# Questions tagged [imu]

Inertial Measurement Unit

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### Is increasing gyro , accelerometer sensor range is good or bad ? how does it affect the accuracy

I've been using mpu6050 IMU unit ( gyro + accelerometer ) I found that I can set acc range to +/- 2g or 4g till 16 g and same for gyro +/- 250 deg/sec , 500 deg/sec and so I know that they are ...
5k 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 ...
2k views

### How to calculate Altitude from IMU?

How to calculate attitude from IMU ? For example, mathematical equations
1k 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.
111 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 )
497 views

### Simon K firmware when the IMU outputs at 50HZ

I am building a Quadcopter using the Sparkfun Razor IMU which outputs the Roll, Pitch and Yaw axes values at 50 Hz, which limits the operations of the controller(implemented on Arduino IMU), to 50 Hz ...
811 views

I have built a quad copter completely from scratch (electronics, mechanics and software). I am now at the point where all my sensor data looks correct and when I tilt the quad copter the correct ...
75 views

### How to use TOA (Time Of Arrival) to measure 3-axis location of a wireless device? [closed]

I need to read the location of my device within a 1m radius sphere, with accuracy of 5-10cm. The device is handheld and wireless, and currently communicates using a Bluetooth v4 chip. I could add an ...
1k views

### How to measure displacement, cheaply and without using an accelerometer?

Motion is known to be confined in a sphere with radius of about 0.5m, and resolution doesn't have to be very high (5cm is enough). The device will actually be incorporated in a toy designed for kids. ...
345 views

### Arduino for simple Data-Glove. Should I go with Mega or Due?

First, I'm a beginner in MCU/Robotic world (been working with ATMega+CVavr, but that's all). so please bear with me. I'm making a prototype data glove (Like KeyGlove, but much more simpler), it ...
4k views

### Tracking with accelerometer and gyro versus multiple accelerometers

I'm building quadcopter and most of the control systems use one accelerometer and gyro. I've read few papers and usually accelerometer is used as reference to the ground because gyro slowly drifts ...
493 views

### Is there a benefit to using 2 IMU units on a UAV set at different sensitivities?

I noticed that some IMU units are tuned to be sensitive to small changes, other to large changes and some that can be adjusted between different sensitivities. I am familiar with the use of a Kalman ...
297 views

### At which stage should filtering be applied to the sensors data?

Shall I filter (kalman/lowpass) after getting the raw values from a sensor or after converting the raw values to a usable data? Does it matter? If so, why? Example: Filter after getting raw values ...
521 views

### Chaining Kalman filters

My team is building a robot to navigate autonomously in an outdoor environment. We recently got a new integrated IMU/GPS sensor which apparently does some extended Kalman filtering on-chip. It gives ...