Unified Brake Controller for Multi-Mode Actuation
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Solution Overview
Problem
Existing brake control systems for electrically actuated brakes are complex and require multiple controllers for different control modes, leading to increased production costs and complexity, as well as potential undefined controller states during mode switching.
Innovation Solution
A unified controller structure with a selection and evaluation device that determines appropriate input variables for different control modes, such as force, speed, or position control, allowing the same controller structure to operate in multiple modes without the need for internal switching operations, thereby reducing the number of controllers and simplifying control operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple controllers are used for different control modes (force control, position control), then the control functionality is improved, but the device complexity and production costs increase
Solution Approach 1:
The patent implements a single controller device that can perform multiple control modes (force control, position control, speed control) by dynamically selecting and evaluating different input variables based on a control mode parameter. This universal controller replaces multiple dedicated controllers, reducing device complexity while maintaining full control functionality across different operating modes.
2Adaptability or versatility
If switching between control modes is implemented using parallel units, then the control flexibility is improved, but the switching operations become complex and may lead to undefined controller states
Solution Approach 1:
The patent employs dynamic selection of control mode input variables within a single controller structure. The selection and evaluation device dynamically determines which input variables (force, position, or speed) to use based on the control mode parameter, allowing smooth transitions between control modes without complex switching operations or risk of undefined states.
3Device complexity
If a uniform controller structure is used for all control modes, then the production costs and device complexity are reduced, but the ability to perform different control modes is limited
Solution Approach 1:
The patent maintains a uniform controller structure that adapts to different control modes by changing the input parameters. The selection and evaluation device modifies which parameters (actuator clamping force, actuator position, actuator speed) are used as input variables based on the control mode parameter, enabling the same controller hardware to perform force control, position control, and speed control without structural modifications.
Data Source
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AI summary
A method for controlling a brake which can be actuated electrically by means of an actuator (2), in which an actuator clamping force actual-value (Fact) can be determined by means of a clamping force sensor (7), and an actuator position actual-value (fact) and/or an actuator speed actual-value (nact) can be determined by means of a position sensor (8), and in which a manipulated variable (U) for driving the actuator (2) is generated by means of a controller device (1), wherein the controller device (1) comprises a selection and evaluation device (3) and a controller structure (4), and wherein the selection and evaluation device (3) of the controller structure (4) feeds in a controller structure input setpoint value (fin-act) and a controller structure input actual value (fin-act) as controller structure input variables, and wherein the controller structure input variables (fin-setp, fin-act) are made available by the selection and evaluation device (3) in such a way that the controller device (1) can be operated by the same controller structure (4) in at least two of the control modes of force control (M1) for setting an actuator clamping force setpoint value (Fsetp) or position control (M3, M4) for setting an actuator position setpoint value (fsetp, ?fsetp) or speed control (M2) for setting an actuator speed setpoint value (nsetp), and a device.