Sliding mode control of electronic mechanical braking system based on new power exponential
Controlling clamp force is an important part of electromechanical braking systems of rail train. Given the fluctuations of braking torque and pressure caused by the thickness difference, mechanical interference and end face jumping of the brake disc in the rail trains' electronic mechanical bra...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2025-01-01
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| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails?columnId=112427353&Fpath=home&index=0 |
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| Summary: | Controlling clamp force is an important part of electromechanical braking systems of rail train. Given the fluctuations of braking torque and pressure caused by the thickness difference, mechanical interference and end face jumping of the brake disc in the rail trains' electronic mechanical braking system, a force closed-loop sliding mode control algorithm features stronger robustness than traditional PI algorithm was constructed. In response to the chattering problem of sliding mode control, an improvement is made in the exponential convergence law, and a new power exponential convergence law is proposed. Through mathematical derivation, it is proven that its convergence time is shorter, the vibrating and chattering amplitude is smaller. Comparative analysis between simulation results and experimental data also shows that under the power exponent reaching law control, the actual clamping force can track the target clamping force more rapidly. After reaching the target clamping force, the actual clamping force exhibits smaller fluctuations and vibration amplitudes |
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| ISSN: | 1000-128X |