PID Controller for Application

[Lachlan_G]

I am looking for a product that can function as a PID controller in a control loop with non-linear elements, implementing overall uniform gain. Most commercial generic PID controllers work with constant gain across the full set-point range. When combined with a non-linear control element this leads to an overall non-uniform gain. The bandwidth of the PID controller should be >10kHz, it should have multiple channels, and ideally would be able to handle crosstalk between the channels.



As this will be its only function, products with simplistic configuration and implementation are preferred (e.g. over a bare-bones FPGA). Also possible would be a DSP solution that compensates the non-linearity in the loop, so that a generic linear PID can be used.



Please let me know if you know of any device that matches this description, or have experience with this kind of problem.



Thank you