Motion Simulator Driving Part Linkage for Shaking Reduction
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Solution Overview
Problem
Conventional motion simulators face instability and shaking issues, particularly when multiple passengers are on board, due to the weight distribution and the configuration of supporting mechanisms.
Innovation Solution
A motion simulator design featuring three driving parts that support the riding part at triangularly positioned points, utilizing linear actuators and link members with ball joints and support link members to stabilize the lower portion, allowing for smooth rotational and linear movements while preventing shaking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If three driving members support the lower part of the riding part, then the structure is simplified, but the riding part is not stably supported and shaking occurs
Solution Approach 1:
Each driving member is segmented into multiple functional components: a linear actuator for vertical motion, a movable link member for rotational coupling, and a fixed link member for structural support. This segmentation allows each component to perform its specific function optimally while working together to provide stable support.
Solution Approach 2:
The supporting structure transitions from simple vertical support to multi-dimensional motion control by incorporating rotational joints and linkages. The movable link members enable rotational movement around hinge points, adding angular degrees of freedom to the originally linear actuator system, thereby achieving both stability and controlled motion.
2Adaptability or versatility
If the riding part supports multiple passengers, then the simulator capacity is improved, but the weight increases and shaking occurs during operation
Solution Approach 1:
The fixed link members are positioned and dimensioned to create a counterbalancing effect against the weight of multiple passengers. The triangular arrangement of driving members with fixed linkages provides structural rigidity that counteracts the increased load, preventing excessive sagging or instability when multiple passengers are onboard.
Solution Approach 2:
Ball joints are incorporated at the connection points between link members and the riding part. These spherical joints allow for multi-directional rotation and movement, accommodating the dynamic weight distribution of multiple passengers while maintaining stable support through geometric constraint.
3Measurement precision
If linear actuators are used for motion control, then the motion precision is improved, but the shaking and vibration are transmitted to the riding part
Solution Approach 1:
The link member system acts as a mechanical cushion between the linear actuator and the riding part. The movable link members with rotational joints absorb high-frequency vibrations and shocks generated by the actuator before they can be transmitted to the passenger compartment, while still allowing precise motion control to pass through.
Solution Approach 2:
The fixed link members serve as intermediary structural elements that decouple the actuator's motion from direct transmission to the riding part. This intermediate linkage system filters out harmful vibrations while maintaining the precision of the intended motion through geometric constraints and rigid connections.
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
The design enhances the stability and operational reliability of the motion simulator by distributing the weight effectively and absorbing rotational movements, reducing shaking and improving the overall simulation experience.
Implementation Method 1
The linear actuator includes a motor, a shaft configured to perform a rotational motion by the motor, and a moving body configured to perform a linear motion by the rotational motion of the shaft.
Implementation Method 2
a first ball joint configured to be relatively movable within a range of a length of a first supporting shaft
Implementation Method 3
first movable link members each having a lower end portion hinged to the first moving body and an upper end portion hinged to a lower end portion of the riding part
Data Source
AI summary
A motion simulator capable of preventing shaking of a riding part is disclosed. The motion simulator includes a riding part (100) on which a passenger rides and a plurality of driving parts configured to support a lower portion of the riding part (100),wherein the plurality of driving parts include a first driving part (200-1) configured to support a central portion of the riding part (100), and a second driving part (200-2) and a third driving part (200-3) positioned on both sides of the first driving part (200-1) with the first driving part (200-1) therebetween and configured to support one side and the other side of the lower portion of the riding part (100), respectively, and the first driving part (200-1) includes a first linear actuator configured to linearly reciprocate a first moving body (216-1), first movable link members (220-1 and 221-1) each having a lower end portion hinged to the first moving body (216-1) and an upper end portion hinged to a lower end portion of the riding part (100), a first fixed link member (230-1) having an upper end portion hinged to the first movable link members (220-1 and 221-1) and a lower end portion hinged at a position spaced apart from the first moving body (216-1), a first support link member (240-1) having an upper end portion supporting one side of the first fixed link member (230-1) and a lower end portion hinged at a position in a straight line with the lower end portion of the first fixed link member (230-1), and a second support link member (250-1) having an upper end portion supporting the other side of the first fixed link member (230-1) and a lower end portion hinged at a position in a straight line with the lower end portion of the first fixed link member (230-1) and the lower end portion of the first support link member (240-1).