Active Suspension System by Fuzzy Controller

You're going to have to flesh out your design a little before the type of sensors can be determined....I suggest you do a little reading here and come up with a rough outline of the design you are considering...

Active control suspension systems....

You have a long road ahead. You are asking us to design your system for you.

What will you learn, except how to ask others to do your work for you.

You need to do the basic research to find the proper sensor for the task.

Measuring the "width and height of road unevenness surface" will not give you ride control. Ride control is not predictive but reactive.

You need to study sensors so that when you do design your system YOU can select the proper control mechanisms.

How do I choose the right sensor? « SensorTech

"What will you learn, except how to ask others to do your work for you."

Maybe that's how people from third world countries succeed, by learning how to get others to do their work for them. It's called "delegation". When you don't know the answer, delegate it to someone who does know and take credit for it.

Normally wheels will follow the ground contours. The more they move the bumpier the road is.

If the vehicle is wedged in place then the road is narrower than the vehicle.

That should get you started.

I think this is being very unfair to the OP, whose command of the English language is limited. I'm sure he is not referring to the width of the road but to the wavelength (and amplitude) of the irregularities in the road. The whole point of suspension design is that wheels do not necessarily follow the road surface.
I am not qualified to comment authoritatlively, but it seems to me that active suspension is theoretically preferable to passive suspension. Active suspensions demand sensors and controllers. If fuzzy logic can be employed in washing machine controllers then I see no reason why it should not be appropriate for an active suspension system controller.
I will, however, agree that it is surprising that a graduate engineer is having difficulty selecting his own sensors.

The whole point of suspension design is that wheels do not necessarily follow the road surface. ??

The point of suspension design is to make sure that the wheels do stay in contact with the road surface.

Interesting interpretation on width you've made there.

How active does OP want to go?

I think we are actually in agreement here. Suspension designers recognise that the wheel should always remain in contact with the ground, but also that in the real world this is not always the case.
As for my interpretation of width, perhaps one should puntuate the OP's question as
which sensors i have to use for measurement of (width and height) of (road unevenness surface) ?

Why the fuzzy controller? It simply makes your work that much harder. You cannot define fuzzy in simple terms needed. If it is a "learning" fuzzy, you tripled the problems you are facing to no benefit. I suggest, you rethink, and simplify.