Joint Controller for Vehicle Power Train Stability
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Solution Overview
Problem
The complexity of interactions between software modules in a vehicle's power train leads to functional risks, deceleration of development processes, reduced insight into the overall system, and difficulties in analyzing stability due to non-linear characteristic curves and lack of communication between modules.
Innovation Solution
A joint controller with a state observer and controlling entities is used, combining separate controllers and switching formal controlling parameters based on the current mode of operation to manage interactions and simplify system analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate software modules are used for controlling different functions, then functional flexibility and modularity are improved, but system complexity and interaction risks increase
Solution Approach 1:
The control system is divided into separate software modules, each responsible for specific functions (engine control, clutch control, damping control). This segmentation allows independent development and modification of each module while maintaining overall system functionality through standardized interfaces.
Solution Approach 2:
A joint controller acts as an intermediary that coordinates the separate software modules. It manages parameter switching between modules based on operating modes and ensures coherent system behavior, reducing direct interactions and associated risks between modules.
2Adaptability or versatility
If multiple separate software modules are used, then functional coverage is improved, but development speed decreases due to complex interactions
Solution Approach 1:
By segmenting the control system into independent software modules, each module can be developed, tested, and modified separately without affecting others. This modular approach accelerates development while maintaining comprehensive functional coverage.
Solution Approach 2:
The joint controller serves multiple functions: it coordinates different software modules, manages parameter switching across operating modes, and provides overall system integration. This multi-functionality reduces the need for separate coordination mechanisms, speeding up development.
3Device complexity
If separate software modules are used without communication, then module independence is improved, but system stability analysis becomes difficult
Solution Approach 1:
The joint controller serves as a mediator that establishes controlled communication between independent software modules. It enables stability analysis by providing a centralized coordination point while preserving module independence through standardized interfaces and parameter management.
Data Source
AI summary
A method and controller are provided for controlling a power train of a vehicle having a number of modes of operation. A first controller is provided for controlling of a first function of the vehicle. At least one second controller is provided for controlling of a second function of the vehicle. The first controller and the at least one second controller are combined in a joint controller having a state observer and a number of controlling entities. The joint controller is operated by a set of formal controlling parameters assigned to the controlling entities. Actual parameters of the set of formal controlling parameters are switched according to a current mode of the number of modes of operation.