A thermal management system for a space of which the temperature is to be controlled, comprising apparatus to provide a path for circulation of cooling air to the space, apparatus to provide a path for circulation of warming air to the space, and apparatus operable to induce circulation of air in either of the paths and simultaneously prevent gravity circulation of air in the other air.

Disclosed is a method and apparatus for avoiding accessing of defective locations in disks and other storage media. A disk file controller uses manufacturer-provided information about the location of defects to construct a sequentially ordered list of addresses of defective storage locations in the disk, and the list is stored in a table in the disk. During use of the disk, the disk file controller reads the table of defects into its memory and uses it to translate virtual addresses into real ad...

In deep fat frying, the shortening breaks down to be unuseable. The shortening management method and apparatus of this invention evaluates the effect of temperature, time and the kind and amount of product cooked in the deep fat fryer and utilizes look up table means in a computing circuit to signal when the shortening is becoming unuseable.

A low cost, integrated, aircraft fuel management system. A system control unit receives engine variable signals and provides a signal to a motor control unit which thereby controls a variable speed motor. The motor drives a positive displacement pump which delivers and meters fuel to a slinger type turbine engine capable of handling slurry fuels. In a preferred embodiment, compressor discharge pressure (CDP) is supplied to the airframe fuel reservoir thereby pressurizing the fuel supply and mini...

The speed of a vehicle, and particularly a ship, is controlled to minimize the sum of fixed and variable operating costs. The variable costs are incurred substantially only due to fuel usage. The rotational speed and torque parameters of the ship propeller shaft are measured and utilized to derive an expression for shaft horsepower in terms of these parameters. The variable cost function is derived from the horsepower function, fuel factor, unit volume fuel cost and voyage distance for various s...

A power management system is disclosed for an advanced helicopter having h lift and thrust propulsion units and at least one power plant which comprises, a signal generator for generating a first signal which is proportional to the power available from the power plant, a circuit connected to the lift propulsion unit which has an output that varies according to the amount of power used by that propulsion unit and which receives the first signal for generating a second signal which is proportional...

A memory management unit of use in a memory management system. The memory management unit selectively maps a logical address to a respective physical address in accordance with a selected one of a plurality of segment descriptors, each of which defines a logical-to-physical address mapping and a range of address spaces for which such mapping is valid. The mapping is achieved using an improved associative memory circuit. Means are provided to detect mapping conflicts between new segment descripto...

There is disclosed an ACD management information system which tracks attendant work performance without regard to the actual station at which the attendant is operating. The system also monitors non-ACD work states and provides individualized status reports based upon temporarily stored limit criteria. A real time display of system performance is provided to a supervisor in a manner which allows for immediate rearrangement of the system without resort to other data. The displayed data includes s...

A power management system is disclosed for an advanced helicoptor having h lift and thrust propulsion units and at least one power plant which comprises, a signal generator for generating a first signal which is proportional to the power available from the power plant, a power use gage connected to the lift propulsion unit which has an output that varies according to the amount of power used by that propulsion unit and a circuit which is connected to the power use gage and which receives the fir...

A unique memory management system for use with a memory device which is common (or shared) with a plurality of user elements utilizing a memory address counter, scratch pad address memory, external memory address inputs and an address multiplexer.