JPS6341778B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control system for a brake device with a digital electric command type load variable device.

With the recent introduction of automatic train driving systems, fine-grained brake control has become necessary to perform fixed-point stopping control.

The conventional digital electric command type brake system is the first
A command is issued from the brake controller as shown in the figure. In order to effectively use electric brakes such as regenerative brakes, when subtracting the electric brake force from the command brake force using an electrical quantity, conventionally, as shown in Figure 2, the electric brake force is output from the brake controller or automatic driving device. . A brake force command amount B _P is generated from the brake commands SB _{1 to SB 3} by a brake command amount generation circuit 1 . On the other hand, the amount of electric brake actually applied
The air brake command amount Ba was created by subtracting Be from the brake force command amount B _P. A method has been considered in which the air brake force command quantity Ba is calculated by the A/D converter 2 (analog quantity-digital quantity converter) and then _SB1 ' to _SB3 ' are passed to the air brake apparatus 3 as digital air brake commands. There is. At this time, when the total number of brake steps is 7, the relationship between the command steps and the air brake force normally increases stepwise at equal intervals as shown in FIG. However, in this case, if the steps are the same, the braking force is the same when the car is empty and when the car is full, so it is necessary to increase the number of command bits for the air brake in order to issue detailed brake commands for automatic driving, etc. However, increasing the number of command bits involves many problems such as increasing the number of lead-through lines and complicating the structure of the air brake device, making it impractical. Furthermore, as an example of using only an air brake without using an electric brake, there is a
A brake system that generates braking force according to the variable load signal as shown in the figure has been realized. However, it is clear that such a brake conversion device that does not use an electric brake is uneconomical and has no practical effect.

The present invention provides a divider that divides the air brake force command amount by the variable load signal on the input side of the AD converter, and also uses an air brake device that provides different braking forces depending on the variable load signal. This enables detailed brake control using variable load signals without increasing the number of command bits in the brake device.

Ideally, the braking force for a commanded step should be different depending on whether the vehicle is full or empty. Regarding the air brake device with variable load device, please refer to the 4th section as mentioned above.
Products with the characteristics shown in the figure have already been put into practical use.
An embodiment of the present invention using this air brake device is shown in FIG. In the figure, 1 and 2 indicate the same items as in FIG. 4 is air brake force command amount Ba
The digital air brake commands SB ₁ ′ to SB ₃ ′ are input to the divider 5, which divides the air brake force by the variable load signal _WP , and the output air brake force is determined by the variable load signal _WP as shown in Fig. 4. Showing different air brake devices. The steps in FIG. 5 up to the calculation of the air brake force command amount Ba are the same as those in the conventional embodiment shown in FIG. 2. Therefore, the air brake force command amount Ba is based on the value multiplied by the variable load signal Wp. However, by dividing the air brake force command amount Ba by the variable load signal W _P , the divider output becomes the same value when the vehicle is experiencing the same deceleration. In other words, as shown in Fig. 6, even if the air brake force command amount Ba is different from V _F when the car is full and V _E when the car is empty, by dividing by the variable load signal, the output of the divider, the digital air brake command SB ₁ ' to SB ₃ ' are all the same four-step command. In other words, the air brake force command amount Ba, which varies depending on the variable load, is determined by the variable load signal Wp.
By dividing by , it is converted into a signal corresponding to the number of steps. Therefore, the air brake device 5
Digital air brake command input to
SB ₁ ' to SB ₃ ' are, for example, 3 bits corresponding to the number of steps 7.

On the other hand, in the air brake device 5, the variable load signal
Since different braking forces are produced at the same step depending on W _P , together with the divider 4, the air braking force at the same step varies depending on whether the train is full or empty, allowing fine-grained brake control according to the load conditions of the train. becomes possible. In this case as well, the electric brake has priority, so it can be used effectively, and the air brake makes up for the shortfall, which is a big advantage from the perspective of energy usage. By providing the divider 4 in this manner, the air brake device 5 with variable load device can be applied to a brake control device that uses both an electric brake and an air brake. Therefore, fine brake control is possible without increasing the number of command bits.

As described above, according to the present invention, when using an air brake device with a variable load device, by calculating and then dividing the air brake force command amount, the air brake command SB ₁ '~ is determined depending on whether the car is full or empty. Since SB ₃ ′ does not differ, air brake force characteristics can be obtained depending on the load conditions at that time, allowing fine-grained brake control and improving fixed-point stopping accuracy in automatic driving.

For convenience of explanation, the number of brake command bits is 3.
Although it was explained in , the same application is possible with other numbers of bits.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an example of a brake controller circuit, Fig. 2 is a control block diagram of a conventional brake control device, Fig. 3 is a characteristic diagram of a digitally commanded air system without a load variable device, and Fig. 4 5 is a characteristic diagram of a digitally commanded air brake device with a variable load device, FIG. 5 is a control block diagram showing an embodiment of the brake control device according to the present invention, and FIG. 6 is a diagram showing an embodiment of the brake control device according to the present invention. It is an explanatory diagram explaining the characteristic of the air brake in case. In the figure, 1 is the brake command amount creation circuit, 2 is the A/
A D conversion device, 4 is a divider, and 5 is an air brake device. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1 A brake command amount generation circuit that outputs a brake force command amount based on a brake command and a variable load signal, and a digital air brake command that generates an air brake force command amount obtained by subtracting an electric brake amount from the brake force command amount. An AD converter that converts to
In the brake control device comprising an air brake device that is driven in accordance with the digital air brake command, a divider is provided for dividing the air brake force command amount by the variable load signal and inputting the result to the AD converter. Also, a brake control device characterized in that, as the air brake device, an air brake device with a variable load device that outputs a braking force according to the variable load signal is used.