Tachometric and thermal anemometers are two types of instruments mainly used in typical standard measurements in meteorology, ventilation, air conditioning, technical and industrial measurements. Both types of these instruments have many beneficial metrological properties, which causes their widespread use in many measurement issues. However, the sensors of mechanical anemometers have large dimensions and considerable high mechanical inertia. This is the reason for their poor dynamic properties. This results in dynamic measurement errors that are the cause of the measured average value being normally overstated. Thermal anemometers are dedicated for measurements in fast-changing flows. Hot-wire constant-temperature anemometers due to the low thermal inertia of the sensor and the applied feedback, have a wide frequency bandwidth for velocity fluctuations measurement, reaching hundreds of kilohertz. For standard constant-temperature anemometers this bandwidth strongly depends on flow velocity. In high-amplitude fast-changing flows, this can cause significant dynamic measurement errors. This paper presents two methods for improving the dynamic behavior of respectively rotary and thermal anemometers by active control. These methods are based on the introduction of additional feedback loop to the instruments.

转速和热风速计是两种类型的仪器，主要用于气象，通风，空调，技术和工业测量中的典型标准测量。两种类型的仪器都具有许多有益的计量特性，这导致它们在许多测量问题中得到了广泛使用。然而，机械风速计的传感器具有大尺寸和相当高的机械惯性。这是它们的动态性能差的原因。这会导致动态测量误差，这是测量平均值通常被夸大的原因。热风速计专用于快速变化流量的测量。由于传感器的低热惯性和所施加的反馈，热线恒温风速计 具有很宽的频率带宽来测量速度波动，达到数百千赫兹。对于标准的恒温风速计，此带宽在很大程度上取决于流速。在高振幅快速变化的流量中，这可能会导致明显的动态测量误差。本文提出了两种通过主动控制改善旋转和热风速计动态特性的方法。这些方法是基于将额外的反馈回路引入仪器的。本文提出了两种通过主动控制改善旋转和热风速计动态特性的方法。这些方法是基于将额外的反馈回路引入仪器的。本文提出了两种通过主动控制改善旋转和热风速计动态特性的方法。这些方法是基于将额外的反馈回路引入仪器的。