Microprocessor Control of a Vapor-Cycle Cooling System

A dual microprocessor-based system controller was developed for aircraft environmental control system (ECS) applications. The controller interfaces with all system sensors and actuators, and software process control algorithms maximize system efficiency. Flexibility is built into the design of the controller to enable configuration for a single or dual-evaporator system simply by fitting different programmable memory devices. Existing component technologies were used to minimize hardware cost.