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HomeAuthorsFriedman, Y. Z.

Friedman, Y. Z.

Petrocontrol, New York, New York

Y. Zak Friedman is a Principal Consultant with Petrocontrol. He has practiced APC for most of his career, specializing in using first-principles models for inferential process control and has developed inferential models to fit many hydrocarbon processes. Dr. Friedman’s experience spans more than 50 yr, working with Exxon Research and Engineering, KBC Advanced Technology and Petrocontrol. He holds a PhD degree from Purdue University.

HP Control: Part 3 – What is advanced process control?

Hydrocarbon Processing / July 2005
Petrocontrol: Friedman, Y. Z.
Process Control

Part 1 discussed what APC attempts to do and how it makes money. Part 2 discussed the structure of modern APC. This part discusses MVPC's small optimizer and the importance of inferential models.. S..

HP Control: Part 2 – What is advanced process control?

Hydrocarbon Processing / June 2005
Petrocontrol: Friedman, Y. Z.
Process Control

Part 1 discussed what APC attempts to do and how it makes money. This part discusses modern APC. Structure of a modern APC application. We now leave the philosophical concepts and go into the struct..

HP Control: Part 1 – What is advanced process control?

Hydrocarbon Processing / May 2005
Petrocontrol: Friedman, Y. Z.
Process Control

A stream of e-mail that followed my January and February editorials1,2 has convinced me that an advanced process control (APC) tutorial would be beneficial. First, a conceptual discussion: What does..

HP Control: HPIn Control: Website provides useful advanced process control information

Hydrocarbon Processing / March 2005
Petrocontrol: Friedman, Y. Z.
Process Control

Following is an interview with Dr. Babak Khosrowshahi, the founder of APC-network.com. What is APC-network and what are its objectives? "APC-network brings together a virtual advanced process contro..

HP Control: More about inferential control models

Hydrocarbon Processing / February 2005
Petrocontrol: Friedman, Y. Z.
Process Control

My friend and colleague, Myke King, wrote an article1 proposing rules for dealing with inferential control models. For the most part, I agree with the arguments, and especially enjoyed the funny illus..

HP Control: Has the advanced process control industry completely collapsed?

Hydrocarbon Processing / January 2005
Petrocontrol: Friedman, Y. Z.
Process Control

I stopped writing   editorials for a while because people were uncomfortable reading them. But I have finally decided against burying my head in sand. We ? control engineers ? should discu..

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