Platform Stabilization via Isolation Array and Active Damping

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Solution Overview

Problem

Current active platform stabilization systems face challenges with cost, complexity, and reliability due to complex mechanical gimbal systems, which include tight machining tolerances, complex assembly requirements, and ongoing maintenance needs.

Innovation Solution

A platform stabilization system that isolates a payload from motion using an isolation array directly connecting the support frame and platform without intervening gimbals, allowing linear and rotational movement with greater resistance to linear motion, and utilizing an active drive system and control system for stabilization and damping.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If complex mechanical gimbal systems are used for platform stabilization, then stabilization performance is improved, but device complexity and cost increase

Engineering Contradiction:
Improveplatform stabilizationVSAvoidgimbal system complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent removes the complex mechanical gimbal structures from the stabilization system, extracting only the essential function of isolating the payload from platform motion. This is achieved through a direct-mount configuration where the payload is suspended from the platform using simple elastic elements or dampers, eliminating the need for intricate gimbal mechanisms while maintaining stabilization performance.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical gimbal system with a non-mechanical or simplified mechanical suspension system using elastic elements, springs, or dampers. This substitution eliminates complex mechanical linkages, bearings, and actuators while achieving the same stabilization effect through passive elastic isolation or active control of simpler components.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Stability of the object's composition

If complex mechanical gimbal systems are used for platform stabilization, then stabilization performance is improved, but manufacturing and maintenance difficulty increase

Engineering Contradiction:
Improveplatform stabilizationVSAvoidassembly and maintenance ease
Core Design Contradiction:
Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent extracts the essential stabilization function from the complex gimbal system, leaving only simple suspension elements that are easy to manufacture and assemble. The payload is directly mounted to the platform using straightforward elastic or damping elements, eliminating the need for precision-machined gimbal components and complex assembly procedures.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs simple, inexpensive suspension elements such as elastic bands, springs, or basic dampers that can be easily replaced if needed. These components are far simpler and more economical than precision mechanical gimbals, reducing both initial manufacturing cost and ongoing maintenance expenses.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

3Stability of the object's composition

If traditional isolation systems are used, then payload isolation from linear motion is achieved, but rotational movement is constrained

Engineering Contradiction:
Improvepayload isolationVSAvoidrotational freedom
Core Design Contradiction:
Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The patent segments the isolation function into independent linear and rotational components. The suspension system provides linear isolation through vertical elastic elements, while the payload is permitted to rotate freely about the suspension point. This segmentation allows each degree of freedom to be treated independently, achieving both isolation and rotational freedom.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent changes the isolation parameters by using asymmetric suspension configurations or anisotropic damping elements that provide strong isolation in the linear direction while offering minimal resistance to rotational motion. This parameter differentiation allows the system to simultaneously achieve linear isolation and rotational freedom.

Inventive Principle:
Principle #35Parameter changes

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 reduces the complexity and cost of the system while enhancing reliability by eliminating the need for intricate gimbal structures and improving the platform's stability and damping capabilities.

Implementation Method 1

Each isolator permits linear movement of the platform relative to the support frame with three degrees of freedom and each isolator permits rotational movement of the platform relative to the support frame with three degrees of freedom

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

an active drive system and control system for stabilization and damping

Methodology Applied
Scientific EffectElectromagnetic force: Lorentz Force

Implementation Method 3

utilizing an active drive system and control system for stabilization and damping

Methodology Applied
Scientific EffectDamping: Damping

Data Source

PatentEP3105492B1Platform stabilization system
Publication Date: 2019.05.08 PV LABS LTD
  • EP3105492B1 patent drawingFigure 1
  • EP3105492B1 patent drawingFigure 2a~2b
  • EP3105492B1 patent drawingFigure 3a~3b

AI summary

A platform stabilization system comprises a support frame, a platform and a plurality of isolators each extending directly between the support frame and the platform. Each isolator permits linear movement of the platform relative to the support frame with three degrees of freedom and permits rotational movement of the platform relative to the support frame with three degrees of freedom. The isolators cooperate to form an isolation array supporting the platform directly within, and spacing the platform from, the support frame. The isolation array permits limited linear movement of the platform within the support frame with three degrees of freedom and permits limited rotational movement of the platform relative to the support frame with three degrees of freedom. The isolation array is substantially more resistant to linear movement of the platform than to rotational movement of the platform and does not rotationally constrain the platform.