Designing Vehicle Payload Isolator System: Help Needed

[cstoos]

I am trying to design a small isolator system for a vehicle payload. I want to run it through a sine-on-random and a random-on-random input to try and optimize the design, but I am having trouble finding exactly what to use for the input functions. I assume it is more involved than typing random amplitudes and frequencies.

If anyone can point me in the right direction I would appreciate it.

Also, this is not any sort of analog simulation (I came across three of those in my search before posting this), just a Matlab simulation. Thanks.

 

[Navin A S]

The best way to design a small isolator system for a vehicle payload is to use a combination of sine-on-random and random-on-random input functions. For sine-on-random input functions, you need to specify the amplitude and frequency of the sine wave, as well as the statistics of the random process, such as the mean and standard deviation. For random-on-random input functions, you need to specify the statistics of both the base random process and the random disturbance. The base random process should have a spectrum that matches the expected spectrum of the payload vibration. The random disturbance should have a spectrum that reflects the expected disturbance from the environment in which the payload will be operating. Using Matlab, you can use the random signal generator blocks or the Sine Wave Generator block to generate your input functions. You can also use the control system blocks to model the isolator system. Once you have your model set up, you can then use the simulation tools to run the model with different input functions and parameters and measure the performance of the system. This will help you identify the optimal design for your isolator system.