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1420 results about "Change control" patented technology

Change control within quality management systems (QMS) and information technology (IT) systems is a process—either formal or informal—used to ensure that changes to a product or system are introduced in a controlled and coordinated manner. It reduces the possibility that unnecessary changes will be introduced to a system without forethought, introducing faults into the system or undoing changes made by other users of software. The goals of a change control procedure usually include minimal disruption to services, reduction in back-out activities, and cost-effective utilization of resources involved in implementing change.

Battery pack quick-changing control system for electric automobile

The invention discloses a battery pack quick-changing control system for an electric automobile. The battery pack quick-changing control system for the electric automobile comprises a battery pack quick-changing device, a battery manager, a first Hall sensor, a first quick-changing effective sensor, a second quick-changing effective sensor and an automobile controller, wherein the battery pack quick-changing device comprises a battery pack locking mechanism and a tray ejecting mechanism; the automobile controller is respectively connected with the first Hall sensor and the first quick-changing effective sensor so as to obtain a battery pack quick-changing signal and a battery pack locking signal; the automobile controller also communicates with the battery manager; and the automobile controller is used for generating a corresponding control instruction according to the battery pack quick-changing signal, the battery pack locking signal and state information of the electric automobile and transmitting the corresponding control instruction to the battery manager so as to control high voltage power-on or power-off of the electric automobile so that the battery pack quick-changing process is controlled. Through the adoption of the battery pack quick-changing control system for the electric automobile, disclosed by the invention, the battery quick-changing process is monitored and the whole changing process is automatic, the efficiency and safety in the battery pack quick-changing process are improved.
Owner:BEIJING ELECTRIC VEHICLE

Intelligent vehicle lane changing control method based on hazard analysis

The invention discloses an intelligent vehicle lane changing control method based on hazard analysis. A sensing unit is used for sensing the driving environment and operation state information, and a decision-making unit judges whether a vehicle needs to change lanes or not according to the collected information; when the current road condition meets the lane changing requirement, the decision-making unit plans a driving path, the planed path is subjected to hazard analysis through simulating calculation, the driving path is adjusted and modified according to hazard analysis results, and the lane changing action can be given up when hazards are too large; after the driving path is determined, a control unit controls the vehicle to achieve the lane changing action; when the current road condition does not meet the lane changing requirement, due to emergency conditions of roads ahead, the vehicle needs to change the lanes emergently; and hazard analysis still needs to be conducted when the vehicle changes the lanes emergently, and the control unit controls the vehicle to act according to analysis results. In the vehicle lane changing process, through the hazard analysis, the lane changing action can be achieved safely and efficiently, and the driving safety and stability of the intelligent vehicle are improved.
Owner:JIANGSU UNIV

Vehicle lane changing control method and system

The invention discloses a vehicle lane changing control method and system, and belongs to the field of vehicle safety. The method comprises the steps that the distance datum of a vehicle about to change a lane is obtained and is the distance between the vehicle and a barrier which is located behind the vehicle and is closest to the vehicle, and the barrier is located in a lane which the vehicle is to go into; whether the distance datum is smaller than a bumping distance threshold value or not is judged; if the distance datum is smaller than the bumping distance threshold value, whether the vehicle is located in a dangerous zone or not is judged, and the dangerous zone is the zone that distance between the zone and the central line of the lane where the vehicle is located currently exceeds a preset distance threshold value; and if the vehicle is located in the dangerous zone, the vehicle is controlled to run in the direction away from the lane which the vehicle is to go into. The vehicle lane changing control method system provided by the invention is used for controlling the vehicle about to change the lane so that the vehicle can eliminate dangerous conditions by itself when bumping danger is about to happen to the vehicle about to change the lane during lane changing, and therefore the potential safety hazards of the vehicle in the lane changing process are removed.
Owner:WUHU LION AUTOMOTIVE TECH CO LTD

Intelligent appliance system and intelligent appliance control method

The invention provides an intelligent appliance system and method. The intelligent appliance system comprises an appliance body, sensing equipment, a cloud server, a controller and a mobile terminal, the sensing equipment is connected with the cloud server, the controller is connected with the appliance body and connected with the Internet to be connected with the cloud server to receive control instructions to turn on and off an appliance, adjust temperature and humidity of the appliance, change control mode of the appliance and increase or decrease volume or brightness of the appliance, the mobile terminal is connected with the cloud server through the Internet, and the appliance is controlled by displaying running information of the appliance on a display screen or directly sending the control instructions. The intelligent appliance is controlled automatically through analysis and intelligent operation according to running state information of the appliance and information of environment surrounding the appliance without artificial participation and control, the intelligent appliance can automatic adjust state according to surrounding environment, and all operations are automatically completed, so that true intelligent control is realized, and more comfortability is brought to a user.
Owner:HANGZHOU HEZHI ELECTRONICS TECH

Rotational speed and torque control device and method of wind turbine generator set

ActiveCN102635499AEasy to implement flexible switchingReduce speedWind motor controlMachines/enginesConstant powerAngular degrees
The invention discloses a rotational speed and torque control method of a wind turbine generator set. Under the situation that the measured rotational speed of a power generator is higher than the rated rotational speed and the measured power exceeds the rated power, the torque is switched from a PI (proportional-integral) control way to a constant power control way; under the situation that the pitch angle is smaller than the optimal pitch angle and the measured rotational speed is lowered below the rated rotational speed, the toque is converted from the constant power control way to the PI control way; and the pitch angle is controlled in a PI control parameter non-linear adjustment way, and the pitch control is in an activated state within the whole normal working rotational speed range. According to the rotational speed and torque control method of the wind turbine generator set provided by the invention, the problem of greater fluctuation in the rotational speed caused by desynchrony of the two types of control can be avoided by changing control target points of two controllers in a transition region, the transition region is improved from the original points to a curve, the flexible switching of the control states is easier to realize, and the stability in operation of the unit and the power output of the unit can be ensured.
Owner:CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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