A high-precision variable-thrust control method based on real-time measurement of pintle displacement and closed-loop feedback is proposed to solve the technical problems deep throttling regulation liquid rocket engines (LRE). By optimizing system structure parameters, with high precision a fast response under wide range variable thrust can be realized, thus large-range, fast-response, chamber ...

A simple, basic and general model for describing both the (input-output) behavior and the implementation of distributed systems is presented. An important feature of the model is the separation of the machinery used to describe the implementation and the behavior. This feature makes the model potentially useful for design specification of systems and of subsystems. The implementation model reli...

This paper develops a method for solving the single product multi-period production-planning problem, in which the production and the inventory costs of each period arc concave and backlogging is not permitted. It is also assumed that the unit variable cost of the production evolves according to a continuous time Markov process. We prove that this production-planning problem can be Stated as a ...

This paper presents the design and implementation of a seismic noise analysis recorder. Specifically, system has three main blocks. A configurable gain amplifier, microcontroller for data acquisition storage, finally, both GPS module real-time clock in order to ensure time synchronization. With regard device management, mobile application was implemented which provides users with tools analyze ...