Posted by admin | Posted in dog supplies | Posted on 26-03-2010
Tags: dog, dog ramp steps, dog_steps, pet, pet studio ramp steps, ramp, wishlist
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Ramp Steps
Wheelchair Ramps – Choosing the right Wheelchair & Scooter Ramp from Health and Care
Wheelchair and scooter ramps are essential in making a building easily accessible and it is important to choose the correct one for your requirements. Whether it is for domestic or commercial use there are plenty of wheelchair and scooter ramps to choose from. Ramps can be used to load wheelchairs or scooters into vehicles, put over steps to create a smooth transition and over a door’s threshold to enable easy access. Wheelchair ramps can be portable, foldable or with a rail to offer additional support for those who can not walk unaided. Below you will find a complete guide to choosing the right wheelchair and scooter ramp for your home or commercial premises.
Threshold Wheelchair and Scooter Ramps
Threshold ramps are essential ramps for both domestic and commercial use. A threshold ramps purpose is to create a ‘bridge over a threshold’ for a wheelchair or scooter to roll over. A common threshold would be a door frame or door step to get from outside a building to inside. Threshold wheelchair and scooter ramps come in a range of sizes and can be made from a number of different materials including aluminium and fibreglass. A threshold wheelchair and scooter ramp can be a simple bridge up to a step so the wheelchair or scooter can bridge the distance from the ground to the step. Another choice of wheelchair and scooter threshold ramp is a ramp which runs over a door hinge so the wheelchair or scooter can run smoothly over the hinge into another room. Finally the most flexible kind of Threshold wheelchair and scooter ramp is a channel ramp. These can comprise of both folding and telescopic features making it an easily stored ramp and a ramp that can extend to fit specific building requirements.
Wheelchair and Scooter Vehicle Loading Ramps
These ramps can be used to move a wheelchair or scooter from the ground and into a vehicle. They can also be used to transport wheelchairs up or down steps or over curbs. A vehicle loading ramp tends to be quite long or ‘telescopic’, meaning that it is extendable lengthways. Many vehicle loading ramps tend to be foldable and lightweight so the ramp can be stored in the vehicle along with the wheelchair or scooter. The ramps are normally slip resistant to maintain good traction even in wet conditions. Vehicle loading ramps can be either on wide ramp or two narrower channels known as a channel ramp. Both are wide enough to fit wheelchairs and scooters.
Access Ramps
Access ramps create an easy access point up to a building for wheelchairs, scooters and for those who are unable to walk up steps unaided. These ramps are normally found on commercial premises, schools, hospitals and nursing homes. Access ramps come in a range of sizes to suit a particular building’s requirements. Access ramps are available with or without hand rails.
Whatever kind of ramp you need, Health and Care have a complete range of Wheelchair and Scooter Threshold Ramps, Vehicle Loading Ramps and Access Ramps. Visit http://www.healthandcare.co.uk/Ramps.html to see the full range.
About the Author
Laplace transform of step and ramp functions?
Hello,
I've been doing a bit of self-study for my next semester's engineering courses, and I've run into a bit of a problem. The question states that I must find the laplace transform of the given function, and I can do that just fine if either the step or ramp functions are within their own components, but when they are multiplied together? I'm not sure what that means and how to approach it.
The question:
f3(t) = 4r(t)u(1-t)
The answer is supposed to be 4 * ( 1/s^2 - (e^-s)/s^2 - (e^-s)/s )
Why are there three terms? Any help would be appreciated.
The cut and dry answer to your question is.
Step = 1/s
Ramp = 1/s^2
but something looks odd in the equations.
1, Why "f3(t)... " are there f1, f2, etc.?
2. u(t-1) looks like a 'difference', not differential eqn.
The way you go about solving this is, you have to come up with the system transfer function - which I do not see here. So, you have to derive it somehow from f3.
The u(t) usually refers to an input, while r(t) to the response, which in the Laplace domain would be R(s)/U(s)
A transfer function is equal to the relation between an input and an output, and should look something like
R(s)/U(s) = (As^n+...+ns^0) / as^p+....+ps^0
To obtain R(s), you multiply the above xfr function by U(s), which would be 1/s for a step input, or 1/s^2 for a ramp input.
.
DiRT3 - At The Ramp's End (Read Description for steps!)