CN2876033Y

CN2876033Y - Lifting machine safety control device based on fault-tolerant control

Info

Publication number: CN2876033Y
Application number: CN 200520085551
Authority: CN
Inventors: 王致杰; 王进野; 谭永海; 杨玉玲
Original assignee: 王致杰
Priority date: 2005-08-03
Filing date: 2005-08-03
Publication date: 2007-03-07
Anticipated expiration: 2015-08-03

Abstract

The utility model discloses a fault-tolerant control-based hoisting machine security controlling apparatus comprising a comparator, a controller, an executor and a speed feedback sensor and characterizing in that a PLC controller is merged in the controlling circuit, the PLC controller has fault-tolerant controlling function, which consists of status-prediction module, fault-diagnosis module and fault-tolerant controlling function module, of which the status-prediction functional module provides the status information to the fault-diagnosis unit; the fault-diagnosis functional module is primarily to perform monitoring, diagnosis and prediction for the fault; the fault-tolerant controlling functional module is to perform compensation, prevention, weakening and elimination for the fault. The utility model has the advantages of that the PLC controller in the apparatus could automatically judge the operation status according to the operation situation of the controlled target, identify the fault and perform fault-tolerant control, thereby enabling the system to stay at the stable and secure operation, to lessen the accident and enhance the controlling precision.

Description

A kind of mine hoist safety control setup based on fault-tolerant control

Technical field

The utility model relates to a kind of mine hoist safety control device for running the engine, especially the mine hoist safety control setup of controlling based on PLC.

Background technology

At present, skyscraper elevator or mine hoist adopt the speed feedback control device mostly both at home and abroad, and it comprises comparator, controller, actr and velocity feedback sensor.Constitute negative feedback closed loop control by the velocity feedback sensor under the normal circumstances, the standard value of comparator is compared with velocity feedback sensor feedback value, and its result sends into controller, is normally moved by actr control elevator or gig.In case this control setup velocity feedback sensor breaks down, its transfer function will change, and become open loop situations, the device stability variation, and control accuracy is low, and the major accident that causes casualties easily can normally move after need are pending.

The utility model purpose

The purpose of this utility model is in order to address the above problem, and a kind of good stability, the mine hoist safety control setup based on fault-tolerant control that control accuracy is high are provided.

For achieving the above object, the utility model is characterized in that in control path and connects a PLC controller except that the comparator that comprises prior art, controller, actr, velocity feedback sensor.The PLC controller is aided with fault-tolerant controllable function, and it is made up of status predication, monitoring, diagnosing and fault-tolerant control function module.Wherein:

The status predication functional module is according to system's service performance, generates different system prediction state vectors constantly in real time, provides status information to failure diagnosis unit.

The fault diagnosis functions module is mainly monitored, is diagnosed and forecast the fault of equipment according to status information, and for fault-tolerant control module provides authentic communication, real-time monitoring, diagnosing result is stored in the data bank, and middle result is constantly refreshed.

Fault-tolerant control function module has certain intelligence effect, can be according to the different sources of trouble and fault signature, take corresponding fault-tolerant measure of control, fault is compensated automatically, suppresses, weakens and eliminates, with the continuous normal operation of assurance system, perhaps guarantee before sensor fault is eliminated, to finish safely earlier a basic stroke.

The beneficial effects of the utility model are, in addition and connect a PLC controller that is aided with fault-tolerant controllable function, constitute negative feedback closed loop control by the velocity feedback sensor under the normal circumstances on existing hoister control device, guarantee that elevator or gig normally move; In case the velocity feedback sensor breaks down and quits work, system has become open loop, then the status predication module of PLC controller can be judged its running state according to the running condition of controlled object automatically, and give fault diagnosis module with information and carry out fault recognition, recognition result is sent into fault-tolerant control module again, according to fault-tolerant control program, reconstitute closed loop control, promptly replace old closed loop, by PLC actr control elevator safety operation, the generation of minimizing accident with new closed loop.

Description of drawings

Fig. 1 is the functional block diagram of an embodiment of the utility model, is example with the elevator among the figure; Fig. 2 is the workflow diagram of PLC controller.

The specific embodiment

As shown in Figure 1, circuit of the present utility model and components and parts structure are, velocity feedback sensor, comparator, controller, actr are connected in series successively and elevator motor constitutes " path ", in addition at comparator input terminal and elevator motor running state information mouth and connect a PLC controller.The PLC controller stores operation procedure, and program comprises status predication, trouble diagnosing, three functional modules of fault-tolerant control.Its operating procedure such as Fig. 2 are described below:

Reset the beginning after, judge whether the gig motor speed is normal, if normally just bring into operation, judge motor operating state by prediction module during mal, discern fault type according to running state by fault diagnosis module, again according to fault type, take the corresponding compensation measure by fault-tolerant control module, the control gig continues operation, judge afterwards whether running state satisfies safety requirements, continue operation if satisfy, otherwise judge, diagnose, take indemnifying measure again, till meeting safety requirements.

Claims

1, a kind of mine hoist safety control setup based on fault-tolerant control, its structure is, be connected in series successively by velocity feedback sensor, comparator, controller, actr and elevator motor, it is characterized in that, at the mouth of the input end of comparator and elevator motor running state information and be connected to the PLC controller that is aided with fault-tolerant controllable function program.