Simultaneous Design of Low-Pass Filter with Impedance Matching Transformer for SONAR Transducer Using Particle Swarm Optimization

Abstract

Sound navigation and ranging (SONAR) systems detect a target in the front direction by using acoustic signals. A switching-type power conversion system is used to improve power efficiency, and an impedance matching circuit is used to decrease reactive power. A low-pass filter is used to improve the quality of acoustic signals. To achieve the desired voltage level for a SONAR transducer, a transformer is connected in series with a low-pass filter. In conventional design methods, design value errors occur because the components are designed independently and later combined. Moreover, if parameters that considerably impact operating characteristics are ignored in the design process, these errors will increase. Hence, time and cost losses are incurred during refabrication because operational characteristics differ from design values. To solve this problem, this study proposes the simultaneous design of a low-pass filter and impedance matching circuit, which includes critical design parameters, utilizing the particle swarm optimization algorithm. Moreover, conventional design methods were examined, and the superiority of the proposed design method to conventional methods was verified through analyses and experiments in terms of overall impedance phase and filter blocking characteristics.

Design Procedure of Cascaded Multilevel Inverter for High-Power Amplifier in SONAR System

“…SONAR is used to detect underwater objects by converting electrical energy into sound. The SONAR power system contains the following components, as shown in Figure 1 [7][8][9].…”

Review of the design of power ultrasonic generator for piezoelectric transducer

“…The main circuit modules of PUG convert low-frequency ac sinusoidal signals into ultrasonic frequency ac signals by combining power electronic technology with modern intelligent control technology, then the matching circuit module filters the ultrasonic signals into proximate ideal sinusoidal signals which excite PTs to output the ultrasonic frequency vibrations and work in near pure resistance state [109] , [110] .…”

Optimized Design of a Sonar Transmitter for the High-Power Control of Multichannel Acoustic Transducers

“…To design the sonar transmitter, the circuit diagram is shown in Figure 2. Here, the BVD (Butterworth-Van Dyke) model is used for the equivalent circuit model of the transducer [3,9,21]. The transmitter's topology consists of the full-bridge inverter converting DC to AC, a low-pass output filter reducing THD, and a matching circuit using a magnetizing inductance of the transformer.…”

“…Instead, most studies have concentrated on impedance matching and filter design. Choi et al proposed an estimation method for simultaneously designing the matching and the filter circuits in sonar systems [21]; they focused on theoretical design, in order to apply parasitic elements of a transformer to the matching/filter circuits. To design a medium-voltage converter, it is important to consider the parasitic elements of the transformer, because the parasitic capacitance can affect its efficiency and control method [22].…”

“…As can be seen in previous papers, studies of sonar transmitters have not presented a variety of views beyond ultrasonic transmitters. Recently presented papers have focused on either the matching/filter design or the PWM control, but not shown the integral system [3,16,21]. This paper presents the design and control of a sonar transmitter for the widely distributed impedance load to which the study field is generally inaccessible.…”