Random-Key Optimization for Robotic Sequencing Plans
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Solution Overview
Problem
Existing computing systems face challenges in generating optimal sequencing plans for complex systems, such as robotic movements in manufacturing facilities, due to computational capacity limitations, which hinder efficient task completion and collision avoidance.
Innovation Solution
Implementing random key optimization techniques, specifically the biased random-key genetic algorithm (BRKGA) and dual annealing, to iteratively search for solutions to sequencing plan optimization problems, combined with decoding mechanisms to generate feasible motion plans for robots, and utilizing quantum annealing devices for enhanced problem-solving capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If exact optimization methods are used for sequencing plans, then solution optimality is improved, but computational time and complexity increase exponentially
Solution Approach 1:
The patent transforms the discrete sequencing problem into a continuous optimization problem by mapping sequence positions to continuous values in the range (0,1). This parameter transformation enables the use of efficient continuous optimization algorithms instead of exhaustive discrete search methods, resolving the contradiction between solution quality and computational time.
Solution Approach 2:
The patent replaces traditional mechanical combinatorial optimization approaches with quantum annealing computation. By formulating the sequencing problem as a Quadratic Unconstrained Binary Optimization (QUBO) model and solving it using quantum annealing, the system achieves better optimization performance with reduced computational time compared to classical exact methods.
2Reliability
If comprehensive sequencing constraints are enforced, then solution feasibility is improved, but computational complexity increases
Solution Approach 1:
The patent incorporates all sequencing constraints into the objective function formulation before optimization begins. By encoding constraints such as resource availability, task dependencies, and collision avoidance directly into the QUBO model's energy landscape, the method ensures feasibility is built-in from the start rather than requiring complex post-processing or iterative constraint checking.
Solution Approach 2:
The patent merges multiple sequencing constraints into a unified objective function. Rather than handling each constraint separately through multiple computational passes or complex constraint satisfaction algorithms, all constraints are combined into a single energy minimization problem that the quantum annealer solves in one computation, reducing overall computational complexity.
3Measurement precision
If quantum annealing is used for optimization, then solution quality is improved, but hardware availability and accessibility are limited
Solution Approach 1:
The patent introduces a hybrid quantum-classical framework where the quantum annealer serves as an optional intermediary for solving the QUBO formulation. The system can operate in quantum mode when quantum hardware is accessible for high-quality solutions, or fall back to classical solvers when quantum hardware is unavailable, thus maintaining versatility while enabling access to superior optimization capabilities when possible.
Data Source
AI summary
Random key optimization is used to generate sequencing plans. An optimization problem is obtained to generate a sequencing plan. The optimization problem may be described according to nodes that represent decision variables of the optimization problem. A random optimization key technique may be applied to determine a vector of respective values for the nodes. The vector of respective values of the nodes may be decoded according to a sequence planning constraint to generate the sequencing plan and determine a fitness score for the sequencing plan.


