Need guidance on cradle for adults

Here is an idea.

With "motion on along the bed, across the bed and up and down wave action on the vertical axis", you should consider co-marketing opportunities with the makers of Dramamine. (j/k)

Thanks. I am living in India and I do not understand what you actually meant. Did you mean any firm or company in your country?

Like a motorised hammock?

What will happen to suppress the motor noise?

google 'waterbed'

Do you want them to get seesick? It would be the best approach on soild ground. I think the mentioned drug is against seesickness.

I think the idea is to mimic the motion of a sloop sailing in the condition known as "following seas"

...problems in sleeping and sleeping disorders. I am trying to evolve a system which can give a three dimensional rocking motion to the cradle....

What makes you think such motion will work ? When babies are rocked, it's more of a 2D motion, though maybe that's just because 2D is easier to do. In the womb they have a nice combination of axis to get used to, which may be part of why rocking works. In adults it might be that a 'return to the womb' experience helps, although if that's the case I'd suspect it's a minority. A decent (normal style) bed, and feeling less stressed, would possibly help more people.

I'm not knocking your idea, but can you be more explicit on what kind of movement you want ? Is it rhythmic in all directions, is motion within x⁰ of start position, that kind of thing. Also, if someone gets off to sleep with the thing running, what would it do to their sense of balance in the morning ? You could end up with a complex system very quick. Maybe you could achieve the same ends with some kind of pillow that has a gentle motion, controlled by a timer to slow down and stop. Some kind of insert for a pillow cover that circulates fluid between bladders. You could really go for it, and incorporate valves that make a soothing 'whoosh' sound, a bit like blood flow a baby might hear.

Helo everyone

Thanks at the outset for your participation and replies.

I am a frequent tarveller by train. You can find persons travelling in train fall asleep very soon and have a very sound sleep evn in the midst of the din and noise (back here in India, I am not sure about the trains abroad). Thats what made me to think that I am able to simulate the movement being experinced by a avergae human being lying down in a berth of a train, (its rocking, rolling, jertking, what not) and is able to offer such beds to people suffering from sleep disorders, perhaps they may have more / better sleep. Hope I am right. So what am I basically looking is to stimulate the movement experinced by a perosn in a moving train. Hope I am making myself a bit more clear now about my requirements.

Hi shivvaram,

Thanks for expanding on how you got the idea.

My experience is that I have no problem sleeping on a train, and have often seen others doing so. Most UK journeys are not long enough to bother trying to sleep, though there are exceptions ; The UK has 2 (I think) sleeper-train services, London to Scotland, and London to Cornwall. I can fall asleep quite comfortably on either, though I could do so equally well if I had a seat instead of a bed. Part of the reason may be the rhythmic sound/jolt as the train passes from one length of rail to another.

I'm much clearer on what you intend, though I'd describe it as more of a 2D movement. The UK is fairly flat, though in Scotland there are some long stretches of rail line that are banked as the track worms it's way around mountains. The effect is (to me) nicely relaxing.

Getting what you want sounds expensive, maybe. The first thing that comes to mind is having each leg of the bed mounted on a separate motor;

The drawing below is the nearest I could get. Imagine the swash plate, to left, rotating, and the other bit non-rotating. One is positioned beneath each of 4 bed-legs. It would get ludicrously complex (ball and socket legs) and expensive to keep the bed in place ! Somebody suggested a water bed - it might be better to try that idea, combined with a pump that moves fluid between different sections. Any idea of the market place or cost limit ?

Thanks a lot to everyone who had taken time and pains to think about my idea and give me suggestions. While I was browsing the web, I came across a japanese idea of similar rocking bed, but the only difference was it was designed to give a better level of comfort while making love in bed. (It was a nice idea too). Any how I am still trying with some rudimentary simulations of a 3 D oscillation using hydraulics cyclinders. I shall come back to you soon. Thanks once again to everyone.

I was thinking you could accomplish with a water bed by having a bladder mounted on the inside of a rail. The bladder could be expanded causing a gentle wave action.

You may record train sounds as white noise too.

Kris's idea of motors in the legs may work well also combined with an inclinometer or equivalent for scope. Use of hydraulics may be quieter than motors.