# Questions tagged [acceleration]

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29 views

### How do I find the optimal/best Gear ratios for an 3-speed transmission of an RC car?

[was told to post here, from physics stackexchange] Says it in the title - I've done a bunch of stuff so far, but my work seems to be wrong. I'm trying to build an RC car (pretty small, about 25 cm in ...
46 views

I am unsure how I would solve this. I have tried to solve it and got -29.1 but my attempt was wrong. Could someone please lead me in the right direction or show me the way to solve this? Thank you.
28 views

### Unwinding a spool that does not slip on a conveyor belt

thank you for taking a look at this problem, as I do not want to plagiarize the textbook I am using I will break down the problem, state the textbook's final solution values, and my question about ...
1 vote
76 views

### 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 ...
31 views

### Verification of Accelerometer offset calculations occurring due to placement of Accelerometer away from centre of rotation in a rigid body

I have evaluated the Accelerometer offset occurring due to placement of Accelerometer away from the centre of rotation of body. In the below evaluation I am trying to calculate Accelerometer's reading ...
28 views

### Calculation of Accelerometer offset for Placement of Inertial measurement unit away from centre of mass

I am working on a 6DOF IMU that contains a 3 axis accelerometer and a 3 axis gyroscope, I am building a project to plot the position and orientation of a vehicle/dirt bike in a 3d plane, However the ...
39 views

### Center of gravity offset for accelerometer and gyroscope readings

I am working on a 6DOF IMU that contains a 3 Axis Accelerometer and a 3 Axis Gyroscope. I am building a project to plot the postion and orientation of the turret/cabin in a crane in 3D space. The IMU ...
276 views

### Understanding data received from sensor (Twos complement)

So I use accelerometer to get acceleration data. However, I have trouble understanding data. I have been reading manual, but it does not help me: ...
226 views

### Is the effect of weight-to-horsepower ratio linear?

I am wondering if a car that weighs 2,5kg and a engine power output of 1hp would be just as fast when going in a straight line like a 1250kg car with 500hp (they both would have a weight-to-horsepower ...
44 views

### Is there a way to simulate the drag effect created by acceleration while in a stationary object?

There was a video of a train that had tvs in the windows so it appeared the rider was moving across the landscape. If the train was stationary the passenger would not believe the ride was real because ...
52 views

### Spinning disc stress distribution

For a thin spinning disc, is the boundary condition on the outer surface that the radial stress is zero? If so, how is this consistent with the fact that the outer surface of the disc has a ...
291 views

### Inverse Power Law for Accelerated Failure Times

I am working with some subsea cable data. I have $n$ samples that are split into three groups (sized $n_1$, $n_2$ and $n_3$). Each group goes through a different acceleration process until failure. ...
266 views

### Flywheel effect on Engine speed

Do crankshaft rotate at constant speed in an IC engine for a given RPM after application of flywheel? If not, then how do we get constant speed at vehicle wheel?
163 views

### Inertial Force expression in spring

Let there be a spring as shown. And this is stretched to point C and released, then force exerted by spring on mass in region X2 is "- kx" . But This springs gains kinetic energy at mean ...
713 views

### Obtain velocity by using accelerometer data

I have an accelerometer sensor, which obviously measures acceleration along the $x$, $y,$ and $z$ axes.What I would like to do is to obtain the velocity along these axes by using the accelerometer ...
507 views

### How does gearing affect top speed and acceleration exactly [duplicate]

I was just reading an article about "What affects a car's overall top speed" and it left me wondering how gearing affects top speed and acceleration. While I did manage to learn how ...
1 vote
2k views

### 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 ... 376 views

### If every action has an equal but opposite reaction, then how is acceleration possible?

Newton's thrid law states that "For every action, there must be an equal but opposite reaction". For example, if I push on a table, then the table won't move until I push table hard enough ...
151 views

### 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 ...
1 vote
223 views

### 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 ...
158 views

### Effect of centripetal acceleration on angular acceleration

$a_t$ = $\frac{dv}{dt}$ = $\frac{d(r*\omega)}{dt}$ = $r$* $\alpha$. $a_c$ = r*$\omega^2$ = $\frac{v^2}{r}$ These are almost all the variables and values associated with centripetal and tangential ...
109 views

### How to get the normal acceleration

For the problem below, I tried solving it, but I don't know where I should get the value of normal acceleration, guess I was lost. And here's what I solved so far
1 vote
71 views

### 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 ...
98 views

### How to solve this Question regarding compound accelerations

So , I was trying to solve it. Then , I notice that acc of 2kg mass has 2effects. One acc from the force to left and one from the Question , it says acceleration to be up. Then , the 2kg mass would go ...
98 views

### Are there offsets in these accelerometers signals?

How you can see in the picture below, there are 3 signals from 3 piezo accelerometers placed on a oscillating 3D structure. The structure should vibrate only along the z axis (blue track), but there ...
75 views

### Why are the two acceleration considered as a1 and a2 here and find acceleration of 6kg mass?

Why are the two acceleration considered as a1 and a2 here? What is the reason for this even though the tension of both the strings are same. T is equal to 5gTcos 53 for left side and 5gTcos37 for the ...
247 views

### how can i find Spectral Acceleration (Sa(T1; 5%))?

I want to do incremental dynamic analysis (IDA) for my project and for hunt and fill algorithm i need the 5% damped Spectral Acceleration at the structure’s first-mode period (Sa(T1; 5%)) . Can i find ...
31 views

### Vibration measurement of rotating blade

In a vibration measurement of a rotating blade, I have the following information. The vibration signal is measured using an ICP accelerometer which has the following specification Measurement range: ...
363 views

### How to convert gyro data to extrinsic/global/world euler xyz angles?

I know that I can get gyro angles by integration, but that are not the angles I need. I need the same angles that I calculate from the accelerometer (extrinsic euler xyz angles) to apply properly a ...
45 views

### Can a mouse use acceleration to track movement?

Would it be technologically possible to use mouse momentum measurements to move a cursor on screen instead of the classic laser technology, without losing precision? This would for example allow ...
352 views

### 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 ...
68 views

### Euler rotations and acceleration

I have a system determined by 3 Euler angles that describe the orientation with respect to a fixed coordinate system XYZ. The angular velocities are: $\omega_2$ (precession), $\omega_1$ (nutation) and ...
62 views

### How come my calculated engine torque is so much less than the manufacturer's specifications?

Here are my calculations. Am I doing anything wrong?
1 vote
988 views

### 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 ...
30 views

### How to design a method to estimate vx=speed in direction of swimming

We have a body that goes underwater (let's say a whale) with magnetometer and accelerometer data. I also have GPS, date, depth, pressure and temperature data. I want to know if there is any simple way ...
37 views

### Construct "Modal Coordinates Time History" from transfer function and test accel-time data

I have a query regarding the calculation of the so called “Modal Participation Factor time signal” from a combination of a) transfer functions (amplitude and phase for each eigenmode) obtained from "...
71 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 ...
1 vote
98 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 ...
1 vote
38 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. ...
257 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 ...
207 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 ...
40 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.
268 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 ...
159 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 ...
2k 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 ...
100 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 ...
2k 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 ...
107 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/...