Force Feedback Compensation for Inertial and Damping Forces
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Solution Overview
Problem
Active inceptor systems used in user input devices, such as those controlling aircraft flight surfaces, face limitations in bandwidth due to inertial forces, which can result in a sluggish tactile feel and reduced performance if not mitigated.
Innovation Solution
A method to determine and compensate for inertial and damping forces by obtaining velocity and acceleration information, combining them to calculate a total compensation force, and applying this to the force feedback circuitry to enhance system bandwidth and tactile feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If active inceptor systems simulate a mass-spring-damper feel model, then force feedback is provided to the operator, but inertial forces cause sluggish tactile feel and reduced bandwidth
Solution Approach 1:
The system calculates compensation forces based on predicted inertial and damping effects before they degrade the tactile feedback. By obtaining velocity and acceleration information and computing compensation forces in advance, the system counteracts the sluggishness caused by inertial forces before they manifest as performance degradation.
Solution Approach 2:
The system continuously monitors velocity and acceleration through sensors and uses this feedback to dynamically adjust the compensation force applied to the feel model. This closed-loop feedback mechanism ensures that the compensation adapts to real-time operating conditions, maintaining optimal tactile feedback quality across varying bandwidth requirements.
2Productivity
If inertial forces are not mitigated, then the system structure remains simple, but performance and tactile feel deteriorate
Solution Approach 1:
Instead of using complex mechanical structures to physically compensate for inertial forces, the system substitutes mechanical compensation with computational compensation. The force feedback circuitry calculates compensation forces based on velocity and acceleration data and applies them through electronic control, achieving high performance without adding mechanical complexity.
Solution Approach 2:
The system dynamically adjusts the compensation force parameters based on real-time velocity and acceleration measurements. By changing the compensation parameters adaptively rather than using fixed mechanical compensation, the system achieves high performance across varying operating conditions without requiring complex mechanical structures for each scenario.
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 improves the system bandwidth and tactile feedback quality by mitigating inertial forces, leading to enhanced performance and user experience in controlling vehicles or other applications.
Implementation Method 1
a force sensor to sense a force applied to the user input device
Data Source
AI summary
A method to obtain total compensation force information of a user input device is disclosed. The method comprising obtaining velocity information of a portion of the user input device. Obtaining acceleration information of the portion of the user input device. Obtaining damping force information force based on the velocity information. Obtaining inertial compensation force information based on the acceleration information. Combining the damping compensation force and inertial compensation force to provide the compensation force information of the user input device.