Open-Loop Braking Signals for Sharp Cutoff Haptic Effects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional haptic actuators struggle to produce precise, limited or extended duration haptic effects with sharp cutoffs, as they often require complex and costly control mechanisms to achieve abrupt endings, which is not efficiently addressed by existing open loop control techniques.
Innovation Solution
The implementation of active, open-loop braking signals in haptic actuators, where the timing and duration of braking signals are determined based on the analysis of the driving signal to control the actuator's motion and energy input, allowing for the generation of haptic effects with sharp cutoffs without the need for explicit actuator energy or motion estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional open loop control techniques are used for vibration actuators, then manufacturing costs are reduced, but the ability to produce haptic effects with sharp cutoffs is lost
Solution Approach 1:
The system performs preliminary analysis of the driving signal characteristics (amplitude, frequency, number of peaks) before generating braking signals. This preliminary action enables the control circuit to pre-determine the optimal braking parameters, allowing sharp cutoffs to be achieved without requiring complex real-time control mechanisms, thus maintaining cost-effectiveness while improving precision
Solution Approach 2:
The invention applies periodic braking signals at strategically determined intervals based on the driving signal analysis. By applying braking forces at specific periodic moments rather than continuously, the system achieves sharp cutoffs with simpler control logic compared to continuous closed-loop control, resolving the contradiction between manufacturing simplicity and haptic precision
2Manufacturing precision
If complex control mechanisms are implemented to achieve sharp cutoffs, then haptic effect precision is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The invention extracts only the essential characteristics needed for braking control from the driving signal (amplitude, frequency, peak count) and uses these extracted parameters to generate braking signals. This selective extraction approach achieves precise sharp cutoffs without requiring the full complexity of closed-loop feedback systems, thereby improving precision while controlling device complexity
Solution Approach 2:
The system creates a simplified model or copy of the driving signal characteristics to determine braking parameters, rather than implementing a full replica of complex closed-loop control mechanisms. This copying approach allows the system to achieve similar precision outcomes with significantly reduced control mechanism complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables the production of haptic effects with sharp cutoffs, reducing costs and complexity by using existing hardware, and providing accurate braking in existing systems, thus enhancing the control over haptic feedback in devices.
Implementation Method 1
Active, open-loop, braking is applied to actuators to arrest the motion of the actuator
Data Source
AI summary
Systems, methods, and devices for control of actuators are provided. In aspects, the systems, methods, and devices provided herein enable the generation of sharp cutoff haptic effects of both limited and extended duration. The systems, methods, and devices use open loop braking signals to generate the sharp cutoff haptic effects. The braking signals are determined based on predictions of system response made according to driving signals used to cause the haptic effects in the actuators. Numerous other aspects are provided.