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Engineering Stack Exchange

Questions tagged [acceleration]

61 questions
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3 answers

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 measure the quality of a road surface when riding on it…
Johannes Weiss
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1 answer

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 the attitude of the device. I am looking to…
lfs
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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 linear rail. This question is not about modifying…
Jayy
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How do rollercoaster designers calculate the ideal curve?

I've been looking into rollercoaster track designs and wondered how they mathematically calculate the ideal curves to fit some specific layout without creating excessive Gs or other rider discomfort or for maximising speeds. One thing I do know is…
WDUK
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2 answers

Acceleration of spool on conveyor belt

A spool has a mass of 500 kg and a giration radius of $k_G = 1.30m$. The spool lies on the surface of a conveyor belt, the static coefficient of friction is $\mu_S=0.5$. The spool is not moving at the beginning. Determine: the largest acceleration…
Wim Nevelsteen
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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 ordered a cheaper and "versatile" alternative,…
stardust
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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 equations I'm getting. Firstly, looking at the picture…
Bob Kim
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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 LSB/g ± 6 g: 5460 LSB/g ± 12 g: 2730 LSB/g ± 24 g:…
Franz Kromer
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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 below: And a closeup of 1 of the pivot wheels: The…
J.V.
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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 somewhere else and I will be happy to move…
Liam Lang
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Acceleration of servo motor with AASD-30A

I am using a servo motor 130st-M15015LB with the AASD-30A driver. I have to use the acceleration with position control mode. I can see in the documentation that If I use Pn110 to Pn112, I can have a time of acceleration between 5 to 1750ms, but when…
Leonardo Rafael Mora
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Does more downforce affect the acceleration and top speed?

How can downforce make a race car faster, apart from being faster around corners? I just recently learned that downforce can help a car accelerate from 0-60 mph faster. Usually, I thought drag didn't have a great effect on a car's 0-60 time. I also…
user34865
1
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2 answers

is a positive acceleration indication that velocity must be positive?

the question is clear and straight forward but when i get the velocity it should be ±√2 what i don't understand is the guide answer refusing the -ve value because acc is always +ve thank you in advance
Adham Hussin
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Ride Comfort Estimation using Accelerometers

I've been trying to find established/novel methods for calculating ride comfort using accelerometers and recently I came across this paper which uses ISO 2631 standard to get an objective measure of ride comfort. Upon reading the paper, it…
MajorMajorMajorMajor
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Calculate car acceleration from torque

I have data: mass = 740 kg wheel diameter = 670 mm Rw = 0,335 m power (max?) = 750 horsepower (551kW) Now I would like to calculate car acceleration when throttle is max and speed in this moment = 100 km/h = 27,78 m/s I calculate wheel RPM from…
Mlody87
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