This document discusses control systems and summarizes key concepts from lecture 7: 1) Electronic systems have high input impedance, low output impedance, and high gain due to operational amplifiers. Op-amps provide feedback and different impedance terms in example circuits. 2) Electrical and mechanical systems can be combined. Lorentz force and Faraday's law relate current, magnetic fields, and motion in devices like DC servomotors. 3) Transfer functions describe the input-output behavior of electrical, mechanical, and combined electro-mechanical systems. The overall transfer function is derived by substituting Lorentz and Faraday equations into the individual system transfer functions.

1. ME 330 Control Systems SP 2011 Lecture 7