Questions tagged [wheeled-robot]

Wheeled-robot is a subtype of mobile robots which uses motor driven wheel(s) to be able to move.

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172 views

Dynamic model of two wheeled mobile robot

I wanted to design a LQR controller for my two wheel mobile robot. What are the equation of two wheeled mobile robot can be rearranged into state space model? My two wheeled mobile robot is nonlinear ...
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153 views

State space model

I want to design a LQR controller for my two wheeled mobile robot. While designing the controller, I need to find gain, K for the LQR which this required the state space model of wheeled mobile robot. ...
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0answers
25 views

How to mount encoder without rear shaft?

I am interested in this robot chasis: 4 wheel robot chasis There is no information on how to install encoders although the manual says it has space for encoders. The page says that the motors do ...
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3answers
975 views

Balancing robot - How to control the velocity and angle

We are currently making a balancing robot as a school project. The robot has a gyroscope and an encoder to get the angle of the robot and the rpm of the wheels. By using the current angle of the ...
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2answers
240 views

How to locate an object on a known surface

I am building a small robot on wheels. The robot will be moving at a small speed in a square area of known dimensions. I need to locate the robot and know its position at any given moment so I can ...
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3answers
1k views

How to increase the traction of tyres/wheels

I’ve developed a basic robot that navigates around my son’s Duplo train track. It works find on the flat parts, but once it reached an incline at the start of a bridge, the wheels just spin and the ...
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3answers
639 views

Line-following robot with a 5th wheel

Both of these 4 wheel drive line following robots have a fifth wheel in the rear. My first thought is, that it is used as a braking mechanism. Would that be the case? If so, could someone explain - ...
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1answer
163 views

Robot positioning problem

The problem i am facing is to try and calculate the x and y position of a robot with dead reckoning. Reading from the encoders and getting proper rotations of the wheels of my robot works. The robot ...
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1answer
567 views

Wall following robot oscillates heavily

I have a mapping robot , 3 ultra sound sensors HC SR04 , arduino uno board, two motors MG-6-120, power source 2 5v 4000 mAh power banks, driver L298N. It uses a wall follower algorithm (here is the ...
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1answer
45 views

How Do You Program the SR04 Ultrasonic Sensor?

Dear Robotics Community, I am participating in a Robotics tourney that will start in a few weeks. The challenge I signed up for is to deliver and dump ping pong balls to a box. I already have my ...
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0answers
46 views

What algorithm should I use to make a dynamic Line following robot? [closed]

I want to make a LFR using IR sensor. Till now I coded my robot according to the track I am going to participate in. So it won't work on any other track. But now I want to code it in a way that it ...
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1answer
401 views

Control of WMR (Wheeled Mobile Robot) in 3D

I've implemented SMC (Sliding Mode Controller) on WMR in both X-Y and X-Z plane. Now i want to combine both of these to control WMR in 3D. For this purpose I'm trying to use resultant vector of ...
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2answers
116 views

Permanent Magnet DC Motor Calcuations

I have to determine speed and torque suitable for my combat robot. I've done some calculations and I need to know whether they're right or not (because they don't seem to be right). Suppose I have ...
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2answers
1k views

How to move a robot to a point while avoiding obstacles?

I am trying to move a robot in a straight line from point A, to point B. The robot's primary sensor is a Hokuyo URG-04LX-UG01 LIDAR that gives me the magnitude and direction of each point it detects ...
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1answer
34 views

What parameters can be/should be looked on while deciding to work with a microcontroller in a bot

I understand that choosing a microcontroller is all based on the needs and that there is no perfect Mcu.presently I have to select an MCU for a robot my team is building for the 2018 Abu robotics ...
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1answer
143 views

TWIP robot - DC gearmotor speed/Encoders

I'm working on a self-balancing TWIP (Two-Wheel Inverted-Pendulum) robot project which will be using two brushed DC gearmotors with encoders. As there were no speed constraints for the robot (and ...
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2answers
257 views

Fire Fighting robot searching for fire in arena algorithm

i am working on a firefighting robot and i am struggling to find a way to search all rooms in an arena like this i thought of using the Wall follower rule but it will miss a room , if i am ...
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3answers
22k views

What are the signs that a servo might be broken?

I just got a kit and im not sure if its me or not but it appears one of the continuous servos might be broken. What happened first when I plugged it into the microcontroller, it made a humming sound ...
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1answer
42 views

Thermal Imaging camera activation upon detection

So I am planning on building a robot that turns on when it detects some kind of heat source, I am currently looking at thermal imaging cameras, but am not sure as to how to go about writing code to ...
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1answer
302 views

Handling PID DC motor control at low speeds

I am building a 4 wheel rover and am using PID DC motor control for the back set of wheels. The feedback for the speed is provided by Hall effect sensors, with two pulses per rotation. This means ...
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1answer
94 views

Do I need to use separate function in PID algorithm to make the bot go LEFT or RIGHT?

Do I need to use separate function in PID algorithm to make the bot go LEFT or RIGHT? ...
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2answers
19k views

Wheels vs Continuous Tracks (Tank Treads)

I'm building a small robot using some cheap Vex Robotics tank treads. However, my choice of picking tank treads is almost purely based on the fact that they seem like more fun than wheels. I don't ...
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1answer
307 views

Do the distance function and steering function in an RRT have to be related?

I am developing an RRT (rapidly exploring random tree) for car-like robots in SE2 space using Dubins steering function and have a question that has implications on the performance of RRTs. In order ...
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0answers
58 views

Theory behind wheeled inverted pendulum robots [closed]

I'm trying to get a deeper understanding of the theory behind wheeled self-balancing robots. Can anyone point me to a text on dynamic modelling and control theory that might help?
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1answer
29 views

What is are digitally-mated pairs

I am considering competing in the robogames, but the rules require that R/C bots have digitally-mated pairs. I am not sure what these pairs are. For reference here are the rules for robot sumo and ...
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2answers
438 views

Two-wheeled self-balancing robot - Choosing the control system

Would an Arduino Uno have the precision-timing required (using only firmware) to control a two-wheeled inverted pendulum robot, or would it need a RTOS? Note: Thanks for both answers, they both ...
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2answers
245 views

Motion planning and robot controlling

I am stuck with understanding how can I make my robot move along planned path. For instance, if we have a grid map of an environment and applied, for example, A* to plan a path then after that we have ...
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0answers
36 views

What type of wheel is preferable for a soccerbot?

After a few days,there will held a competition in our varsity.in this competition the task is,my robot will have to play soccer.this is a one to one manual game.I am thinking of building a robot ...
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1answer
1k views

Arduino robot to move spirally

I am planning to build robot like irobot Roomba. So cleaning in a spiral pattern is required like the image shown starting from the center: This code is part of my full code which doesn't give me ...
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2answers
86 views

Detect road surface in a traffic scene point cloud

I want to analyze a traffic scene. My source data is a point cloud like this one (see images at the bottom of that post). I want to be able to detect objects that are on the road (cars, cyclists etc.)....
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6answers
6k views

Robot never goes straight

I am using 2 identical DC motors and a castor wheel. The motors are connected to L293D motor driver and are controlled by RPi. The robot is not going straight. It veers off to the right. I am ...
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1answer
260 views

How to Calculate the Translational and Rotational Velocity of a 4 Wheeled Robot?

I have a robot with a 4 wheel drive using mecanum wheels to allow for more mobility. For the engineering documentation I am looking to find both the translational velocity and rotational velocity of ...
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0answers
230 views

Visual SLAM for wheeled robot

I would appreciate your help for choosing the appropriate real-time SLAM algorithm. I am interested in having autonomous robot, thus a SLAM component is needed for autonomous navigation. The ...
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2answers
407 views

Robot won't work properly, claw will only go one way and will only open or close once per cycle

We're students trying to make a clawbot for a Science Seminar class. However, for some reason, whenever we try to move the arm or the claw in a certain way, it will lock up and only move that ...
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1answer
102 views

Road Detection When the Robot is Off-Road

I'm trying to make a lightweight method of outdoor road following for a small ground robot. In nearly all road detection work that I've seen, they all assume that the robot is already on the road, ...
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2answers
2k views

Self balancing robot control system strategies [closed]

I’m in the early stages of designing a self-balancing robot as a way to refresh my knowledge on control theory, which has been gradually slipping away since graduating about a year and a half ago. I'm ...
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1answer
72 views

Could anyone complete my challenge? [closed]

Earlier while writing by hand, I was wondering if anyone could build a pen holder, that could write for me? Maybe you could make some good business from them. Thanks for your time.
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1answer
128 views

Can I use a FTC regulation phone to use the camera on multiple tasks?

PREFACE: THIS QUESTION REGARDS FTC ROBOTICS I am aware that a question similar to this exists on SE and I have looked at it, but the solutions provided did not solve my problem, and the nature of my ...
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1answer
721 views

How to implement a particle filter when sensors can't identify landmarks?

I'm attempting to build a robot that leverages a particle filter to identify where it is relative to a map that is known. The robot only has IR sensors, so while it is able to determine its distance ...
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1answer
62 views

Is there any robot stability control equation that describes the relation between velocity of the robot and its orientation?

Let’s assume at time t a moving robot (e.g. PIONEER 3-DX) changes it’s steering angle by $25^{\circ}$. Obviously, in order to maintain stability and avoid overturning, the robot must reduce its ...
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1answer
58 views

Is it possible to detect road surface or navigation area using LRF data or other laser data in a Park?

I would like to detect road surface in a park. In the park, only small grass are covered with the both side of the road. That means there is road and the both side of the road are covered by small ...
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1answer
2k views

Implementing pure pursuit problem in robot navigation? [closed]

I would like to implement pure pursuit waypoints navigation. we know that, look ahead distance=look ahead gain*vehicle forward velocity How can I calculate look ahead velocity gain/look ahead gain? ...
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2answers
171 views

Choosing motor to buy after calculations

I am building a two wheeled robot which will have: max speed of 10km/h and acceleration of 0.5m/s² can climb 12° slopes weighs at most 30 kg wheel diameter is 50cm By doing the calculations myself, ...
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1answer
115 views

How has the Mars Exploration Rover (MER) has been working for 11 years if it was designed for 90 Sol? [closed]

The Mars Exploration Rover (MER) Opportunity landed on Mars on January 25, 2004. The rover was originally designed for a 90 Sol mission (a Sol, one Martian day, is slightly longer than an Earth day at ...
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1answer
51 views

Base for home robot of a bigger size [closed]

I am trying to build a robot. But a bigger robot than a Raspberry Pi connected to some tiny something as big as a can of black Coke. I am planning to build a robot of a size 1.2-1.5m. I already have ...
3
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1answer
108 views

Fit robot simulator to robot

I have odometry data $(x, y, angle)$ of a real two-wheeled robot, who received control commands $(forward speed, angular speed)$. Now I want to code a motion model (in C++ (/ROS)) which should follow ...
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1answer
191 views

Robot positioning using IMU quaternion data?

I want to use a MPU9150 to give me the position (XY) and heading (angle) of a wheeled robot. This MPU9150 from invensense has a Digital Motion Processor in it which can give me a quaternion. But how ...
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1answer
5k views

How to find Friction or Viscous force b (nmsec) in DC motor

PLease guide me How to find Friction or Viscous force b (nmsec) in DC motor for a particlar speed. The motor is connected with a gear and the ration is 26:1 I want to find for 200 rpm and the motor ...
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1answer
90 views

Find object using only distance

I'm working on a extremely simple robot (very first project) that attempts to find the source of a Bluetooth signal. There are two motors that drive the platform and each has an encoder. We've already ...
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1answer
243 views

How can I switch between Autonomous mode and usercontrol?

I want to switch from usercontrol to autonomous. When I have the program running for 120 seconds, how come it wont automatically switch in autonomous mode? Thanks! ...