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This paper develops a strategy for the design of robust observers upon thermoacoustic dynamics with both spatial and temporal dimension‐infiniteness, model‐truncation error and exogenous disturbance. It helps the identification of their assumed flame dynamics that is feedback‐interconnected with the thermoacoustic dynamics in a combustion chamber and is usually to‐be‐identified. This paper formulates the proceedings to the proposed strategy and performs numerical tests for such a strategy.

For electric scooters, this work develops linear parameter-varying systems (LPV) control synthesis to fulfill the trade-off between energy consumption per distance and propulsion capability in transience. The synthesized regulator functions as the transmission in the transient state, which is analogous to gear transmission in the steady state. Simulations and experiments are provided to verify the proposed synthesis, wherein a per-distance strategy is shown to have better performance in terms of energy and motion than a per-time strategy.

In this paper we design a controllable type of thermoacoustic engine and model its process of energy transfer. In modeling, the conservation of thermoacoustic storage is formulated to determine engine cycles, capable of quantifying the effects of working gas and temperature on the power ratings, as well as shaping the engine chamber adaptable to mechatronic load in power transmission. Moreover, this conservation law can be applied to identify, through energy‐loss measurement, the parametric modeling upon flow leakage at the load end. Meanwhile, with the 2D transfer‐function modeling, the coupling of Rijke chamber dynamics and load dynamics is represented by feedback interconnection, which transforms the overall design into feedback systems synthesis. Based on such an internal feedback construction, digital signal processing is implemented to do numerical calculations on engine cycles with different working gases, temperatures, and frequencies of excitation, wherein typical situations are presented.

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