Automatic working platform vertical-lifting device and control method thereof

Abstract

The invention discloses an automatic working platform vertical-lifting device and a control method thereof. The automatic working platform vertical-lifting device comprises an interaction display unit, a controller, a boom state monitoring unit and an executing mechanism, wherein the interaction display unit is used for inputting ascending or descending distance parameters of a working platform and transmitting the distance parameters to the controller, and is capable of displaying boom states in real time; the boom state monitoring unit is used for monitoring length and angle information of a boom and transmitting the length and angle information to the controller; and the controller automatically starts ascending or descending action according to the distance parameters and controls the executing mechanism to drive a boom structure to complete the corresponding action through a hydraulic executing element. Amplitude errors and the amplitude error changing rate are calculated in real time, extensible valve current is obtained by inquiring a fuzzy control rule table, it is guaranteed that the amplitude change in the lifting process is as small as possible, and control precision is improved; and the boom is controlled to vertically ascend and descend through a method that an amplitude change valve current value is kept constant and an extensible valve current value is adjusted, the control quantity is reduced, and rescue work efficiency is improved.

Description

technical field [0001] The invention relates to an automatic vertical lifting motion device and a control method for a working platform of a ladder fire truck, through which the working platform of a ladder fire truck can be automatically vertically raised or lowered to a certain height, and belongs to the technical field of engineering machinery. Background technique [0002] Aerial ladder fire trucks are widely used in fire scene rescue. During the rescue process, it is easy to encounter situations where the working platform is close to the vertical rescue plane of tall buildings but lower or higher than the rescue position. In this case, it is necessary for the operator to reach the rescue position through repeated amplitude adjustment and telescopic adjustment based on experience. There are two problems in the operation process: the working platform is close to the wall, and the telescopic and luffing movement of the boom is prone to collision accidents; the manual contr...

AI Technical Summary

Problems solved by technology

There are two problems in the operation process: the working platform is close to the wall, and the telescopic and luffing movement of the boom is prone to collision accidents; the manual control of the working platform to reach the rescue position requires repeated operations, which reduces the rescue efficiency

The existing technology has the following defects: 1. It can realize the vertical lifting of the working platform, but in the process of vertical lifting, it is necessary to control the current of the luffing valve and the telescopic valve according to the change of the amplitude error, the control amount is large, and it is not easy to operate

2. The expansion and luffing actions are only controlled by the amplitude error change, ignoring the influence of the amplitude error change rate, which increases the possibility of amplitude deviation during the vertical lifting process; 3. The operator is in the process of vertical lifting of the working platform , due to the uncertainty of human subjective judgment, repeated operations may be required to reach the designated position, which greatly affects the rescue efficiency

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