CN-121994508-A - Brake particulate matter emission test system

CN121994508ACN 121994508 ACN121994508 ACN 121994508ACN-121994508-A

Abstract

The invention provides a brake particulate matter emission test system which comprises an upper computer, a real-time controller, a torque meter, a speed control system and a dynamic brake working condition simulation precision, wherein the upper computer sends target brake torque and target rotating speed to the real-time controller, the real-time controller determines a target brake position according to the target brake torque and a torque closed-loop control algorithm, determines target loading torque according to the target rotating speed and the rotating speed closed-loop control algorithm, the torque meter is used for collecting actual brake torque and feeding back the actual brake torque to the real-time controller, the real-time controller is also used for carrying out feedforward compensation on the rotating speed according to the actual brake torque, the rotating speed and the torque are respectively subjected to independent closed-loop adjustment through a rotating speed closed-loop control algorithm and a torque closed-loop control algorithm, when the brake torque is adjusted, the rotating speed and the torque are decoupled, and the feedforward compensation can synchronously offset the interference on the rotating speed when the torque is changed, and the simulation precision of dynamic brake working condition is improved.

Inventors

HOU QIFENG
SUN ZHIYU
ZHU QIWEN
WANG CHONG
LIU WEILIN
LIU GANG
YU BAOFENG
LIU HANYU
XIAO GUANGYU
JIANG YU
HE NINGNING
Jiang Xiongliren
YANG XINPENG
REN MEILIN
CAO JINQI

Assignees

中汽研汽车检验中心（天津）有限公司

Dates

Publication Date: 20260508
Application Date: 20260227

Claims (10)

1. The system is used for providing a simulated braking working condition when the particulate matter emission test is carried out, and comprises an upper computer, a dynamometer, a torque meter, a braking actuator and a real-time controller; the upper computer is used for sending target braking torque and target rotating speed to the real-time controller; The real-time controller is used for determining a target braking position according to the target braking torque and torque closed-loop control algorithm and determining a target loading torque according to the target rotating speed and rotating speed closed-loop control algorithm; The brake actuator is used for adjusting the self braking position to the target braking position according to a first control instruction sent by the real-time controller; the dynamometer is used for adjusting the actual loading moment to the target loading moment according to a second control instruction sent by the real-time controller; the torque meter is used for collecting actual braking torque and feeding back the actual braking torque to the real-time controller; the real-time controller is also used for carrying out feedforward compensation on the rotating speed according to the actual braking torque.
2. The system of claim 1, wherein the real-time controller is specifically configured to: And determining a feedforward compensation loading moment by using a rotating speed closed-loop control algorithm and the actual braking torque, and compensating the rotating speed according to the feedforward compensation loading moment.
3. The system of claim 2, wherein the real-time controller is specifically configured to: determining a braking torque variation according to the target braking torque and the initial braking torque; And determining the feedforward compensation loading moment according to the braking torque variation and a feedforward compensation coefficient in the rotating speed closed-loop control algorithm, wherein the feedforward compensation loading moment is a product value of the braking torque variation and the feedforward compensation coefficient.
4. The system of claim 2, wherein the real-time controller is specifically configured to: acquiring the current loading moment of the dynamometer, and determining moment sum value according to the current loading moment and the feedforward compensation loading moment; And sending the moment sum value to a frequency converter, and driving the dynamometer to reach the moment sum value by using the frequency converter.
5. The system of claim 1, wherein the priority of the torque closed-loop control algorithm is higher than the priority of the torque closed-loop control algorithm.
6. The system of claim 1, wherein the real-time controller is further to: the actual rotating speed is obtained after feedforward compensation is carried out on the rotating speed according to the actual braking torque; determining a rotational speed deviation between the actual rotational speed and the target rotational speed; and adjusting the actual loading moment according to the rotation speed deviation so that the actual rotation speed is consistent with the target rotation speed.
7. The system of claim 1, wherein the system further comprises: the environment auxiliary equipment is used for providing required environment temperature, wind speed and humidity during testing; and the temperature control equipment is used for adjusting the temperature of the target component during testing.
8. The system of claim 1, wherein the system further comprises: The system comprises a programmable logic controller, a data acquisition device, a programmable logic controller, a test device, a data processing device and a control device, wherein the data acquisition device is used for acquiring operation data of each device in a test process and sending the operation data to the programmable logic controller, the operation data comprises test data and state data, the test data comprises torque, rotating speed and particle flow, and the state data comprises brake actuator travel, cooling flow, environment temperature, environment humidity, brake disc temperature, brake disc vibration data and vibration data of a vibration actuator; The programmable logic controller is used for executing safety interlocking triggering operation according to the state data.
9. The system of claim 8, wherein the programmable logic controller is specifically configured to: And when the state data exceeds the corresponding limit value, cutting off the power supply of equipment corresponding to the state data, and triggering an audible and visual alarm.
10. The system of claim 8, wherein the programmable logic controller is further electrically coupled to the real-time controller via a communication network, the programmable logic controller further configured to feed back to the real-time controller a safety interlock status and an operational status of each device.

Description

Brake particulate matter emission test system Technical Field The invention relates to the technical field of vehicle testing, in particular to a brake particulate matter emission testing system. Background Along with the gradual strictness of the automobile industry on the non-tail gas emission control, the accuracy requirement of the brake particulate matter emission test is upgraded from qualitative screening to quantitative tracing, and the brake particulate matter emission test is required to be carried out on the basis that a test system simulates a real brake working condition, so that the strict requirement is provided for the working condition simulation accuracy of the brake particulate matter emission test system. In the related art, a brake particulate matter testing system generally adopts a simple open-loop or single closed-loop control structure when simulating a brake working condition, so that the problems of poor repeatability, slow dynamic response and the like exist, and the control is unstable in the dynamic brake working condition, so that the working condition simulation precision of the brake particulate matter testing system is affected, and the high precision requirement of brake particulate matter detection cannot be met. Based on the above, a brake particulate matter emission test system is needed at present to solve the technical problems that the test system in the prior art has low simulation precision on brake working conditions, and further cannot meet the high precision requirement of brake particulate matter detection. Disclosure of Invention Aiming at the problems existing in the prior art, the embodiment of the invention provides a brake particulate matter emission test system to solve or partially solve the technical problem that the test system in the prior art cannot accurately simulate dynamic brake working conditions so as to influence brake particulate matter emission detection accuracy. The invention provides a brake particulate matter emission test system which is used for providing a simulated brake working condition when a particulate matter emission test is carried out; the upper computer is used for sending target braking torque and target rotating speed to the real-time controller; The real-time controller is used for determining a target braking position according to the target braking torque and torque closed-loop control algorithm and determining a target loading torque according to the target rotating speed and rotating speed closed-loop control algorithm; The brake actuator is used for adjusting the self braking position to the target braking position according to a first control instruction sent by the real-time controller; the dynamometer is used for adjusting the actual loading moment to the target loading moment according to a second control instruction sent by the real-time controller; the torque meter is used for collecting actual braking torque and feeding back the actual braking torque to the real-time controller; the real-time controller is also used for carrying out feedforward compensation on the rotating speed according to the actual braking torque. In the above scheme, the real-time controller is specifically configured to: And determining a feedforward compensation loading moment by using a rotating speed closed-loop control algorithm and the actual braking torque, and compensating the rotating speed according to the feedforward compensation loading moment. In the above scheme, the real-time controller is specifically configured to: determining a braking torque variation according to the target braking torque and the initial braking torque; And determining the feedforward compensation loading moment according to the braking torque variation and a feedforward compensation coefficient in the rotating speed closed-loop control algorithm, wherein the feedforward compensation loading moment is a product value of the braking torque variation and the feedforward compensation coefficient. In the above scheme, the real-time controller is specifically configured to: acquiring the current loading moment of the dynamometer, and determining moment sum value according to the current loading moment and the feedforward compensation loading moment; And sending the moment sum value to a frequency converter, and driving the dynamometer to reach the moment sum value by using the frequency converter. In the above scheme, the priority of the torque closed-loop control algorithm is higher than the priority of the torque closed-loop control algorithm. In the above scheme, the real-time controller is further configured to: the actual rotating speed is obtained after feedforward compensation is carried out on the rotating speed according to the actual braking torque; determining a rotational speed deviation between the actual rotational speed and the target rotational speed; and adjusting the actual loading moment according to the rotation speed deviation so that t