No nlinear Feedback Control and Stability Analysis of a Proof-of-Work Blockchain

【Author】 Hovland, G.; Kucera, J.

【Source】MODELING IDENTIFICATION AND CONTROL

【影响因子】1.091

【Abstract】In this paper a novel feedback controller and stability analysis of a blockchain implementation is developed by using a control engineering perspective. The controller output equals the difficulty adjustment in the mining process while the feedback variable is the average block time over a certain time period. The computational power (hash rate) of the miners is considered a disturbance in the model. The developed controller is tested against a simulation model with constant disturbance, step and ramp responses as well as with a high-frequency sinusoidal disturbance. Stability and a fast response is demonstrated in all these cases with a controller which adjusts it's output at every new block. Finally the performance of the controller is implemented and demonstrated on a testnet with a constant hash rate as well as on the mainnet of a public open source blockchain project.

【Keywords】No nlinear; control system; blockchain; feedback; stability; disturbance rejection

【发表时间】2017

【收录时间】2022-01-02

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