OS 10.9.4, so far I am using avrdude and xCode as IDE. It works very well, for now I am testing my code using Proteus. ...
515 views

### image size vs image resolution

I read somewhere that in the case of photoshop for example, the size refers to the number of pixels an image contains, but resolution involves the pixel's size, I don't know whether this definition ...
496 views

### Need to clear some concepts: AHRS - Attitude - Yaw,Pitch and Roll - MARG sensors -INS

it's been while since I started reading about INS, orientation and so for quadrotors . I faced the following terms : AHRS - Attitude - Yaw,Pitch and Roll - MARG sensors I know for example how to ...
93 views

### What's the difference between Yaw and Attitude in Quad Rotor

I have a big miss conception between Yaw and attitude ? Isn't both represent "how far is the quad from earth ?" Also if you could post how to calculate them from IMU (gyro +accele + magent )
4k views

### Choosing motor for a tricopter

I'm a newbie in RC field..I am planning to construct my first Tricopter ever. Can anyone help me to find the power rating to select the motor for a tricopter? I am at the beginning stage of ...
2k views

### Pulse Position Modulation as used in RC controls

How are several channels multiplexed down to a single physical wire? If two channels are transmitting the same value in the same frame, wont there be an overlap of the pulses?
436 views

### Assumptions about the nature of landmarks in SLAM algorithms

I'm trying to understand the role of landmarks in SLAM algorithms. I've glanced over a few books concerning landmark based SLAM algorithms and I've come up with a rudimentary understanding which I ...
2k views

### Is there any advantage to velocity motion models over odometry motion models for SLAM?

I've seen several examples of SLAM algorithms (EKF SLAM, Graph SLAM, SEIF SLAM) written in terms of the velocity motion model. I have yet to see an example of any SLAM algorithm utilizing the ...