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155 results about "Alternative control" patented technology

Multi-connected air-conditioning unit control method

The invention discloses a multi-connected air-conditioning unit control method. A multi-connected air-conditioning unit comprises an air-conditioner main unit consisting of more than two outdoor units in parallel connection and an indoor unit, and the outdoor units include a main unit outdoor unit and an auxiliary unit outdoor unit which is used for precisely controlling power output of the outdoor units according to practical power requirements of the indoor unit. Alternation of the outdoor units and variable-frequency compressors of the outdoor units is complete by steps: firstly, judging whether system load Q is smaller than a set capacity Q2; secondly, judging whether the system load Q is larger than a set capacity Q1; and thirdly, judging whether the system load Q is larger than the set capacity Q2 and smaller than the set capacity Q1. By means of alternative control of full-variable-frequency compressors and automatic alternative control of the outdoor units, the outdoor units and the variable-frequency compressors of the outdoor units can be alternatively used while power output of the outdoor units is precisely controlled according to the practical power requirements of the indoor unit within a certain range of the system load, and thereby service lives of the multi-connected air-conditioning unit and the outdoor units are prolonged without adding any extra equipment.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD

Highway and city expressway connection part traffic coordination control system

The invention relates to a highway and city expressway connection part traffic coordination control system which comprises a traffic flow detector, a traffic signal control machine, a traffic information display screen, and a traffic coordination control machine which are arranged at a highway and city expressway connection part. The traffic signal control machine carries out alternative controlling on the traffic lights of each entrance according to traffic flow detection data and a traffic coordination control machine instruction, the distributed control of the traffic flow in time is realized. The traffic information display screen carries out corresponding prompt displaying according to the traffic coordination control machine instruction, and the traffic diversion control of the traffic flow in space is realized. The traffic coordination control machine receives a highway monitoring center instruction through a wireless network, dynamically optimizes and gives a traffic signal control instruction and a traffic information display instruction and issues the instructions to the traffic signal control machine and the traffic information display screen through a wired network to carry out traffic coordination control.
Owner:TRAFFIC MANAGEMENT RES INST OF THE MIN OF PUBLIC SECURITY

Intelligent controller of electric furnace electrode

The invention relates to an intelligent controller of an electric furnace electrode. A plurality of digital/analog input and output channel modules are spliced with a single-board computer, and exterior terminals of the modules are connected with an electric furnace electrode unlocking operation switch, an elevating operation switch, a control valve of a locking device, a control valve of an elevating device, an upper and a lower space-limiting switches of a furnace cover, a manual/automatic switching switch, a current and voltage detection end, a current setting potentiometer, a transformer reactor shift and a fault comprehensive signal of an electric furnace control system. The electrode adjusting calculation method consists of an automatic arcing algorithm of equal arcing distance, a window current integrator overcurrent control algorithm, and a near reverse internal model control method based on a LSSVM-NARMA model. The electrode adjusting algorithm also comprises a PID control method, provides modeling data for the reverse internal model control method, is an alternative control method, and has the characteristic of quick and accurate electrode adjustment. The invention can significantly shorten the smelting period, save the electric energy, reduce the energy consumption, and is suitable for organizations of electric furnace smelting, and the like.
Owner:NORTHEASTERN UNIV

Quantitative noise leakage control method and apparatus

The invention relates to a device for controlling quantizing noise leakage in the technical field of communications, comprising a transient signal detecting unit and an alternative control unit, wherein, the transient signal detecting unit is used for dividing a currently input frame signal into a plurality of subframes, calculating a maximum amplitude value of each subframe and adopting the ratio of the maximum amplitude value of each subframe and the sum of the maximum amplitude values of adjacent subframes of the individual subframe as a transient detection function; the ratio is judged, if the ratio is more than a certain threshold value, then the transient signal is detected, if not, the transient signal is not detected and a transient signal detection result is transmitted; the alternative control unit is used for receiving the transient signal detection result and choosing different branch routes for encoding processing regarding different signals. The invention also provides a method for controlling quantizing noise leakage and solves the problems in the existing proposal for controlling quantizing noise leakage that the computational complexity is high, the time delay is long, the encoding efficiency is low and the occupied resources are more.
Owner:HUAWEI TECH CO LTD
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