Electric Drive Torque Control for Zero-Crossing Anti-Jerk
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Solution Overview
Problem
Current electric drive anti-jerk control methods fail to address jerking issues under various operating conditions, leading to poor anti-jerk performance.
Innovation Solution
An electric drive anti-jerk control method that adjusts torque output based on specified gradients, sets specific anti-jerk torques for upward and downward zero-crossing states, and compensates for wheel speed differences to improve smoothness and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current electric drive anti-jerk control methods are used to control torque change during zero-crossing, then zero-crossing jerking is addressed, but jerking problems under other operating conditions are not solved
Solution Approach 1:
The control method integrates multiple anti-jerk strategies into a single unified system that can handle zero-crossing conditions, gear clearance conditions, and general operating conditions. The motor control unit selectively applies different control approaches based on the current operating state, making the system universally applicable across all vehicle operating conditions rather than specialized for only zero-crossing scenarios
2Speed
If target torque is adjusted directly without gradient control, then response speed is fast, but torque changes cause vehicle jerking
Solution Approach 1:
The system dynamically adjusts the torque change rate based on real-time operating conditions. During zero-crossing or gear clearance events, the control method limits the torque change gradient to prevent jerking. During normal operations, the system allows faster torque response. This dynamic adjustment of control parameters based on operating state resolves the contradiction between fast response and smooth operation
3Stability of the object's composition
If gear torque is increased to limit gear clearance, then gear clearance is reduced, but torque smoothness during normal operation is affected
Solution Approach 1:
The control method applies gear torque in advance when gear clearance is detected or anticipated, rather than continuously applying it during all operations. By detecting gear clearance conditions and selectively applying compensatory torque only when needed, the system eliminates gear clearance issues without degrading torque smoothness during normal operating conditions
Data Source
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AI summary
The present application discloses an electric drive anti-jerk control method and module, a vehicle, and a computer storage medium. The method takes into account the jerking problem in various scenarios. For the scenario of switching operating conditions, in this method, when a torque output by a motor is controlled based on a target torque, the target torque is adjusted with a specified gradient, so as to improve the smoothness of the change of the torque output by the motor, thereby improving the jerking problem in this scenario. For the scenario of torque zero-crossing, in this method, a corresponding second anti-jerk torque and a corresponding third anti-jerk torque are set for an upward zero-crossing state and a downward zero-crossing state, respectively, to improve the jerking problem in this scenario. In addition, the method also takes into account a wheel speed difference anti-jerk torque, so as to compensate for jerking caused by wheel speed differences. For the jerking problem under various operating conditions, in the present application, corresponding methods for controlling the torque output by the motor are set, thereby improving the accuracy of the method, and then improving the anti-jerk effect.