High-speed train push-pull system and speed tracking control method

Abstract

The invention discloses a high-speed train push-pull system and a speed tracking control method, and belongs to the technical field of nonlinear control. The invention aims to establish a high-speed train multi-mass-point model based on a push-pull driving design, establish a traction system model and a braking system model according to curve characteristic description of traction and braking, and design a controller. The high-speed train push-pull system with accurate speed tracking and the speed tracking control method are achieved by controlling the opening degree of a throttle valve and the pressure of a brake cylinder. The method comprises the steps of designing a high-speed train simple substance point model, a high-speed train push-pull system model, a four-section push-pull power system model and an optimal speed-displacement curve, and designing a switching-based NMPC model prediction controller. The new control strategy provided by the invention shows the effectiveness of the designed control system.

Description

technical field [0001] The invention belongs to the technical field of nonlinear control. Background technique [0002] High Speed ​​Train (HST), which provides efficient mobility, green transportation, and cost-effective travel, is considered a viable alternative to air travel under 650 km. Traditional trains are driven manually by the driver. The driver adjusts the traction and braking force of the train based on experience to keep the train running at a specified safe speed range, so precise control is not required. With the improvement of automation level and the improvement of people's requirements for train safety and comfort, cruise control has become an essential means of modern train control, which requires precise control of train traction and braking systems to make trains The speed curve operation realizes the precise control of the train's running acceleration, speed, arrival time, parking position and other running states to meet the comprehensive performance ...

AI Technical Summary

Problems solved by technology

[0007] 1. Distributed drive high-speed trains are not conducive to maintenance and poor economy;

[0008] 2. A high-speed train is a complex nonlinear system with multiple inputs, multiple outputs, strong coupling and disturbances. At the same time, the speed control problem of a high-speed train is a speed planning problem with multiple optimization objectives and multiple constraints.

Non-linear control algorithms that cannot handle constrained problems cannot guarantee the safety of train running

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