氣壓肌肉主動式車輛懸吊系統

Pneumatic Muscle Active Vehicle Suspension System

主動式車輛懸吊可抑制車輛行經顛簸路面時所造成之車體變化,使車輛提升乘客舒適性之外同時增加安全性。傳統主動式車輛懸吊在致動裝置的選擇上多以液壓缸及氣壓缸為主,但因液壓致動器 ,會受溫度變化影響且易造成環境污染,而氣壓缸存在高摩擦、低阻尼等缺點。本發明改善傳統液壓與氣壓缸致動器問題並降低了生產成本和銷售價格,為了增加車輛舒適性與安全性並從系統中去除傳統液壓與氣壓缸致動器,所提出此發明,將氣壓肌肉致動技術應用於車輛主動式懸吊系統中,經過設計後,使致動器可以在車輛行駛過程中輔助抑振。

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特點:

1.主動式車輛懸吊系統和有效抑制行車時所產生的振動

2.通過使用氣壓肌肉結構簡單實現低成本

3.使車輛提升乘客舒適性與增加安全性

創新:

用氣動元件驅動,結合氣壓傳動技術的輕巧性、柔順性與安全性,並將致動器與懸吊系統做結合,抑制車體的外部干擾,進而改善乘坐的舒適性。 

Experimental Results 

  AMSS-PM Unit  

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The main components of the AMSS-PM unit are constructed using two MacPherson struts and a PM. This unit also contains a sprung mass which includes a counterweight and an upper support frame to represent a car-body. To measure the displacement and the acceleration of the sprung mass, a linear encoder and an accelerometer are installed on the upper support frame and a linear scale is installed in the plane of the under support frame to measure vertical  displacement. The PM, in parallel with two MacPherson struts, are installed between the vehicle body and the wheel-axle to generate control force to the suspension. A proportional pressure regulator (PPR) regulates air into the PM and the PM produces vertical movement to attenuate external vibration from irregular roads and to maintain the upper support frame in a stable position.

RPG Unit

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The RPG unit, consists of a wheel, rollers, an induction motor and a pneumatic cylinder. The induction motor, which is controlled by a frequency converter, rotates the rollers to induce rotation of the wheel. The maximum speed that the wheel can reach is 35 km/hr. A PDCV regulates the flow of air into the cylinder to create vertical displacements to take account of road conditions. The maximum pressure that is provided by the air compressor is 6 bar. To connect the base and the frame for the rollers, the bottom of the pneumatic cylinder is fixed to the base and the rollers bear firmly on the tire. A linear scale which is installed on the support frame is applied to measure the vertical variation in the road profile that is created by the pneumatic cylinder.

 PBC Unit

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The PPR is installed inside a control box in the PBC unit. The PBC is implemented on a National Instruments (NI) cRIO-9074 integrated system with an industrial 400 MHz real-time processor, a 64GB memory, a NI-9263 D/A card, a NI-9215 A/D card and a NI-9411 encoder card. The NI-9215 A/D card receives data, including the displacement of the unsprung mass and under support frame, and the acceleration of the sprung mass, from the AMSS-PM unit and the RPG unit. The NI-9411 encoder card receives data for the displacement of the sprung mass and the NI-9263 D/A card sends control signals to the proportional directional control valve (PDCV), the inverter and the PPR. The PM, the pneumatic cylinder and the induction motor are driven according to these signals.

Achievements