Continuous continuation method for closed-loop control parameters of accelerator motor control system

Abstract

The invention discloses an accelerator motor control system closed-loop control parameter continuous continuation method, which comprises the following steps: based on an incremental PID closed-loop control algorithm, introducing a novel B-spline basis function, firstly, selecting representative valve opening and closing angles as typical nodes according to output characteristics of different motor control systems or different applications, and carrying out continuous continuation on the valve opening and closing angles; a plurality of corresponding discrete PID control parameters are obtained through a transfer function model and output error control of an accelerator motor control system, the PID control parameter is the PID control parameter of the ith node, a piecewise continuous PID function is obtained through a novel B-spline basis function, then the range interval of the typical working condition where the current working condition of the control system is located is determined, and the current working condition of the control system is determined. And determining the position of the function and obtaining corresponding closed-loop control P, I and D parameters so as to accurately control any working condition of the stepping motor. According to the method, the problem of low control precision caused by simplification of PID control parameters of a traditional accelerator motor stepping motor control system under all working conditions is effectively solved, and the accuracy and efficiency of PID control parameter fitting shape and curvature adjustment are improved.

Description

technical field

[0001] The invention relates to the field of throttle motor control systems, in particular to a continuous extension method for closed-loop control parameters of a throttle motor control system. Background technique

[0002] The throttle motor control system uses a high-torque stepper motor to precisely control the corresponding stroke of the fuel injection valve according to the opening and closing of the throttle. In order to improve the control accuracy, the closed-loop control algorithm based on incremental PID has been widely used in the field of stepper motor control. In conventional applications, PID control parameters in the field of stepper motor control are generally set comprehensively through experiments and theoretical models, and unique parameters are used for all operating conditions. In fact, since the stepper motor control system model exhibits obvious nonlinear characteristics under different operating conditions such as rotational speed, d...

Examples

Embodiment Construction

[0017] In order to describe in detail the technical content, structural features, achieved objectives and effects of the technical solution, the following detailed description is given in conjunction with specific embodiments and accompanying drawings.

[0018] see figure 1 , In this embodiment, a method for continuous continuation of closed-loop control parameters of a throttle motor control system includes the following steps:

[0019] S1: Select a representative valve opening and closing angle as a typical node according to the output characteristics of different motor control systems or different applications;

[0020] S2: The corresponding n discrete PID control parameters M are obtained through the transfer function model of the throttle motor control system and the output error control i (P i ,I i ,D i ), i=0,...,n-1, where P i ,I i ,D i is the PID control parameter of the i-th node;

[0021] S3: The new B-spline basis function is introduced as:

[0022]

[...

technical field

[0001] The invention relates to the field of throttle motor control systems, in particular to a continuous extension method for closed-loop control parameters of a throttle motor control system. Background technique

[0002] The throttle motor control system uses a high-torque stepper motor to precisely control the corresponding stroke of the fuel injection valve according to the opening and closing of the throttle. In order to improve the control accuracy, the closed-loop control algorithm based on incremental PID has been widely used in the field of stepper motor control. In conventional applications, PID control parameters in the field of stepper motor control are generally set comprehensively through experiments and theoretical models, and unique parameters are used for all operating conditions. In fact, since the stepper motor control system model exhibits obvious nonlinear characteristics under different operating conditions such as rotational speed, d...

Examples

Embodiment Construction

[0017] In order to describe in detail the technical content, structural features, achieved objectives and effects of the technical solution, the following detailed description is given in conjunction with specific embodiments and accompanying drawings.

[0018] see figure 1 , In this embodiment, a method for continuous continuation of closed-loop control parameters of a throttle motor control system includes the following steps:

[0019] S1: Select a representative valve opening and closing angle as a typical node according to the output characteristics of different motor control systems or different applications;

[0020] S2: The corresponding n discrete PID control parameters M are obtained through the transfer function model of the throttle motor control system and the output error control i (P i ,I i ,D i ), i=0,...,n-1, where P i ,I i ,D i is the PID control parameter of the i-th node;

[0021] S3: The new B-spline basis function is introduced as:

[0022]

[...

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