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A technology for fault detection and heavy-duty locomotives, applied in instruments, simulators, control/regulation systems, etc., and can solve problems such as single influencing factor and slow calculation speed
Inactive Publication Date: 2017-09-29
HUNAN UNIV OF TECH
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However, these models consider relatively single influencing factors, and the calculation speed is relatively slow.
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Embodiment 1
[0088] Such as figure 1 As shown, according to the adhesive characteristic curve, there is dμ / dv on the left side of the peak point, that is, the stable region s >0, on the right side of the peak point, that is, there is dμ / dv in the idle zone s s The symbol of the locomotive makes it difficult to obtain the running status of the locomotive; the following formula, The notation for is not equivalent to Therefore, although μ characterizes the situation of wheel-rail surface adhesion utilization, it cannot utilize To identify the running condition of the wheelset.
[0089]
[0090] According to the change of traction and the speed of locomotive body is unknown, the methods of locomotive idling detection are discussed respectively.
[0091] (1)T m change, the traction force of the locomotive changes at this time,
[0092] a. which is As the output torque of the locomotive increases, the creep speed increases and the adhesion coefficient increases, indicating that t...
Embodiment 2
[0106] Combined with the simulation experiment, the application effect of the present invention is described in detail.
[0107] Aiming at the detection of multi-stage idling faults of wheel sets, a single-axis machinesimulation model is established by Matlab / Simulink for verification.
[0108] Simulation 1, such as image 3 As shown, the initial value of the input torque is 0, and then increases in the range of 2000N·m / s, from Figure 4 It can be seen that the coefficient of adhesion increases before 4.2s and decreases after 4.2s. Figure 6 As shown in the judgment diagram, 1 is idling and 0 is stable. At 4.2s, when switching from 0 to 1, the locomotive is idling microscopically, and then the locomotive is idling slowly, and the adhesion coefficient decreases. and Figure 5 The angular acceleration judgment diagram also shows that the car has been idling rapidly at 4.3s.
[0109] Simulation 2, such as Figure 7 The input torque is shown, the initial value is 8000N·m, and...
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Abstract
The invention discloses a heavy-duty locomotive multistage idling fault detection method comprising the following steps that firstly the idling fault is graded according to different idling phenomena; and then the locomotive idling fault is detected and classified by analyzing a wheel / rail surface adhesion feature curve according to the locomotive operation work state by using the combination method of the wheel diagonal acceleration, the traction moment derivative and the adhesion coefficient derivative. The adhesion coefficient derivative is used as the criterion so as to have the prejudging function for idling operation; multistage fault detection is performed on idling operation of the locomotive wheelset so as to guide multistage adjustment of the locomotive adhesion system for the traction torque; and using the locomotive body speed signal is avoided so that the reliability of the algorithm can be greatly enhanced. Besides, the algorithm is simple in structure and easy to implement, and the effectiveness of the detection method can be verified through simulation.
Description
technical field [0001] The invention belongs to the technical field of heavy-duty locomotives, in particular to a method for detecting multi-stage idling faults of heavy-duty locomotives. Background technique [0002] In the study of heavy-duty locomotive transportation, the forward power of the locomotive depends on the adhesion force on the contact surface between the moving wheel and the rail. The generation of adhesion requires the adhesion between the wheels and rails. Due to the influence of rain, snow and other natural environments, when the traction force of the locomotive is greater than the maximum adhesion provided by the wheel-rail surface, the adhesion state between the wheels and rails will be destroyed. , the wheel set loses part or all of its traction and idling, and the locomotive also changes from stable operation to unstable operation. [0003] The classification of idling faults is the premise of realizing multi-level sticking control of locomotives. Wh...
Claims
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