Ultrasonic Actuator Simulated Traveling Wave
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ultrasonic linear motors with traditional oval waveguides face limitations in minimizing dimensions, maximizing speed, tractive force, mechanical performance, and efficiency due to shape-induced distortions and energy losses.
Innovation Solution
An ultrasonic actuator design that eliminates the need for straight and curved sections in waveguides, using primary and auxiliary waveguide resonators connected by crosspieces to generate simulated traveling waves, reducing friction and energy losses, and allowing for smaller dimensions and improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional oval waveguides with straight and curved sections are used, then the waveguide structure is simple to manufacture, but the acoustic travelling wave is distorted and energy losses increase
Solution Approach 1:
The waveguide is divided into multiple straight sections connected by angled joints, eliminating the need for curved sections. This segmentation allows the waveguide to maintain acoustic wave integrity while simplifying manufacturing, directly reducing energy losses from wave distortion.
Solution Approach 2:
The traditional curved mechanical waveguide structure is replaced with a system of straight sections and angled joints. This substitution eliminates the mechanical complexity of curved sections while maintaining wave transmission efficiency, reducing both manufacturing difficulty and energy losses.
2Force
If oval waveguides with curved sections are used, then the waveguide can be compact, but the elliptical trajectory becomes inhomogeneous and frictional contact increases
Solution Approach 1:
The waveguide path is segmented into straight sections with controlled angled joints, creating a polygonal approximation of the desired path. This segmentation ensures homogeneous elliptical trajectory at the friction surface, improving tractive force while maintaining compact dimensions.
Solution Approach 2:
The waveguide structure is designed with varying local characteristics - straight sections provide uniform motion, while angled joints provide controlled direction changes. This local quality variation ensures homogeneous elliptical trajectory throughout the waveguide path, optimizing tractive force.
3Volume of moving object
If straight sections are eliminated from the waveguide, then the motor dimensions can be reduced, but the waveguide routing becomes more complex
Solution Approach 1:
Multiple functional sections (wave transmission, direction change, and support) are merged into integrated angled joint structures. This merging eliminates the need for separate straight sections while maintaining efficient wave routing, reducing motor dimensions without excessive complexity.
Solution Approach 2:
The waveguide routing utilizes three-dimensional space with angled joints positioned at different heights and orientations. This dimensional approach allows compact waveguide routing that eliminates straight sections while maintaining efficient acoustic wave transmission.
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 design enhances the maximum speed, tractive force, and mechanical efficiency of the ultrasonic motor, enabling broader applications in precision systems and high-precision positioning.
Implementation Method 1
at least one primary waveguide resonator, with each of which one primary generator is in flat contact in order to form an acoustic standing wave, at least one auxiliary waveguide resonator, with each of which one auxiliary generator is in contact in order to form an acoustic standing wave
Implementation Method 2
the at least one crosspiece functions as a totalising device of the acoustic standing waves propagated in the primary and auxiliary waveguide resonators, so that the at least one crosspiece functions as the generator of a simulated travelling wave
Implementation Method 3
a positioning element, which is pressed along at least one friction track with a predefined force in the ultrasonic motor to effect a linear movement thereof
Data Source
AI summary
An ultrasonic actuator includes at least one primary waveguide resonator, with each primary generator being in flat, at least one auxiliary waveguide resonator, with each auxiliary generator being in contact in order to form an acoustic standing wave, at least one crosspiece that connects one of the at least one primary waveguide resonators and one of the at least one auxiliary waveguide resonators to each other at least in sections, and wherein at least one friction track or friction rail is arranged on the crosspiece wherein the at least one primary waveguide resonator and the at least one auxiliary waveguide resonator is an open linear waveguide, and the at least one crosspiece functions as a totalizing device of the acoustic standing waves propagated in the primary and auxiliary waveguide resonators, so that the at least one crosspiece functions as the generator of a simulated travelling wave.