Abstract: A processor for a computerized numerical controller for providing motion planning and interpolation has a first transputer element programmed to convert program data to fixed format binary data and to store converted data in a generated convert data buffer. The convert data buffer is transmitted to a second transputer element programmed to precalculate motion control data therefrom and stores such precalculated data in a generated precalculated data buffer. The precalculated data buffer is transmitted to a third transputer element programmed to interpolate the precalculated data to provide a real time interpolated point stream defining a motion trajectory.

Abstract: A method and apparatus for computerized numerical control of machine tools includes a computer program and a controller for establishing an arbitrary plane with respect to the principal planes for providing cutter radius compensation. The processor precalculates structured data portions of the program that affect motion of the cutter. The precalculated data is stored and, in coordination with other inputs, is utilized to control machine tool servo drives to provide a "determine position loop error" function.

Abstract: A sliding window power demand control system switches loads, of sufficient size and function to cause a significant effect on plant energy consumption, ON and OFF. Loads to be switched are selected by a priority schedule in accordance with a determination made at each sampling instant and based on the projected power at the "next" sampling instant. Projected demand and the intended change in the demand are compared to a deadband in the demand about an assigned demand limit and to a deadband in the power consumed about the assigned demand limit. Load manipulations are thereby minimized.

Abstract: In a power utilization system having loads drawing energy from a utility company, some loads are adjustable and, as part of computerized power demand control system, loads are regulated as well as switched ON or OFF in order to meet an assigned power demand limit. The adjustable loads draw power in accordance with a local supply controller, such as a tap changer, but regulated amounts of power are established by the computer with a set point which is a function of the demand error calculated in an outer loop by the power demand control system and maintained by the computer in a closed loop from an individual power meter and with the established set point. The priority schedule and error computations take into account the amounts of power drawn by adjustable loads as well as the amounts drawn by loads which can be shed, or reconnected.

Abstract: Power demand control on a plant having a plurality of load units of production, each operating between a starting time and an ending time to provide individual production outputs, is exercised by automatically shedding or restoring such load units in order to maintain power demand within an assigned demand limit. The control system provides adaptive priority determination by storing an image of the ON, or OFF, status of the load units into at least two memories (memory I and memory II) on a last ON, first OFF basis for the loads to be shed, and on a last OFF, first ON basis for the loads to be restored. Loads that are ON are stored in a first (ON) memory (memory I); loads that are being held OFF by the controller are stored in a second (DCOFF) memory (memory III). Also provided is a third memory (OFF) (memory II) to store the status of load units which are out of production and under independent control either after ending production or while being made ready to start production.