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Questions tagged [acceleration]

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24 views

How to subtract gravity from raw acceleration of an MPU9250

I'm working with an MPU9250 and using the Madwick Filter. For what I know I need to subtract the GRAVITY from my X, Y, Z acceleration values, basically, some kind of gravity compensation to get linear ...
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0answers
50 views

How to compare two acceleration sensors side-by-side?

I have a single axis analog capacitive acceleration sensor (from PCB Piezotronics) which is very reliable but expensive. Now I need more axis, unfortunately can not afford buying anymore. So I have ...
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0answers
20 views

How to choose order and cut-off frequency for low-pass Butterworth filter?

When using IMU data (accelerations and angular velocities), many papers use a 4th order low-pass butterworth filter with a cutoff frequency of 5 Hz. However, none of them really justify why those ...
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2answers
29 views

Order of matrices when rotating a vector

I would like to calculate the vertical velocity of a drone by integrating accelerometer data, problem is that the accelerometer measures in the frame of reference of the drone and not the the earth. ...
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1answer
45 views

Angular acceleration and the moment of inertia

The wheel is made from a 10-kg thin ring and four 0,5-kg slender rods. If the torsinal spring attached to the wheel's center has a stiffnes $ k = 2 N*m/rad$, so that the torque on the center of the ...
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16 views

Newton Euler Formulation for open chain prismatic-revolute-prismatic manipulator

I am new to using Newton Euler method for modeling dynamics and was wondering if anyone could clear something up for me. The manipulator I'm trying to model is a PRP open chain robot like in the ...
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1answer
68 views

Minimum required rolling friction between pulley and the rope

The 40 kg weight accelerates and runs on a rope from 0 to 50 km/h in 10 seconds. I want to calculate the minimum required rolling friction that I need (acceleration without slipping) to achieve ...
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37 views

Is it possible to protect electronics on a cubesat from 100-1000g of acceleration

I am currently researching the feasibility of setting up a coilgun that launches Cubesats for a paper.
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2answers
68 views

Calcultate speed from accelerometer for runner

I hope you are well. I am writing to you because I am working on a sports project and I have a little trouble interpreting my results. we placed the accelerometer on the legof a runner and we have ...
2
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1answer
84 views

Dynamics of a rigid body in a system of two linear drives

I've been trying to solve the dynamics of this system for quite a while, but cannot seem to get the right answer. I've tried solving it with Lagrangian method but I am not so confident with the ...
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0answers
214 views

Conversion from LSB to mg not making sense for accelerometer

I have a BMI088 and am trying to get an accelerometer reading. The data sheet and specs for Bosch Sensortec are here: The sensitivity per range is this (its a 16 bit signed integer): ± 3 g: 10920 ...
2
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1answer
52 views

Robot velocities based on IMU data

I'm currently stuck on obtaining a description of the robot base velocities (xdot, ydot, thetadot) based on data obtained from 4 IMU sensors located, with an offset, on 4 pivot points. See picture ...
2
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2answers
359 views

Calculate maximum acceleration of a car from rest (optimum launch)

First disclaimer: I have a background in math, but I'm no expert in engineering or physics. This is the first question I've ever posted and I think it belongs here, but please let me know if belongs ...
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2answers
75 views

How do I measure max oscillation of building using accelerometer?

For my school project, I am trying to measure the effect of a mass damper by changing the length of the string (that carries the mass), my setup is similar to the following video: https://youtu.be/...
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1answer
63 views

How is train speed calculated in OpenRails?

I have been playing OpenRails Train SImulator recently and I thought i made my own train(which i did), then the physics part came up. It required me to fill in a lot of parameters, like braking, ...
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1answer
30 views

Power needed to accelerate metal powder through two spinning wheels

I have a wheel which has a radius of 0.1m that needs to spin at 10000RPM. The outer surface of this wheel is pressed up against another free spinning wheel like a football or tennis ball launcher. I ...
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1answer
15 views

methods of propulsion of hydrogen plasma

What would be the best method of accelerating a continuous flow of hydrogen plasma to 300 000 m/s. I have thought about a rail gun approach but don't think this would be suitable for these speeds or ...
4
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1answer
310 views

Calculating gyro data from accelerometer, pitch, roll and yaw

I am currently collecting accelerometer and attitude data using smartphone sensors. Data is collected at 100Hz over 2.5 seconds. Of which there are 250 accelerometer points and 250 points representing ...
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1answer
95 views

Rapid acceleration and deceleration of Space X's BFR

Given that momentum is the product of speed and weight (Velocity x Weight) would rapid deceleration or acceleration in weighless space, of Space X's BFR have an impact on its passengers. I ask because ...
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23 views

Linear Guidance law into X-Y axis

Im currently writing a model for a guidance law named Maintaining Guidance law. The law looks as following: $$ a_{M} = [K_1,K_2]*[\dot{\lambda_T} ,\dot{\lambda_D}]'$$ Since im using a linear model I ...
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1answer
95 views

Theory on tangential acceleration [closed]

b) I dont understand how to take the integration like its integral of ft from 0 to 2 pi = integral of velocity, and the integral of the first is the area under the graph= 8j and then I dont know how ...
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3answers
139 views

4 Way Bugatti Tug of War

The reasoning for this question comes out of pure curiosity. say if there were, for example 4 bugatti veyron's ( represented by the rectangles on the diagram) all starting from the middle and all ...
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3answers
152 views

Measuring the road surface quality

First of all, excuse my little knowledge, I'm a computer programmer by trade and unfortunately have very little knowledge of physics, engineering, DSP but I'm willing to learn. I would like to ...
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1answer
39 views

How to drive a gear system to wear out fast

i am designing an experimental platform to test some 3D printed gears that i am designing. i want to test the durability and what i am looking for is a way to make them wear out fast. i will basically ...
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2answers
103 views

Can a six-wheeled F1 car have a better acceleration profile than a typical F1 car? [closed]

I wonder whether the P34 died too soon. Basically, I'm wondering whether the additional pair of wheels could have conferred the car any advantages that, if solved, would have given it an advantage ...
4
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1answer
437 views

Optimising driving speed of stepper motor for maximum acceleration by trial and error

I'm writing code for a microcontroller that will ramp up the speed of a stepper motor as quickly as possible, for a jig that I'm building, that moves a workpiece from one position to another along a ...